Bibliografías temáticas / CFD STUDIES

Literatura académica sobre el tema "CFD STUDIES"

Autor: Grafiati

Publicado: 11 de septiembre de 2023

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Artículos de revistas sobre el tema "CFD STUDIES"

Murthy, Y. Rama y K. Udaya Bhaskar. "Parametric CFD studies on hydrocyclone". Powder Technology 230 (noviembre de 2012): 36–47. http://dx.doi.org/10.1016/j.powtec.2012.06.048.

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Chew, J. Y. M., S. S. S. Cardoso, W. R. Paterson y D. I. Wilson. "CFD studies of dynamic gauging". Chemical Engineering Science 59, n.º 16 (agosto de 2004): 3381–98. http://dx.doi.org/10.1016/j.ces.2004.03.042.

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A., Aswandi, B. L. Syaefullah, D. A. Iyai y M. Jen Wajo. "UTILIZATION OF CARBOHYDRATE POTENTIAL IN VARIOUS KINDS OF BANANA COB FLOUR BANANA IN KACANG GOATS". IRAQI JOURNAL OF AGRICULTURAL SCIENCES 53, n.º 4 (30 de agosto de 2022): 732–42. http://dx.doi.org/10.36103/ijas.v53i4.1583.

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The objective of this research was to observe the productivity in kacang goats which were given a complete feed containing flour of various types of banana plant weevils. The material studied in this study was six complete types of feed. Complete feed containing weevil flour from 5 banana plant varieties. Complete feed is prepared with a complete feed composition. The cattle used were 18 male bean goats, mean initial body weight, 15.42 ± 1.98 kg (CV: 13.73%) aged 10-15 months. Livestock is given complete feed containing banana weevil flour for 60 days. The cage is 12 m x 6m in size, construction has a floor platform as high as 140 cm, the enclosure is 1 x 1 m in size and 130 cm in height, equipped with a drinking area. The treatment was in the form of 6 complete types of feed with different formulations, consisting of CF0, CF1, CF2, CF3, CF4, and CF5 containing banana weevil flour with different varieties and control treatment (CF0). The research design used was a completely randomized design with five treatments of complete feed formulas containing hump flour of various banana varieties.The results of the research that the complete feed formulation containing Batu banana hump flour (CF2) and Kapok (CF3) produced the best productivity and performance response of Kacang goat. compared to treatment; CF0 CF1; CF4 and CF5.

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Wang, Yiqun y Lifeng Yan. "CFD Studies on Biomass Thermochemical Conversion". International Journal of Molecular Sciences 9, n.º 6 (27 de junio de 2008): 1108–30. http://dx.doi.org/10.3390/ijms9061108.

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Purimetla, Anil y Jie Cui. "CFD studies on burner secondary airflow". Applied Mathematical Modelling 33, n.º 2 (febrero de 2009): 1126–40. http://dx.doi.org/10.1016/j.apm.2008.01.007.

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Herrmann, David D. "Why use CFD for explosion studies?" Process Safety Progress 27, n.º 2 (2008): 173–75. http://dx.doi.org/10.1002/prs.10237.

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Mørch, H., M. Perić, J. Röper y E. Schreck. "CFD-Supported Design of Lifeboats". NAFEMS International Journal of CFD Case Studies 10 (marzo de 2013): 31–42. http://dx.doi.org/10.59972/ffm3fczg.

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Lifeboats are important for the safety of crew on oil platforms and marine vessels. Their design has so far been mostly based on experimental studies. However, the large number of factors which influence the loads on the lifeboat structure and its occupants makes optimization studies by experimental means both time-consuming and expensive. Besides, many effects cannot be studied at laboratory scale due to the inability to match all similarity parameters, and certain conditions cannot be realized in a laboratory. Numerical simulations based on modern computational fluid dynamics (CFD) methods could complement experimental studies if proven to be sufficiently accurate and efficient. The aim of this study is to demonstrate that this indeed is the case: comparisons between experimental data and simulation results performed by the authors so far indicate that the achieved accuracy in numerical simulations is comparable to the accuracy of experiments. It is also shown that a simulation of one drop test can be performed with sufficient accuracy in one day on a single core of a personal computer. Together with a computational method which uses overlapping grids to simplify the handling of lifeboat motion and specification of initial and boundary conditions, parametric studies of lifeboat water entry have thus become practicable.

