Готові списки джерел за темами / CFD METHODOLOGY

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій
Звіти організацій

Добірка наукової літератури з теми "CFD METHODOLOGY"

Автор: Grafiati

Опубліковано: 11 вересня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "CFD METHODOLOGY".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "CFD METHODOLOGY"

Shaikh, J. "A Methodology for Industrial CFD." NAFEMS International Journal of CFD Case Studies 4 (January 2004): 15–25. http://dx.doi.org/10.59972/grz5jq8h.

Повний текст джерела

Анотація:

The central tenet of this paper is that there is no fixed level of credibility or accuracy that is applicable to all CFD simulations. The required level of accuracy is dependent on the industrial context for the work. This paper describes a framework suggested by the American Institute of Aeronautics and Astronautics [1] designed to aid the assessment of the credibility of CFD simulations. The framework distinguishes between Reality, the Conceptual Model of Reality and the Computational CFD model. The processes of Qualification, Verification and Validation are used to assess the levels of Error and Uncertainty within the simulation system. The methodology presented is not exhaustive and is intended to act as a guideline for the assessment of Industrial CFD simulations.

Стилі APA, Harvard, Vancouver, ISO та ін.

Thelliez, Marina, Andreas Ennemoser, Maria Isabel Segura, and Kang-Ki Lee. "CFD Methodology for Greenhouse Gas Emissions Reduction." MTZ worldwide 81, no. 11 (October 9, 2020): 50–55. http://dx.doi.org/10.1007/s38313-020-0301-z.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Wu, Ran Ran, and Ding Fan. "Air Pressure Reducer Modeling by CFD Methodology." Advanced Materials Research 960-961 (June 2014): 547–50. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.547.

Повний текст джерела

Анотація:

In this paper, the computational fluid dynamics (CFD) methodology as well as the shear-stress transport (SST) k-omega turbulence model was adopted to model the air pressure reducer (APR). Changing the gas needle’s displacement of APR continuously, the writer obtains the displacement-pressure characteristics of APR. In order to demonstrate the validity of these characteristics, a physical experiment was conducted, which generates another displacement-pressure characteristic. Comparing the two characteristics with a good agreement, it is indicated that the CFD methodology is suitable to study the displacement-pressure characteristics of APR.

Стилі APA, Harvard, Vancouver, ISO та ін.

Agonafer, D., and A. Vimba. "Solid Model Based Preprocessor to CFD Code for Applications to Electronic Cooling Systems." Journal of Electronic Packaging 119, no. 2 (June 1, 1997): 138–43. http://dx.doi.org/10.1115/1.2792220.

Повний текст джерела

Анотація:

The use of a solid model based Computer Aided Design (CAD) tool as a preprocessor to a finite control-volume based Computational Fluid Dynamics (CFD) code is presented. Preprocessing includes geometry description, grid generation, definition of material properties, application of boundary conditions, and definition of solution control parameters. The CAD based preprocessor, as opposed to traditional finite control-volume preprocessors, provides the above capabilities in a powerful graphic environment. Using a solid model based CAD tool, work is reduced, and visualization is enhanced employing the capabilities of the three-dimensional solid modeler. In addition, a technique which categorizes control volumes into groups comprising the solid and fluid portions of the problem domain is presented. At the completion of preprocessing, a model appropriate as input to a CFD code is generated. This model is then solved using the CFD program. The process is shown in a tutorial form by considering a two-dimensional turbulent flow problem in an electronic card on board package. Although the methodology shown in this paper focuses on specific CFD and Solid Model programs, the concept can readily be applied to other CFD and/or Solid Model programs.

Стилі APA, Harvard, Vancouver, ISO та ін.

Soto, Orlando, Rainald Löhner, and Chi Yang. "An adjoint‐based design methodology for CFD problems." International Journal of Numerical Methods for Heat & Fluid Flow 14, no. 6 (September 2004): 734–59. http://dx.doi.org/10.1108/09615530410544292.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Mansouri, A., H. Arabnejad, S. A. Shirazi, and B. S. McLaury. "A combined CFD/experimental methodology for erosion prediction." Wear 332-333 (May 2015): 1090–97. http://dx.doi.org/10.1016/j.wear.2014.11.025.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Yao, Zhen-qiu, Hong-cui Shen, and Hui Gao. "A new methodology for the CFD uncertainty analysis." Journal of Hydrodynamics 25, no. 1 (February 2013): 131–47. http://dx.doi.org/10.1016/s1001-6058(13)60347-9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bezzo, F., S. Macchietto, and C. C. Pantelides. "A general methodology for hybrid multizonal/CFD models." Computers & Chemical Engineering 28, no. 4 (April 2004): 501–11. http://dx.doi.org/10.1016/j.compchemeng.2003.08.004.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bezzo, F., and S. Macchietto. "A general methodology for hybrid multizonal/CFD models." Computers & Chemical Engineering 28, no. 4 (April 2004): 513–25. http://dx.doi.org/10.1016/j.compchemeng.2003.08.010.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Nastac, L., F. R. Dax, and W. Hanusiak. "Methodology for modeling the EB-PVD coating process." Journal de Physique IV 120 (December 2004): 307–14. http://dx.doi.org/10.1051/jp4:2004120035.

