Dissertations / Theses on the topic 'Numerical slar radiation model'
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Maggiorano, Anna. "Solar radiation penetration in biogeochemical model of the coastal ocean. Numerical experiments." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13542/.
Full textFan, Xiaobing 1960. "Numerical model for calculating the ultrasonic power deposition in layered medium." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278188.
Full textStancil, Maurice Marcus. "Creation and Experimental Validation of a Numerical Model of a Michelson Interferometer." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/74957.
Full textMaster of Science
Mahee, Durude. "Numerical Simulation and Graphical Illustration of Ionization by Charged Particles as a Tool toward Understanding Biological Effects of Ionizing Radiation." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535381068931831.
Full textSang, W. M. "A search for the Standard Model Higgs boson using the OPAL detector at LEP." Thesis, Brunel University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340840.
Full textWang, Ying. "Numerical study of a confined thermal plume at different flow regimes under the influence of gas radiation." Thesis, La Rochelle, 2020. http://www.theses.fr/2020LAROS005.
Full textThis work presents a numerical investigation of a confined thermal plume under the influence of gas radiation. Plumeflow is generated by a linear heat source of constant power density immersed in a cubic cavity. The main aim of this thesis is to characterize the evolution of the plume throughout its transition from steady-state to turbulent regime, and to explore the gas radiation effects on flow stability, heat transfers, thermal and kinetic fields of the plume. DNS numerical simulations are performed over a Rayleigh number range from 106 to 109 by applying a finite volume CFD software coupled to a module for radiative heat transfer calculations. The pure convective situation is studied first to characterize the thermal and kinetic fields of the plume in different flow regimes. Next, the convection-radiation coupling is introduced by considering either gray gas or real gas (air - H2O mixture) media. The effects of optical thickness are analyzed in details for gray gas model. Results show that gas radiation stabilizes the plume flow and delays the onset of unsteadiness. Gas radiation also homogenizes the thermal field and reduces its spatial spreading. However, radiation effect on the kinetic field depends on the flow state. For steady state, gas radiation decreases the global flow circulation while for transient and turbulent states, it enhances the flow dynamics in optically thin medium.These general trends of radiation are also confirmed in real gas mixture through a parametric study of water vapor concentration and reference temperature
Schomburg, Annika [Verfasser]. "Improving the simulation of small-scale variability in radiation and land-surface parameterizations in a mesoscale numerical weather prediction model / Annika Schomburg. Mathematisch-Naturwissenschaftliche Fakultät." Bonn : Universitäts- und Landesbibliothek Bonn, 2011. http://d-nb.info/1016198094/34.
Full textBhardwaj, Shubhendu. "Hybrid Numerical Models for Fast Design of Terahertz Plasmonic Devices." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500336630858748.
Full textLu, Xijia. "An Applied Numerical Simulation of Entrained-Flow Coal Gasification with Improved Sub-models." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1696.
Full textLoussouarn, Thomas. "Maîtrise de la thermique des fours de maintien en fonderie." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0105.
Full textVacuum holding induction furnaces are used for the manufacturing of turbine blades by loss wax foundry process. Heat transfer control in a holding furnace is crucial to ensure the quality of manufacturing. This work has 3 major parts, which are the detailed modelling, reduced modelling and experiments. An axyisymmetric furnace and its load have been numerically modelled using FlexPDE and COMSOL Multiphysics, finite element codes. Modelling takes as inputs the electric power consumed by inductors and gives the temperature field in the heating module. The studied reduced models are phyisical convolutive models (enthalpic (0D), 1 dimension analytical (1D)) and parametric like AutoRegressive with eXogeneous inputs (ARX). ARX models have been compared to convolutive models (identification, validation). The goal is to get temperatures in the heating module without local presence of physical sensors (virtual sensor). Detailed and reduced models have been compared to experiments on the furnace. This last part is not described in this document
Merino, Luis. "Modélisation du rayonnement solaire pour la simulation thermique en milieu urbain." Thesis, Compiègne, 2013. http://www.theses.fr/2013COMP2115.
Full textSolar irradiation is the most important parameter for building thermal simulation. Its calculation requires geometrical relationships for the direct radiation from the Sun and a sky model to distribute the radiance over the sky vault. Sky models developed for solar collectors are used to calculate the building’s solar irradiation availability. Some software calculates building’s irradiation by adapting sky models for lighting simulations. These models allow to compute solar irradiation, but the selection of the most suitable model for urban applications has not been defined clearly enough. We developed a code, based on the study of numerical methods, sky models and the necessary meteorological data. It calculates the solar irradiation availability in the urban context. The novelty lies in its capacity to evaluate the solar irradiation from the Sun and the sky by using three sky models: one isotropic and two anisotropic. The interaction between each sky model and the urban context is made clear in a series of progressively more complex geometric examples. Procedures to partition the sky vault are presented.Differences between the predicted irradiance by the anisotropic models (Perez punctual source and Perez All-Weather) are classified as small and large in unobstructed and obstructed scenes respectively. Contributions have also been made to set up a meteorological station. Statistical analyses as well as quality control procedures of meteorological data were also implemented
Souayfane, Farah. "Modèle simplifié de changement de phase en présence de convection et rayonnement : application à un mur translucide associant superisolation et stockage d'énergie thermiques." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4043/document.