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Fullmer, William D. y Jordan Musser. "CFD-DEM solution verification: Fixed-bed studies". Powder Technology 339 (noviembre de 2018): 760–64. http://dx.doi.org/10.1016/j.powtec.2018.08.044.

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Hodapp, Maximilian J., Jhon J. Ramirez-Behainne, Milton Mori y Leonardo Goldstein. "Numerical Studies of the Gas-Solid Hydrodynamics at High Temperature in the Riser of a Bench-Scale Circulating Fluidized Bed". International Journal of Chemical Engineering 2012 (2012): 1–13. http://dx.doi.org/10.1155/2012/786982.

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The hydrodynamics of circulating fluidized beds (CFBs) is a complex phenomenon that can drastically vary depending on operational setup and geometrical configuration. A research of the literature shows that studies for the prediction of key variables in CFB systems operating at high temperature still need to be implemented aiming at applications in energy conversion, such as combustion, gasification, or fast pyrolysis of solid fuels. In this work the computational fluid dynamics (CFD) technique was used for modeling and simulation of the hydrodynamics of a preheating gas-solid flow in a cylindrical bed section. For the CFD simulations, the two-fluid approach was used to represent the gas-solid flow with the k-epsilon turbulence model being applied for the gas phase and the kinetic theory of granular flow (KTGF) for the properties of the dispersed phase. The information obtained from a semiempirical model was used to implement the initial condition of the simulation. The CFD results were in accordance with experimental data obtained from a bench-scale CFB system and from predictions of the semiempirical model. The initial condition applied in this work was shown to be a viable alternative to a more common constant solid mass flux boundary condition.

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Huang, Zhong, Lei Deng y Defu Che. "Experimental and CFD Simulation Studies on Bell-Type Air Nozzles of CFB Boilers". Applied Sciences 9, n.º 18 (11 de septiembre de 2019): 3805. http://dx.doi.org/10.3390/app9183805.

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In this paper, a new bell-type air nozzle, which overcomes the structural defects of traditional bell-type air nozzles, is proposed and validated by cold test and numerical simulation. The pressure drop characteristic of the new bell-type air nozzle is measured. Furthermore, the causes of cover outlet abrasion and blockage, inner tube fracture, and irregular resistance change in traditional bell-type air nozzles applied in circulating fluidized bed (CFB) boilers are analyzed. Then, the performance of the new bell-type air nozzle is evaluated in a real CFB boiler, which is operated under regular working conditions. The results show that the new bell-type air nozzle has stronger anti-wear ability, excellent resistance characteristics, longer service life, and easier maintenance.

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Tesis sobre el tema "CFD STUDIES"

Scanlon, Thomas J. "Vortex shedding flowmeter pulsating flow CFD studies". Thesis, University of Strathclyde, 1992. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21339.

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The computational analysis of vortex shedding flow is presented, using the commercially available computational fluid dynamics(CFD) software package PHOENICS. In this analysis it is shown how the use of the conventional PHOENICS default first-order hybrid-upwind convective differencing scheme provides an excellent example of the effects of multidimensional false diffusion. These effects are substantially reduced with the introduction of an alternative scheme, SUCCA ( Skew Upwind Corner Convection Algorithm), for the modelling of convective transport in 2D and 3D analyses; resulting in the promotion of continuous vortex shedding for the 2D model. The mechanism of pulsating flow influence on the vortex shedding process has also been simulated. The results show that a complex transient phenomenon such as vortex shedding can be analysed using the PHOENICS code but only with the implementation of an alternative convection algorithm. The results also demonstrate the SUCCA scheme's ability to accurately represent convective transport and hence substantially reduce the effects of multidimensional false diffusion in numerical flow analyses.

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Eesa, Muhammad. "CFD studies of complex fluid flows in pipes". Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/413/.