Повний текст джерела

Анотація:

This paper presents a methodology for modeling and analyzing the Electron Beam-Physical Vapor Deposition (EB-PVD) coating process. The Knudsen (Kn) number for the current processing conditions is near but smaller than 0.1 so the continuum approach (based on Navier-Stokes equations) is still valid though the dilute gas regime is considered. The methodology developed in this work is applied to optimization of the evaporation and deposition rates and patterns of metal vapors on ceramic substrates. The methodology is based on the numerical solution of evaporation, fluid flow, species transfer, heat transfer, and a deposition/condensation kinetics model. The models developed for the analysis of the coating process include an ingot EB-melting/evaporation model, a computational fluid dynamics (CFD)-vapor distribution/plume dynamics model (chamber model), and a coating-kinetics model. Numerical simulations at the macro-level were conducted using CFD software. The results from the ingot EB-melting/evaporation model are used as input data in the CFD-vapor distribution model. The coating-kinetics model uses as input, data pressure, temperature, and concentration of Ti-6Al-4V (Ti-6-4) vapors computed with the CFD model. To account for the rarefied gas regime (where Knudsen number [Kn] could be larger than 0.1), appropriate low-pressure “boundary slip conditions” with momentum and thermal accommodation coefficients as a function of Kn were used. Numerical results for temperature and Ti-6-4 vapor concentration profiles in the chamber are presented. Experiments conducted at FMW Composite Systems Inc. are also presented.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "CFD METHODOLOGY"

Alghamdi, Jamal Khaled. "CFD Simulation Methodology for Ground-Coupled Ventilation System." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35736.

Повний текст джерела

Анотація:

In the past two decades, a growing interest in alternative energy resources as a replacement to the non-renewable resources used now days. These alternatives include geothermal energy which can be used to generate power and reduce the demands on energy used to heat and cool buildings. Ground-coupled ventilation system is one of the many applications of the geothermal energy that have a lot of attention in the early 80â s and 90â s but all designs of the system where based on single case situations. On the other hand, computational fluid dynamics tools are used to simulate heat and fluid flow in any real life situation. They start to develop rapidly with the fast development of computers and processors. These tools provide a great opportunity to simulate and predict the outcome of most problems with minimum loss and better way to develop new designs. By using these CFD tools in GCV systems designing procedure, energy can be conserved and designs going to be improved. The main objective of this study is to find and develop a CFD modeling strategy for GCV systems. To accomplish this objective, a case study must be selected, a proper CFD tool chosen, modeling and meshing method determined, and finally running simulations and analyzing results. All factors that affect the performance of GCV should be taken under consideration in that process such as soil, backfill, and pipes thermal properties. Multiple methods of simulation were proposed and compared to determine the best modeling approach.
Master of Science

Стилі APA, Harvard, Vancouver, ISO та ін.

Bhardwaj, Manoj K. "A CFD/CSD Interaction Methodology for Aircraft Wings." Diss., web access:, 1997. http://scholar.lib.vt.edu/theses/public/etd-91097-165322/etd-title.html.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Smuts, Evan Matthew. "A methodology for coupled CFD-DEM modeling of particulate suspension rheology." Doctoral thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/16782.

Повний текст джерела

Анотація:

Includes bibliographical references
The flow properties, or rheology, of particulate suspensions are highly dependent on the properties of the particles suspended within the base fluid (e.g. size, shape and surface properties). An understanding of the suspension rheology can help in the prediction of its behaviour under various flow conditions. Many studies focus on the experimental measurement of suspension properties, commonly employing devices such as rheometers to measure fluid properties under different conditions. A numerical model that is able to simulate the real-world interactions that determine particulate suspension rheology would complement those experimental studies. Accordingly, this work outlines a methodology for the development of such a model. Due to the differences between the two phases in a suspension, two different numerical methods were used, namely Computational Fluid Dynamics (CFD) and the Discrete Element Method (DEM). CFD uses a continuum approach to model the fluid component, while DEM resolves the behaviour of each individual particle. Two separate software programmes were used. For CFD, Open FOAM® was chosen, and for DEM, a programme called LIGGGHTS was used. These two different codes were coupled together with another programme called CFDEM. All three packages are open source software. To measure the rheology of the mixture, it was decided to simulate a rheometer. In particular, a rate-controlled, concentric-cylinder arrangement was chosen. Flow would be driven by a moving inner wall. Particle surface charge was accounted for by including both the van der Waals and electrostatic long-range forces between particles. This combination is known as the DLVO force. Plain particles, with no DLVO forces, were also considered. To the author's knowledge, using a coupled CFD-DEM approach to model suspension rheology had never been attempted before. Therefore, it was decided the development of the model would be done in stages, adding more complexity as each stage proved successful. The first step was to model a reduced rheometer geometry using CFD. Both a Newtonian and a non-Newtonian single-phase fluid were tested. Water and a Herschel-Bulkley mineral slurry were used respectively. Different rheometer geometries were tested. Results from these models correlated well with experimental values. The single-gap rheometer geometry with a 500μm gap between the inner and outer walls was found to perform the best. Final CFD model parameters used in these simulations were used as the basis for the coupled model. To reduce computational complexity, the model size and shape had to be reduced from a full-sized rheometer to that of a small rectangular box, with opposing flat walls acting as inner and outer cylinders of a rheometer. This improved computational efficiency. CFD tests conducted on the new box geometry showed that a box with sides of length 50μmproduced results equivalent to larger, full-sized, single-gap rheometer geometries with curved walls.