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The flow of rheologically complex fluids in industrial equipment poses a number of challenges, not least from a modelling point of view. Research is needed to further understand and be able to predict the flow behaviour of such materials and to investigate ways of improving their processing. This work investigates the numerical modelling of complex fluids in three areas: flow and heat transfer under an externally imposed mechanical vibration, and steady-state solid-liquid flows as a first step in extending the vibration studies to these multiphase systems. Validated CFD simulations were used to study the effects of rotational and transversal mechanical vibrations on the pipe flow of viscous non-Newtonian fluids of the power-law, Bingham plastic, and Herschel-Bulkley types. Vibration frequencies in the sonic range of 0-300 Hz and linear amplitudes of 0-4 mm were used. The results showed that rotational and transversal vibrations give rise to substantial enhancements in flow for shear thinning and viscoplastic fluids, while shear thickening fluids experienced flow retardation. The flow enhancement was found to depend on vibration frequency and amplitude, fluid rheological properties, and pressure gradient. These vibrations can be effective at enhancing the flow of low to moderately viscous fluids in industries such as the confectionery industry. For extremely viscous fluids (consistency index ~10 kPa s\(^n\) and yield stress ~200 kPa), ultrasonic frequencies (> 16 kHz) were found to produce orders of magnitude enhancements in flow. These results suggest that vibration can increase the fluidity of highly viscous fluids in industrial applications such as polymer extrusion. Results are also reported for the effects of transversal vibration on heat transfer and temperature uniformity in Newtonian and non-Newtonian shear thinning fluids. Vibration was found to generate sufficient chaotic fluid motion that led to considerable radial mixing which translated into a large enhancement in wall heat transfer as well as a near-uniform radial temperature field. Vibration also caused the temperature profile to develop very rapidly in the axial direction, thus, reducing the thermal entrance length by a large factor, so that much shorter pipes can be used to achieve a desired exit temperature. These effects increased with both vibration frequency and amplitude but were more sensitive to the amplitude. Higher fluid viscosities required larger amplitudes and/or frequencies to achieve substantial temperature uniformity. These results have significant implications for processes where a wide temperature distribution over the pipe cross-section is undesirable as it leads to an uneven distribution of fluid heat treatment, such as in the thermal sterilisation of food products. A numerical study was also conducted of the laminar pipe transport of coarse spherical particles (d = 2-9 mm) in non-Newtonian carrier fluids of the power law type using an Eulerian-Eulerian CFD model. The predicted flow fields were validated by PEPT experimental measurements of particle velocity profiles and passage times, whilst solid-liquid pressure drop was validated using relevant correlations gleaned from the literature. The study was concerned with nearly-neutrally buoyant particles (density ~1020 kg m\(^{-3}\)) flowing in a horizontal or vertical pipe at concentrations up to 40% v/v. The effects of various parameters on the flow properties of such mixtures were investigated over a wide range of conditions. Whilst the effects of varying the power law parameters and the mixture flow rate for shear thinning fluids were relatively small over the range of values considered, particle size and concentration had a significant bearing on the flow regime, the uniformity of the normalised particle radial distribution, the normalised velocity profiles of both phases, and the magnitude of the solid-liquid pressure drop. The maximum particle velocity was always significantly less than twice the mean flow velocity for shear thinning fluids, but it can exceed this value in shear thickening fluids. In vertical down-flow, particles were uniformly distributed over the pipe cross-section, and particle diameter and concentration had little effect on the normalised velocity and concentration profiles. Pressure drop, however, was greatly influenced by particle concentration. These results can help in understanding and predicting the flow behaviour of such solidliquid mixtures in industrial applications, such as the conveying of particulate food suspensions.

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Shaw, Michael James. "An assessment of CFD for transonic fan stability studies". Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709038.

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Ke, Xinyou. "CFD Studies on Mass Transport in Redox Flow Batteries". Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396626452.

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Wang, Zhiguo. "Experimental studies and CFD simulations of conical spouted bed hydrodynamics". Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/61.

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Conical spouted beds have been commonly used for drying suspensions, solutions and pasty materials. They can also be utilized in many other processes, such as catalytic partial oxidation of methane to synthesis gas, coating of tablets, coal gasification and liquefaction, pyrolysis of sawdust or mixtures of wood residues. The main objectives of this work include both the experimental research and mathematical modelling of the conical spouted bed hydrodynamics. For experimental research, pressure transducers and static pressure probes were applied to investigate the evolution of the internal spout and the local static pressure distribution; optical fibre probes were utilized to measure axial particle velocity profiles and voidage profiles; the step tracer injection technique using helium as the tracer and thermal conductivity cells as detectors was used to investigate the gas mixing behaviour inside a conical spouted bed. It was found that many factors might affect calibration of the effective distance of an optical fibre probe. Therefore, a new calibration setup was designed and assembled, and a comprehensive sensitivity analysis was conducted to calibrate the optical probes used in this study. For mathematical modelling, a stream-tube model based on the bed structure inside a conical spouted bed was proposed to simulate partial spouting states. By introducing an adjustable parameter, this model is capable of predicting the total pressure drop under different operating conditions, and estimating axial superficial gas velocity profiles and gauge pressure profiles. A mathematical model based on characteristics of conical spouted beds and the commercial software FLUENT was also developed and validated using measured experimental data. The proposed new CFD model can simulate both stable spouting and partial spouting states, with an adjustable solids-phase source term. At stable spouting states, simulation results agree very well with almost all experimental data, such as static pressure profiles, axial particle velocity profiles, voidage profiles etc. A comprehensive sensitivity analysis was also conducted to investigate the effect of all possible factors on simulation results, including the fluid inlet profile, solid bulk viscosity, frictional viscosity, restitution coefficient, exchange coefficient, and solid phase source term. The proposed new CFD model was also used successfully to simulate gas mixing behaviours inside a conical spouted bed, and simulate cylindrical packed beds as well as cylindrical fluidized beds in one code package.

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Pundi, Ramu Arun Mr. "CFD Studies on the Flow and Shear Stress Distribution of Aneurysms". University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1247820620.

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Abdulkadir, Mukhtar. "Experimental and computational fluid dynamics (CFD) studies of gas-liquid flow in bends". Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12218/.

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Within the oil industry there is a need to measure and predict the form of the multiphase liquid and gas flows that are present within oil production and processing pipelines. Knowledge of the flow regimes present allows the engineer to optimise the configuration of the pipeline and downstream processes to achieve the most, economic and reliable design. The applications of these technologies are collectively known as flow assurance. Within oil production systems, one component which has received little attention is the characterisation of the multiphase flow around bends under various process conditions. To predict the flow regimes in greater details requires the development of instrumentation that can measure and characterise the flow within the pipes. To circumvent this challenge, two experimental investigations were carried out in two rigs available in the Chemical and Environmental Engineering Laboratories at the University of Nottingham. These are: (1) a 67 mm internal diameter pipe joined to a 90o bend, in which air/silicone oil flows were investigated using advanced instrumentation: Electrical Capacitance Tomography (ECT), Wire Mesh Sensor Tomography (WMS), and high-speed video. The first two provide time and cross-sectionally resolved data on void fraction. The ECT probes were mounted 10 diameters upstream of the bend whilst the WMS was positioned either immediately upstream or immediately downstream of the bend. The downstream pipe was maintained horizontal whilst the upstream pipe was mounted either vertically or horizontally. The bend (R/D = 2.3) was made of transparent acrylic resin. The superficial velocities of the air ranged from 0.05 to 4.73 ms-1 and for the silicone oil from 0.05 to 0.38 ms-1. (2) a 127 mm internal diameter riser joined to a vertical 180o bend, in which measurements of film fraction and liquid film thickness distribution for an air-water system were obtained using the electrical conductance technique. The former was measured using the ring conductance probes placed 17 and 21 diameters, respectively upstream and downstream of the bend, 45o, 90o and 135o within the bend. The latter were obtained using pin and parallel wire probes. The pin probes were used for thin films measurement whilst the parallel wire probes for thick films. The bend, made of transparent acrylic resin, has a curvature ratio (R/D = 3). The superficial velocities of the air ranged from 3.5 to 16.1 ms-1 and for the water from 0.02 to 0.2 ms-1. The experimental results for the 90o bend study reveal that bubble/spherical cap bubble, slug, unstable slug and churn flows were observed before the bend for the vertical pipe and plug, slug, stratified wavy and annular flows when the pipe was horizontal. Bubble, stratified wavy, slug, semi-annular and annular flows are seen after the bend for the vertical 90o bend, the flow patterns remained the same as before the horizontal 90o bend. These results were confirmed by the high-speed videos taken around the bend. For the vertical 180o return bend, the average film fraction was identified to be higher in straight pipes than in bends. For low liquid and higher gas flow rates, due to the action of gravity drainage, film breakdown occurs at the 45o bend. A previously proposed criterion, to determine stratification after the 90o bend, based on a modified Froude number have been shown to be valid for a liquid different from that tested in the original paper. Similarly, for the 180o return bend, the condition for which the liquid goes either to the inside or outside of the bend are identified based on published material. Variations between average liquid film thickness and bend angles are reported for the vertical 180o bend. Contrary to the conclusions reached by Hills (1973) and Anderson and Hills (1974), the liquid film thickness becomes annular flow in the 180o bend at low liquid flow rates and stratified flow at higher liquid superficial velocities. In addition, a CFD code has been used to successfully model the hydrodynamics of the slug flow pattern in a riser and vertical 90o bend, using the Volume of Fluid model based on the Eulerian approach, implemented in the commercial CFD package Star-CCM+. The modelling results are validated with the experiments and also provide more detailed information on the flow such as the velocity field.