Стилі APA, Harvard, Vancouver, ISO та ін.

DELOGU, ENRICO. "A comprehensive CFD methodology for the simulation of Spark Ignited Engines." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2507615.

Повний текст джерела

Анотація:

In this work, a Computational Fluid Dynamic methodology for the simulation of the charge formation process in Gasoline Direct Injection engines is presented. The aim of the work is to develop a methodology suitable in an industrial environment to drive and support the development process of modern GDI engines. A big emphasis is placed on the comparison of the proposed CFD models with experimental data obtained using a single-cylinder optical engine. Chapter 1 describes the working context and sets the aim of the work. After a brief recall of the theoretical background of CFD in chapter 2, an overview of the optical techniques interesting for Internal Combustion Engine applications is presented in chapter 3, and the basic principles of spray atomization theory are reviewed in chapter 4. In chapter 5 the CFD simulations for the charge motion in-cylinder are described. Two different engines were investigated, and the effect of different turbulence models and numerical schemes are analyzed, comparing the results with optical experimental data. The standard k-eps model, together with the MARS numerical scheme, showed the better capability to reproduce the charge motion and turbulence pattern in-cylinder, and therefore they were used for the remaining part of the work. In chapter 7 the injection model used is discussed. Despite a traditional Lagrangian-Eulerian approach, the model presents an innovative procedure capable to reproduce also the liquid core. After that the effects of the use of the liquid core and a bi-component fuel are analyzed, the in-cylinder injection results for the two investigated engines are presented. The injection model shows its capability to correctly reproduce the spray shape and penetration in different operating conditions and for different injector types, using a reduced amount of calibration parameters. Finally, chapter 8 presents some "diagnostic indexes" capable to resume the results of the CFD simulations in a reduced number of parameters. In particular, some indexes to assess the quality of the mixture and the wall impingement tendency are proposed, allowing to use the CFD simulations to address these crucial aspects in the choice of injector targeting and actuation strategy. The proposed methodology allows to use CFD simulations to support the engine development process, and was successfully applied to many different spark ignited engines.

Стилі APA, Harvard, Vancouver, ISO та ін.

Sharma, Neha. "Development of CFD Methodology to Quantify Particle-transmission Percentage of Personal Protective Equipment." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523635154570205.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Cook, James Richard. "Development of an aeroelastic methodology for surface morphing rotors." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51807.

Повний текст джерела

Анотація:

A Computational Fluid Dynamics/Computational Fluid Dynamics (CFD/CSD) coupling interface was developed to obtain aeroelastic solutions of a morphing rotor. The methodology was implemented in Fully Unstructured Navier-Stokes (FUN3D) solver, which communicates aerodynamic forces on the blade surface to University of Michigan’s Nonlinear Active Beam Solver (UM/NLABS) and then imports structural deflections of the blade surface during each time step. Development of this methodology adds the capability to model elastic rotors with flexible airfoils. The method was validated through an aerodynamic work analysis, comparison of sectional blade loads and deflections with experimental data, and two-dimensional stability analyses for pitch/plunge flutter and camber flutter. Computational simulations were performed for a rotor in forward flight with the CFD/CSD solver and with a comprehensive CSD solver using finite-state (F-S) aerodynamics, and results were compared. Prescribed three-per-revolution camber deflections were then applied, and solutions of the CFD/CSD and comprehensive CSD computations indicated that three-per-revolution camber actuation has the potential to minimize hub forces and moments with deflections as small as 0.25%c. In anticipation of active rotor experiments inside enclosed facilities, the capability of CFD for accurately simulating flow inside enclosed volumes was examined. It was determined that URANS models are not suitable for rotor simulations in an enclosed facility, and components that are a distance of two to three rotor radii from the hub were also observed to have a large influence on recirculation and performance.