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Kurniawan, K. P. "Studies of fundamental process occurring in precalciners and cyclone preheater tower using CFD". Thesis, Cardiff University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531015.

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Birkby, Paul. "Numerical studies of reacting and non-reacting underexpanded sonic jets". Thesis, Loughborough University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297581.

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Salgado-Ayala, Rodrigo. "Studies of flow and scalar distribution in two large industrial environments". Thesis, University of Bristol, 2000. http://hdl.handle.net/1983/f2aa1bf4-08f4-41cb-a6e0-d2641c01e222.

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Libros sobre el tema "CFD STUDIES"

G, Tucker Paul y National Agency for Finite Element Methods and Standards., eds. NAFEMS International Journal of CFD case studies. Glasgow: NAFEMS, 1998.

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C, Wang Peter C., Automation Technology Institute (Pebble Beach, Calif.) y Symposium on Automation Technology (1985 : Monterey, Calif.), eds. Advances in CAD/CAM workstations: Case studies. Boston: Kluwer Academic Publishers, 1986.

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Wang, Peter Cheng-Chao. Advances in CAD/CAM Workstations: Case Studies. Boston, MA: Springer US, 1986.

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Conners, M. Elizabeth. Pacific cod pot studies 2002-2003. Seattle, WA: National Marine Fisheries Service, Alaska Fisheries Science Center, 2004.

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Held, Martin. Geometric and algorithmic studies in computer-aided design and manufacturing. Wien: Österreichische Computer Gesellschaft, 1998.

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Chalmers, Malcolm. Reciprocal unilateralism as a complement to CFE: Two studies. Mosbach: AFES-PRESS, 1990.

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Magalakwe, Monageng. A study of local institutions in Boteti CFDA. [Gaborone, Botswana]: Applied Research Unit, Ministry of Local Government and Lands, 1987.

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Le réformisme assumé de la CFDT. Paris: Presses de la Fondation natinale de Sciences Politiques, 2012.

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Hart, Thomas R. Studies on the Cantar de mio Cid. London: Dept. of HIspanic Studies, Queen Mary, University of London, 2006.

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D, Deyermond A., Pattison D. G y Southworth Eric, eds. 'Mio Cid' Studies: ‘Some Problems of the Diplomatic’ Fifty Years On. London: Department of Hispanic Studies, Queen Mary, University of London, 2002.

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Capítulos de libros sobre el tema "CFD STUDIES"

Srinivasan, Seshasai y M. Ziad Saghir. "CFD Studies in Thermodiffusion". En Thermodiffusion in Multicomponent Mixtures, 65–76. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5599-8_4.

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Guellouz, Mohamed Sadok, Kaouther Ghachem, Abdelmajid Jemni y Maher Ben Chiekh. "CFD Aided Design: Case Studies". En Energy and Exergy for Sustainable and Clean Environment, Volume 2, 449–68. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8274-2_30.

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Deshmukh, Ajinkya N., Rahul S. Pawar, Sourabh S. Kulkarni, Vikas Kumar, Sandeep K. Joshi y Mangesh B. Chaudhari. "CFD Simulation Studies of High Performance Computing (HPC) Facilities". En Fluid Mechanics and Fluid Power – Contemporary Research, 251–67. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_25.