Стилі APA, Harvard, Vancouver, ISO та ін.

Sorato, Sebastiano. "Methodology to analyse three dimensional droplet dispersion applicable to Icing Wind Tunnels." Thesis, Cranfield University, 2009. http://hdl.handle.net/1826/4413.

Повний текст джерела

Анотація:

This dissertation presents a methodology to simulate the dispersion of water droplets in the air flow typical of an Icing Tunnel. It is based on the understanding the physical parameters that influence the uniformity and the distribution of cloud of droplets in the airflow and to connect them with analytical parameters which may be used to describe the dispersion process. Specifically it investigates the main geometrical and physical parameters contributing to the droplets dispersion at different tunnel operative conditions, finding a consistent numerical approach to reproduce the local droplets dynamic, quantifying the possible limits of commercial CFD methods, pulling out the empirical parameters/constant needing to simulate properly the local conditions and validating the results with calibrated experiment. An overview of the turbulence and multiphase flow theories, considered relevant to the Icing Tunnel environment, is presented as well as basic concepts and terminology of particle dispersion. Taylor’s theory of particle dispersion has been taken as starting point to explain further historical development of discrete phase dispersion. Common methods incorporated in commercial CFD software are explained and relative shortcomings underlined. The local aerodynamic condition within tunnel, which are required to perform the calculation with the Lagrangian particle equation of motions, are generated numerically using different turbulent models and are compared to the historical K-ε model. Verification of the calculation is performed with grid independency studies. Stochastic Separated Flow methods are applied to compute the particle trajectories. The Discrete Random Walk, as described in the literature, has been used to perform particle dispersion analysis. Numerical settings in the code are related to the characteristics of the local turbulent condition such as turbulence intensity and length scales. Cont/d.

Стилі APA, Harvard, Vancouver, ISO та ін.

Gunasekaran, Barani. "Development and validation of a pressure based CFD methodology for acoustic wave propagation and damping." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8740.

Повний текст джерела

Анотація:

Combustion instabilities (thermo-acoustic pressure oscillations) have been recognised for some time as a problem limiting the development of low emissions (e.g., lean burn) gas turbine combustion systems, particularly for aviation propulsion applications. Recently, significant research efforts have been focused on acoustic damping for suppression of combustion instability. Most of this work has either been experimental or based on linear acoustic theory. The last 3-5 years has seen application of density based CFD methods to this problem, but no attempts to use pressure-based CFD methods which are much more commonly used in combustion predictions. The goal of the present work is therefore to develop a pressure-based CFD algorithm in order to predict accurately acoustic propagation and acoustic damping processes, as relevant to gas turbine combustors. The developed computational algorithm described in this thesis is based on the classical pressure-correction approach, which was modified to allow fluid density variation as a function of pressure in order to simulate acoustic phenomena, which are fundamentally compressible in nature. The fact that the overall flow Mach number of relevance was likely to be low ( mildly compressible flow) also influenced the chosen methodology. For accurate capture of acoustic wave propagation at minimum grid resolution and avoiding excessive numerical smearing/dispersion, a fifth order accurate Weighted Essentially Non-Oscillatory scheme (WENO) was introduced. Characteristic-based boundary conditions were incorporated to enable accurate representation of acoustic excitation (e.g. via a loudspeaker or siren) as well as enable precise evaluation of acoustic reflection and transmission coefficients. The new methodology was first validated against simple (1D and 2D) but well proven test cases for wave propagation and demonstrated low numerical diffusion/dispersion. The proper incorporation of Characteristic-based boundary conditions was validated by comparison against classical linear acoustic analysis of acoustic and entropy waves in quasi-1D variable area duct flows. The developed method was then applied to the prediction of experimental measurements of the acoustic absorption coefficient for a single round orifice flow. Excellent agreement with experimental data was obtained in both linear and non-linear regimes. Analysis of predicted flow fields both with and without bias flow showed that non-linear acoustic behavior occurred when flow reversal begins inside the orifice. Finally, the method was applied to study acoustic excitation of combustor external aerodynamics using a pre-diffuser/dump diffuser geometry previously studied experimentally at Loughborough University and showed the significance of boundary conditions and shear layer instability to produce a sustained pressure fluctuation in the external aerodynamics.

Стилі APA, Harvard, Vancouver, ISO та ін.

KYAW, OO D'AMORE GIADA. "A Combined FEM-CFD Methodology to Study and Optimize Acoustic Properties of Marine Exhaust Lines." Doctoral thesis, Università degli Studi di Trieste, 2022. http://hdl.handle.net/11368/3030492.