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Gorai, Somenath y Sarit K. Das. "Studies on Mixed Convection and Its Transition to Turbulence—A Review". En 50 Years of CFD in Engineering Sciences, 317–61. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2670-1_10.

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Cheng, H. K. "Transonic Equivalence Rule: Unresolved Aspects of Asymptotic and CFD Studies". En Symposium Transsonicum III, 179–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83584-1_15.

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Raman, Rupak Kumar, R. Srinivasa Rao, Kannan N. Iyer, A. J. Gaikwad y L. R. Bishnoi. "Hydrogen Distribution and Mitigation Studies in Nuclear Reactor Containment Using CFD". En Handbook of Multiphase Flow Science and Technology, 1–74. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-4585-86-6_52-1.

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Babanezhad, Meisam y Iman Behroyan. "Applications and Performance of Fuzzy Differential Evolution (DEFIS) in CFD Modeling of Heat and Mass Transfer". En Studies in Computational Intelligence, 367–81. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8082-3_14.

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Ishida, Fujimaro, Masanori Tsuji, Satoru Tanioka, Katsuhiro Tanaka, Shinichi Yoshimura y Hidenori Suzuki. "Computational Fluid Dynamics for Cerebral Aneurysms in Clinical Settings". En Acta Neurochirurgica Supplement, 27–32. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63453-7_4.

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AbstractHemodynamics is thought to play an important role in the pathogenesis of cerebral aneurysms and recent development of computer technology makes it possible to simulate blood flow using high-resolution 3D images within several hours. A lot of studies of computational fluid dynamics (CFD) for cerebral aneurysms were reported; therefore, application of CFD for cerebral aneurysms in clinical settings is reviewed in this article.CFD for cerebral aneurysms using a patient-specific geometry model was first reported in 2003 and it has been revealing that hemodynamics brings a certain contribution to understanding aneurysm pathology, including initiation, growth and rupture. Based on the knowledge of the state-of-the-art techniques, this review treats the decision-making process for using CFD in several clinical settings. We introduce our CFD procedure using digital imaging and communication in medicine (DICOM) datasets of 3D CT angiography or 3D rotational angiography. In addition, we review rupture status, hyperplastic remodeling of aneurysm wall, and recurrence of coiled aneurysms using the hemodynamic parameters such as wall shear stress (WSS), oscillatory shear index (OSI), aneurysmal inflow rate coefficient (AIRC), and residual flow volume (RFV).

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Goldstein, Ken y John Divelbiss. "Design of Cleanroom Airflows for Particle Control Using CFD Analysis: Case Studies". En Particles in Gases and Liquids 3, 171–87. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1187-2_12.

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Junaidi, Md Abdul Raheem, Gourabh Pandey, K. Ram Chandra Murthy y Y. V. Daseswara Rao. "CFD Studies on the Modified Laparoscopic Instrument Used in Minimally Invasive Surgeries". En Lecture Notes in Mechanical Engineering, 643–51. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0159-0_56.

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Actas de conferencias sobre el tema "CFD STUDIES"

Deshpande, Alok y Jeevan Jaidi. "CFD STUDIES OF FLAMELESS COMBUSTION". En Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017). Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihmtc-2017.1580.

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Carrion, Marina, Massimo Biava, Rene Steijl, George N. Barakos y David Stewart. "CFD Studies of Hybrid Air Vehicles". En 54th AIAA Aerospace Sciences Meeting. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-0059.

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Purimetla, Anil K., Jie Cui, Stephen Idem y Sastry Munukutla. "CFD Studies on Burner Secondary Air Flow". En ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61914.

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In many fossil power plants operating today, there is insufficient means to assure the proper balancing of the secondary airflows between the individual burners of wall-fired units in addition there is a problem of dust deposition on the floor. This mismatch leads to decreased boiler efficiency and increased emissions. In this study, a Computational Fluid Dynamics (CFD) modeling of a fossil power plant wind box scale model is performed using the commercial software CFX5.6. The model solves the three dimensional Reynolds averaged Navier-Stokes equations with the K-epsilon turbulence model. The CFD results are validated by the experimental data taken from a 1/8th scale model of a wall fired fossil unit. Simulations under various flow conditions are obtained to identify the optimum design in terms of the equalization of the secondary airflow through the burners.