Повний текст джерела

Анотація:

Lo sviluppo di sistemi di abbattimento compatti in grado di ridurre sia NOx che SOx è di forte interesse, per la difficoltà di combinare su una nave sia sistemi di riduzione catalitica selettiva che tecnologie di scrubber. Quindi, la ricerca sviluppata in questa tesi nasce dalla necessità di integrazione del sistema lungo la linea di scarico per risparmiare spazio e dalla necessità di disporre di un modello numerico adeguato per simulare le proprietà acustiche dei sistemi di depurazione dei gas di scarico per la loro ottimizzazione. L'obiettivo di questa tesi è sviluppare una metodologia numerica efficiente dal punto di vista computazionale che utilizzi una combinazione di simulazioni CFD e FEM, per consentire lo studio e l'ottimizzazione delle proprietà acustiche dei componenti della linea di scarico, rispettando i limiti imposti sia ai parametri geometrici che alle caratteristiche del flusso dalle reazioni chimiche necessarie per soddisfare le normative NOx e SOx. Sono stati eseguiti alcuni studi preliminari per ottimizzare l’onere computazionale delle simulazioni numeriche. Inoltre, sono state eseguite misurazioni sperimentali, sia su un set-up semplificato (tubo di impedenza) sia su un mockup di una linea di scarico di un Genset marino, al fine di valutare i risultati numerici. Le simulazioni CFD e FEM validate sono poi utilizzate per l'approccio combinato che, in primo luogo, calcola il campo di flusso (velocità e temperatura) con una simulazione CFD in regime stazionario e, poi, importa questo campo nel modello acustico FEM tramite il mesh mapping per valutare la trnsmission loss della geometria studiata in presenza di flusso. L'approccio combinato è stato quindi utilizzato per valutare e modellare le proprietà acustiche sia del catalizzatore di ossidazione diesel che dello scrubber costruiti per il Genset. La loro transmission loss raggiunge valori fino a 60 dB, permettendo di eliminare il silenziatore tradizionale, riducendo così l'ingombro della linea di scarico.
The development of compact abatement systems capable of reducing both NOx and SOx is of strong interest, due to the difficulty of combining both selective catalytic reduction systems and scrubber technologies on a ship. So, the research developed in this thesis comes from the need for system integration along the exhaust line to save space and the need to have a proper numerical model to simulate the acoustic properties of exhaust gas cleaning systems for their optimization. The objective of this thesis is to develop a computationally-efficient numerical methodology employing a combination of both CFD and FEM simulations, to allow the investigation and optimization of acoustic properties of exhaust line components, while respecting the limits imposed on both geometrical parameters and flow characteristics by the chemical reactions needed to satisfy NOx and SOx regulations. Some preliminary studies are performed to optimize computational effort of numerical simulations. Moreover, experimental measurements are performed on both a simplified set-up (impedance tube) and a mockup of a marine Genset exhaust line in order to assess the numerical results. The assessed CFD and FEM simulations are used for the combined approach that, firstly, calculates the flow field (velocity and temperature) with a steady-state CFD simulation and, then, imports this field into the acoustic FEM model through mesh mapping to evaluate the transmission loss of the studied geometry in presence of flow. The combined approach is then used on real systems, to assess and model the acoustics properties of both diesel oxidation catalyst and scrubber constructed for a Genset mockup. Their transmission loss reach values up to 60 dB, which allows elimination of the traditional silencer, thus reducing the overall dimensions.

Стилі APA, Harvard, Vancouver, ISO та ін.

Kim, Jee Woong. "Development of a physics based methodology for the prediction of rotor blade ice formation." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54390.

Повний текст джерела

Анотація:

Modern helicopters, civilian and military alike, are expected to operate in all weather conditions. Ice accretion adversely affects the availability, affordability, safety and survivability. Availability of the vehicle may be compromised if the ice formation requires excessive torque to overcome the drag needed to operate the rotor. Affordability is affected by the power requirements and cost of ownership of the deicing systems needed to safely operate the vehicle. Equipment of the rotor blades with built-in heaters greatly increases the cost of the helicopter and places further demands on the engine. The safety of the vehicle is also compromised due to ice shedding events, and the onset of abrupt, unexpected stall phenomena attributable to ice formation. Given the importance of understanding the effects of icing on aircraft performance and certification, considerable work has been done on the development of analytical and empirical tools, accompanied by high quality wind tunnel and flight test data. In this work, numerical studies to improve ice growth modeling have been done by reducing limitations and empiricism inherent in existing ice accretion models. In order to overcome the weakness of Lagrangian approach in unsteady problem such as rotating blades, a water droplet solver based on 3-D Eulerian method is developed and integrated into existing CFD solver. Also, the differences between the industry standard ice accretion analyses such as LEWICE and the ice accretion models based on the extended Messinger model are investigated through a number of 2-D airfoil and 3-D rotor blade ice accretion studies. The developed ice accretion module based on 3-D Eulerian water droplet method and the extended Messinger model is also coupled with an existing empirical ice shedding model. A series of progressively challenging simulations have been carried out. These include ability of the solvers to model airloads over an airfoil with a prescribed/simulated ice shape, collection efficiency modeling, ice growth, ice shedding, de-icing modeling, and assessment of the degradation of airfoil or rotor performance associated with the ice formation. While these numerical simulation results are encouraging, much additional work remains in modeling detailed physics important to rotorcraft icing phenomena. Despite these difficulties, progress in assessing helicopter ice accretion has been made and tools for initial analyses have been developed.Modern helicopters, civilian and military alike, are expected to operate in all weather conditions. Ice accretion adversely affects the availability, affordability, safety and survivability. Availability of the vehicle may be compromised if the ice formation requires excessive torque to overcome the drag needed to operate the rotor. Affordability is affected by the power requirements and cost of ownership of the deicing systems needed to safely operate the vehicle. Equipment of the rotor blades with built-in heaters greatly increases the cost of the helicopter and places further demands on the engine. The safety of the vehicle is also compromised due to ice shedding events, and the onset of abrupt, unexpected stall phenomena attributable to ice formation. Given the importance of understanding the effects of icing on aircraft performance and certification, considerable work has been done on the development of analytical and empirical tools, accompanied by high quality wind tunnel and flight test data. In this work, numerical studies to improve ice growth modeling have been done by reducing limitations and empiricism inherent in existing ice accretion models. In order to overcome the weakness of Lagrangian approach in unsteady problem such as rotating blades, a water droplet solver based on 3-D Eulerian method is developed and integrated into existing CFD solver. Also, the differences between the industry standard ice accretion analyses such as LEWICE and the ice accretion models based on the extended Messinger model are investigated through a number of 2-D airfoil and 3-D rotor blade ice accretion studies. The developed ice accretion module based on 3-D Eulerian water droplet method and the extended Messinger model is also coupled with an existing empirical ice shedding model. A series of progressively challenging simulations have been carried out. These include ability of the solvers to model airloads over an airfoil with a prescribed/simulated ice shape, collection efficiency modeling, ice growth, ice shedding, de-icing modeling, and assessment of the degradation of airfoil or rotor performance associated with the ice formation. While these numerical simulation results are encouraging, much additional work remains in modeling detailed physics important to rotorcraft icing phenomena. Despite these difficulties, progress in assessing helicopter ice accretion has been made and tools for initial analyses have been developed.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Книги з теми "CFD METHODOLOGY"

United States. National Aeronautics and Space Administration., ed. A CFD/CSD interaction methodology for aircraft wings: A dissertation ... [Washington, DC: National Aeronautics and Space Administration, 1997.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

W, Hou Gene, and United States. National Aeronautics and Space Administration., eds. Methodology for sensitivity analysis, approximate analysis, and design optimization in CFD for multidisciplinary applications. Norfolk, Va: Old Dominion University Research Foundation, 1992.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

George C. Marshall Space Flight Center., ed. Advanced CFD methodology for fast transients encountered in nonlinear combustion instability problems: SBIR phase II final report (restricted circulation). [Marshall Space Flight Center, Ala.]: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1992.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

W, Hou Gene, and United States. National Aeronautics and Space Administration., eds. Methodology for sensitivity analysis, approximate analysis, and design optimization in CFD for multidisciplinary applications: Final report for the period ended December 31, 1995. Norfolk, Va: Dept. of Mechanical Engineering, College of Engineering & Technology, Old Dominion University, 1996.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

W, Hou Gene, and United States. National Aeronautics and Space Administration., eds. Methodology for sensitivity analysis, approximate analysis, and design optimization in CFD for multidisciplinary applications: Progress report for the period April 15, 1992 to January 31, 1993. Norfolk, Va: Old Dominion University Research Foundation, 1993.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Baysal, Oktay. Efficient gradient-based shape optimization methodology using inviscid/viscous CFD: Summary of research report for the period of March 9, 1995 to March 8, 1997, grant# NCC-1-211. Norfolk, Va: Dept. of Aerospace Engineering, College of Engineering and Technology, Old Dominion University, 1997.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

United States. National Aeronautics and Space Administration., ed. Efficient gradient-based shape optimization methodology using inviscid/viscous CFD: Summary of research report for the period of March 9, 1995 to March 8, 1997, grant# NCC-1-211. Norfolk, Va: Dept. of Aerospace Engineering, College of Engineering and Technology, Old Dominion University, 1997.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Knorr, Jeffrey B. CAD models for inductive strips in homogeneous finline: The methodology. Monterey, Calif: Naval Postgraduate School, 1990.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Частини книг з теми "CFD METHODOLOGY"