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Rosen, Bruce, Joseph Laiosa y Warren Davis, Jr. "CFD design studies for America's Cup 2000". En 18th Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-4339.

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Thomas, Mitra, Benjamin Kirollos, Dougal Jackson y Thomas Povey. "Experimental and CFD Studies of NGV Endwall Cooling". En ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95639.

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For engines operating at high turbine entry temperatures it is increasingly important to cool the high pressure nozzle guide vane (HP NGV) endwalls. This is particularly so for low NOx combustors operating with flatter outlet temperature distributions. Double-row arrangements of film/ballistic cooling holes upstream of the NGV passage have been employed in production engines. Optimisation of such systems is non-trivial, however, due to the complex nature of the flow in the endwall region. Previous studies have reported that strong cross passage pressure gradients lead to migration of coolant flow and boundary layer flow within the passage. In addition the vane potential field effects lead to non-uniform blowing ratios for holes upstream of the vanes. It has also been reported that inlet total pressure and turbulence profiles have a significant effect on the development of the film cooling layer. In this study, endwall film cooling flows are studied experimentally in a large-scale low-speed cascade tunnel with engine-realistic combustor geometry and turbulence profiles. At very low blowing ratios mild cross-passage migration effects are observed. At higher blowing ratios more realistic of the engine situation no cross-passage migration is observed. This finding is somewhat contrary to the classical view of endwall secondary flow, which is presented as significant at the scale of the vane passage by several authors. The difference arises in part because of the thinning of the boundary layer due to strong acceleration in the vane inlet contraction. The findings are further supported by CFD simulations. Methods of improving conventional double-row systems to offer improved cooling of the endwall are also discussed.

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Zhu, Shangxiang y Yuxin Qui. "CFD Studies on Aerodynamic Features of Zhu's Flap". En 24th AIAA Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-3848.

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Rogers, Stuart, Michael Aftosmis, Shishir Pandya, Neal Chaderjian, Edward Tejnil y Jasim Ahmad. "Automated CFD Parameter Studies on Distributed Parallel Computers". En 16th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-4229.

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Stovin, Virginia R., John P. Grimm, Adrian P. Buxton y Simon J. Tait. "Parametric Studies on CFD Models of Sewerage Structures". En Ninth International Conference on Urban Drainage (9ICUD). Reston, VA: American Society of Civil Engineers, 2002. http://dx.doi.org/10.1061/40644(2002)312.

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Hawkes, G. S., R. M. Scott, A. Payne y S. J. Rees. "Enhancement of Marine Craft Design Through the CFMS Programme: Studies on the Effect of Meshing Techniques and Solver Discretisation on Solution Fidelity and Computational Cost". En Marine CFD 2008. RINA, 2008. http://dx.doi.org/10.3940/rina.cfd.2008.08.

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Bussoletti, J., J. Huffington, A. Krynytsky, G. Saaris, J. Bussoletti, J. Huffington, A. Krynytsky y G. Saaris. "CFD studies in support of NWTC test section design". En 35th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-96.

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Informes sobre el tema "CFD STUDIES"

D. M. McEligot y G. E. McCreery. Scaling studies and conceptual experiment designs for NGNP CFD assessment. Office of Scientific and Technical Information (OSTI), noviembre de 2004. http://dx.doi.org/10.2172/911231.

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Smith, Thomas Michael, John N. Shadid, Roger P. Pawlowski, Eric C. Cyr y Timothy Michael Wildey. Thermal hydraulic simulations, error estimation and parameter sensitivity studies in Drekar::CFD. Office of Scientific and Technical Information (OSTI), enero de 2014. http://dx.doi.org/10.2172/1204072.

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Rakowski, Cynthia L., John A. Serkowski y Marshall C. Richmond. Bonneville Powerhouse 2 Fish Guidance Efficiency Studies: CFD Model of the Forebay. Office of Scientific and Technical Information (OSTI), julio de 2012. http://dx.doi.org/10.2172/1059042.

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Hassan, Yassin y Nk Anand. Experimental and CFD Studies of Coolant Flow Mixing within Scaled Models of the Upper and Lower Plenums of NGNP Gas-Cooled Reactors. Office of Scientific and Technical Information (OSTI), marzo de 2016. http://dx.doi.org/10.2172/1253943.