Baum, Joseph D., Hong Luo, Eric L. Mestreau, Dmitri Sharov, Rainald Löhner, Daniele Pelessone, and Charles Charman. "Recent Developments of a Coupled CFD/CSD Methodology." In Computational Science — ICCS 2001, 1087–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45545-0_120.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Baum, J. D., E. L. Mestreau, H. Luo, R. Löhner, D. Pelessone, and C. Charman. "Recent development of a coupled CFD/CSD methodology using an embedded approach." In Shock Waves, 1137–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-27009-6_175.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Mota Ferreira, João, Alexis Tinchon, Carlo Coratella, Richard Oung, Laurent Doradoux, and Fabrice Foucher. "A Validation Methodology for the 3D-CFD Model of a Hydrogen Injector." In Proceedings, 351–67. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-42048-2_24.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Fang, Ping, Tingzhang Liu, Kai Liu, and Jianfei Zhao. "Study on Temperature Distribution with CFD Simulations of an Air-Conditioned Room." In Theory, Methodology, Tools and Applications for Modeling and Simulation of Complex Systems, 245–52. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2669-0_27.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Baum, Joseph D., Hong Luo, Eric L. Mestreau, Rainald Löhner, Daniele Pelessone, and Charles Charman. "A Coupled CFD/CSD Methodology for Simulating Structural Response to Airblast and Fragment." In Computational Fluid Dynamics 2000, 659–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56535-9_100.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Baum, Joseph D., Eric L. Mestreau, Hong Luo, Rainald Löhner, Daniele Pelessone, and Charles Charman. "Development and Applications of a Coupled CFD/CSD Methodology Using an Embedded CSD Approach." In Computational Fluid Dynamics 2002, 514–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-59334-5_77.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Junior, Celso Antonio Bittencourt Sales, Angie Lizeth Espinosa Sarmiento, and Francesco Balduzzi. "Dimensionless Coefficients for Validation and Evaluation of a CFD Methodology Applied to a H-Darrieus Vertical Axis Wind Turbine." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering, 30–35. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_5.

Повний текст джерела

Анотація:

AbstractSmall-scale wind turbines can play an important role in the energy transition by providing distributed generation in urban and rural areas. They can help decrease the reliance on traditional forms of energy generation, such as fossil fuels, which can have negative environmental impacts. Thereby, this study aims to implement and complement a computational fluid dynamics (CFD) methodology for predicting the aerodynamic performance of a H-Darrieus Vertical Axis Wind Turbine (VAWT). The analysis of dimensionless numbers, such as Grid-reduced Vorticity (GRV) and Reference Courant Number (Co*), is used to indicate the suitability of spatial and temporal discretizations. Results for Power Coefficient (Cp) agreed with data from the literature and were associated with corresponding GRV and Co* values. It was also identified that incorporating the evaluation and analysis of dimensionless numbers as simulation parameters can guide methodology settings and significantly reduce simulation time compared to conventional methods such as mesh independence studies.

Стилі APA, Harvard, Vancouver, ISO та ін.

da Silva, Breno Farias, Fernando Costa da Cruz, Harlysson Wheiny Silva Maia, Toshi-Ichi Tachibana, Vitor Hugo Macedo Cardoso, and Yuri Victor Remígio Guedes. "Methodology for Improvement of the Hydrodynamic Efficiency of an Amazon School Boat Utilizing a CFD Tool." In Proceedings of the 25th Pan-American Conference of Naval Engineering—COPINAVAL, 93–103. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89812-4_9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bhatia, Bharat, and Ashoke De. "Numerical Investigation of Flow-Acoustics Coupling in a Half-Dump Combustor Using Hybrid CFD-CAA Methodology." In Green Energy and Technology, 337–59. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2648-7_15.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bertol, Daniela. "Computer-Aided Design Methodology." In Visualizing with CAD, 62–103. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4757-6946-3_2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "CFD METHODOLOGY"