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Michalski, A,, D. Andersson, R. Rossi y C. Soriano. D7.1 DELIVERY OF GEOMETRY AND COMPUTATIONAL MODEL. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.020.

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This document describes the industrial application, on which the developments of the project are implemented, and the CFD set-up. The developments are implemented over six analysis cases with increasing complexity starting from a 2D geometry with mean wind inflow to a 3D geometry with turbulent inflow and real-time shape optimization. The application represents the CAARC tall building model, which has served as a benchmark model for many studies since the 1970’s when it was first developed. Base moments (bending and torsional moments) of the building are extracted for validation by comparison of the results with the benchmark study. Page 3 of 19 Deliverable 7.1

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Badia, S., A. Martín, J. Principe, C. Soriano y R. Rossi. D3.1 Report on nonlinear domain decomposition preconditioners and release of the solvers. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.021.

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Haehnel, Robert, Scott Christensen, J. Whitlow, Andrew Bauer, Ari Meyer, Gautham Rangarajan, Yonghu Wenren et al. A computational prototyping environment interface for DoD CREATE™-AV Helios simulations. Engineer Research and Development Center (U.S.), mayo de 2021. http://dx.doi.org/10.21079/11681/40582.

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Computational Prototyping Environment (CPE) is a web-based portal designed to simplify running Department of Defense (DoD) modeling and simulation tools on the DoD Supercomputing Resource Center’s (DSRC) High Performance Computing (HPC) systems. The first of these tools to be deployed in the CPE is an application (app) to conduct parametric studies and view results using the CREATE-AV Helios CFD software. Initial capability includes hover (collective sweep) and forward flight (speed sweep) performance calculations. The CPE Helios app allows for job submission to a DSRC’s HPC system and for the viewing of results created by Helios, i.e., time series and volumetric data. Example data input and results viewing are presented. Planned future functionality is also outlined.

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Wei, Dongmei, Yang Sun y Rongtao Chen. Risk prediction model for ISR after coronary stenting-a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, abril de 2023. http://dx.doi.org/10.37766/inplasy2023.4.0014.

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Review question / Objective: The efficacy of risk prediction model for ISR. Condition being studied: Coronary heart disease (CHD), with high morbidity and high mortality rate, is still a serious public health concern around the world. PCI is fast becoming a key instrument in revascularization for patients with CHD, as well as an important technology in the management of CHD patients.1 Although the clinical application of coronary stents brought about a dramatic improvement in patients’ clinical and procedural outcomes, the mid-and long-term outcome of stent implantation remains significantly hampered by the risk of developing ISR with a prevalence rate of 3–20% over time. Predictive models have the advantage of formally combining risk factors to allow more accurate risk estimation. And it is essential to establish a model to predict ISR in patients with CAD and drug-eluting stents (DESs) implantation.However, predictive model performance needs further evaluation.

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Zhang, Ruizhe y Qingya Xie. A meta-analysis of cholesteryl ester transfer protein(CETP) gene rs708272(G>A) polymorphism in association with cornoary heart disease risk. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, junio de 2023. http://dx.doi.org/10.37766/inplasy2023.6.0021.

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Review question / Objective: To seek the association of the CETP rs708272 polymorphism with CHD.To figure out if the carriers of allele rs708272-A reduce or increase the risk of CHD in comparison with carriers of allele rs708272-G under allele model, dominant model and recessive model. Condition being studied: The inclusion criteria of CHD:(1)the presence of stenosis≥50% in a minimum of one main segment of coronary arteries (the right coronary artery, left circumfex, or left anterior descending arteries) by coronary angiography.(2) symptoms representing angina pectoris, electrocardiographic changes, and elevations of cardiac enzymes based on the criteria of the World Health Organization. (3) a certifed record of coronary artery bypass graft or percutaneous coronary intervention were included in the study.The exclusion criteria of CHD :patients with congenital heart disease, cardiomyopathy, and valvular disease.Controls:the same populations as the cases and specifed to be without CAD, cardiovascular and cerebrovascular diseases, and peripheral atherosclerotic arterial disease.

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Matthew Jones, Bob Kephart y and Rick Vidal. Tevatron bunch length studies at CDF. Office of Scientific and Technical Information (OSTI), mayo de 2002. http://dx.doi.org/10.2172/794464.

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