Peroomian, Oshin, Sukumar Chakravarthy, Uriel Goldberg, Oshin Peroomian, Sukumar Chakravarthy, and Uriel Goldberg. "A 'grid-transparent' methodology for CFD." In 35th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-724.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Camberos, Jose, Larry Lambe, and Richard Luczak. "CFD with Hybrid Symbolic-Numeric Methodology." In 42nd AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-242.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Baum, Joseph, Hong Luo, Eric Mestreau, Dmitri Sharov, Rainald Loehner, Daniele Pelessone, and Charles Charman. "Recent developments of a coupled CFD/CSD methodology." In 15th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-2618.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Hufford, G., and S. Habchi. "Validation of CFD methodology for ejection seat applications." In 32nd Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-751.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bhardwaj, Manoj, Rakesh Kapania, Eric Reichenbach, and Guru Guruswamy. "A CFD/CSD interaction methodology for aircraft wings." In 7th AIAA/USAF/NASA/ISSMO Symposium on Multidisciplinary Analysis and Optimization. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-4783.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Andrés, Esther, Carlos Carreras, Gabriel Caffarena, Maria del Carmen Molina, Octavio Nieto-Taladriz, and Francisco Palacios. "A Methodology for CFD Acceleration Through Reconfigurable Hardware." In 46th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-481.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Cokljat, Davor, Domenico Caridi, Gerhard Link, Richard Lechner, and Florian R. Menter. "Embedded LES Methodology for General-Purpose CFD Solvers." In Sixth International Symposium on Turbulence and Shear Flow Phenomena. Connecticut: Begellhouse, 2009. http://dx.doi.org/10.1615/tsfp6.1900.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Pearse, M. "Modelling methodology for thermo-electric coolers in CFD." In 2008 2nd Electronics Systemintegration Technology Conference. IEEE, 2008. http://dx.doi.org/10.1109/estc.2008.4684518.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Lohner, Rainald, Orlando Soto, and Chi Yang. "An Adjoint-Based Design Methodology for CFD Optimization Problems." In 41st Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-299.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Shah, Chirag, Praveen Kumar, Rohit Chavan, and Sandip Jadhav. "Methodology to Evaluate the Room ADPI through CFD Simulation." In 2021 Building Simulation Conference. KU Leuven, 2021. http://dx.doi.org/10.26868/25222708.2021.30661.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "CFD METHODOLOGY"

Bhardwaj, M. K., R. K. Kapania, E. Reichenbach, and G. P. Guruswamy. A CFD/CSD interaction methodology for aircraft wings. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/658442.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Reisenthel, Patrick H. Advanced Adaptive CFD Methodology for Dynamic Stall. Fort Belvoir, VA: Defense Technical Information Center, July 1997. http://dx.doi.org/10.21236/ada328333.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Aumiller, D. L., E. T. Tomlinson, and R. C. Bauer. A coupled RELAPS-3D/CFD methodology with a proof-of-principle calculation. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/770646.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Voegeli, Sam. PR-317-10701-R01 Temperature Logging as a Mechanical Integrity Test (MIT) for Gas-Filled Caverns. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2012. http://dx.doi.org/10.55274/r0010850.

Повний текст джерела

Анотація:

This report documents the work performed to evaluate the possibility that temperature log anomalies (�cold spots� or departures from temperature linearity with depth) can be indicators of well leaks. The natural gas cavern storage industry does not have a methodology for accurate gas-filled cavern well Mechanical Integrity Tests (MITs). Analyses of some temperature log anomalies in North American gas cavern well completions revealed that temperature log anomalies can be indicators of well leaks. The challenges in applying this technology to quantify gas-filled cavern MITs are threefold: (1) Does a temperature anomaly (�cold spot�) always indicate a leak? (2) Can a leak magnitude be correlated to a temperature log anomaly magnitude? and (3) What protocol should be used for executing such an MIT? This report is not intended to completely address all three issues noted above. However, the research presented here is one of many steps needed to evaluate the possibility of temperature logging as an MIT. Research activities discussed in this report involve computational fluid dynamics (CFD) modeling of both a well and cavern. Specifically, the response from a representative cold spot introduced in the cement sheath of a well and the response from an actual leak are addressed.

Стилі APA, Harvard, Vancouver, ISO та ін.

Knorr, Jeffrey B. CAD Models for Inductive Strips in Homogeneous Finline: The Methodology. Fort Belvoir, VA: Defense Technical Information Center, March 1990. http://dx.doi.org/10.21236/ada224446.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Peters, Sandra. Methodology for Enhancing the International Applicability of the SASB Standards and SASB Standards Taxonomy Updates. CFA Institute, August 2023. http://dx.doi.org/10.56227/23.2.3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Dimova-Gabrovska, Mariyana. Methodology for Composite CAD/CAM Crown Restoration of Lateral Deciduous Teeth. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, May 2021. http://dx.doi.org/10.7546/crabs.2021.05.17.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Marietta, M. G., S. G. Bertram-Howery, D. R. Anderson, R. P. Rechard, K. F. Brinster, R. V. Guzowski, and H. Iuzzolino. Performance assessment methodology demonstration: Methodology development for evaluating compliance with EPA (Environmental Protection Agency) 40 CFR 191, Subpart B, for the Waste Isolation Pilot Plant. Office of Scientific and Technical Information (OSTI), December 1989. http://dx.doi.org/10.2172/5083309.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bridges, Kate. 2018 Mid-Term Elections: Insights from California CD-10 Voters Age 50+: Methodology. AARP Research, October 2018. http://dx.doi.org/10.26419/res.00245.025.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bridges, Kate. 2018 Mid-Term Elections: Insights from California CD-48 Voters Age 50+: Methodology. AARP Research, October 2018. http://dx.doi.org/10.26419/res.00245.028.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!