Full textThis thesis aims to study the exploitation of solar radiation thanks to a new concept of passive sensor wall. In this context, the thermal behavior of a novel semi-transparent solar wall has been studied. The wall is composed of glazing, silica aerogel (TIM) and glass bricks filled with fatty acids (PCM). This wall provides storage and restitution of heat, thermal-acoustic insulation and daylighting. The thermal performance of the TIM-PCM wall is tested in a full-sized test cell located in Sophia, PERSEE center. In winter, particularly in sunny cold days, the PCM absorbs solar radiation, melts, and then releases the stored heat to the building at night. During summer, overheating is encountered, the PCM remains in its liquid state and is unable to release the stored heat. A simplified model for PCM melting in presence of natural convection and radiation is developed and validated using a CFD model, and benchmark solutions. Then, a numerical model describing the heat transfer mechanisms through the wall is developed. This model is linked to TRNSYS to assess the thermal performance of the whole building. The MATLAB-TRNSYS model is then validated experimentally. The thermal behavior of the wall is tested under different climates, and passive solutions are proposed to ensure thermal comfort in summer. Finally, the validated model is used to study the annual thermal behavior of a building integrating TIM-PCM wall and an economic study is conducted. These studies confirm the interest of the wall vis-à-vis the improvement of energy performance of the building. The economic feasibility of applying the TIM-PCM wall depends mainly on climate, energy costs, and investment cost
Leonet, Véronique Madeleine. "Participation à la coopération de méthodes de modélisation : application au calcul vibroacoustique." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10159.
Full textLow, Zi Kang. "Matériaux cellulaires isolants haute température : Relation microstructure-propriétés." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI122.
Full textThis CIFRE doctoral study, performed in collaboration with Saint-Gobain Research Provence, aims to model the thermal properties of NorFoam XPure®, an alumina foam designed for high temperature thermal insulation (1200°C–1700°C). The goal is to develop and validate multiscale numerical models to compute the conductive and radiative heat transfer through the foam from 3D tomography-reconstructed microstructures and the intrinsic properties of each constituent phase. Specific attention is given to the complex porosity in the studied foam: in addition to the open-cell network, smaller pores are also found within the foam skeleton. Novel approaches are proposed in the present work to take into account the influence of this dual-scale porosity. Firstly, effective heat conduction through the foam is modeled with finite element homogenization techniques. It is demonstrated that the commonly used periodic boundary conditions are unsuitable for tomography-reconstructed foams, and that a set of mixed boundary conditions gives more accurate and precise results for such foams. As radiative transfer through the porous foam skeleton is characterized by high volume scattering and significant wave effects, a novel physical optics approach based on the discrete dipole approximation is next developed to model the influence of these phenomena. The radiative properties of the foam are then determined through a ray tracing method that takes into account the complex radiative behavior of the porous foam skeleton. The influence of non-specular reflection and refraction at the interfaces between the foam cells and skeleton is studied. Finally, the homogenized properties are applied to simulate the coupled conductive and radiative heat transfer through the foam. The model predictions are systematically compared to thermal and spectroscopic measurements performed on samples of the foam and the foam skeleton material. The good agreement between numerical and experimental results confirms the predictive capabilities of the models developed in this study
Zein, Waël. "Etude d'un capteur absorbant l'energie solaire par le fluide caloporteur : application au chauffage des piscines de plein-air." Poitiers, 1986. http://www.theses.fr/1986POIT2289.
Full textMargerit, Jonathan. "Modélisation et Simulations Numériques de la Propagation de Feux de Forêts." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 1998. http://tel.archives-ouvertes.fr/tel-00003730.
Full textBASSI, NICCOLO'. "The “Green Wall Panel” Characterization and optimization of a disposable flat panel reactors." Doctoral thesis, 2010. http://hdl.handle.net/2158/547864.
Full textCastro, Joseph P. "Numerical model of passive current drive via synchrotron radiation." 1995. http://catalog.hathitrust.org/api/volumes/oclc/34405258.html.
Full textTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 125-126).
Hung, Cheng-Yen, and 洪正彥. "The Study of Perforated-Plate Burner and Analysis of Radiation Efficiency by Using Numerical Model." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/tb85fy.
Full text國立中山大學
機械與機電工程學系研究所
103
In this study, established a two dimensional CFD model with orthogonal mesh to simulate the combustion phenomenon of methane-air mixture gas in the radiation combustor. The combustion chamber of this model which consists of a cellular array was simplified to modeling flame propagation inside a channel, and therefore parameters effects of flame ignited location and efficiency of this combustor has been discussed. Using ANSYS FLUENT and user-defined function (UDF) to simulate flame propagating and heat radiation, and using DO model of ANSYS FLUENT to simulate surfaces emissivity. In this study, considering methane and air stoichiometric combustion modeled by a simple one-step irreversible reaction The results reveal that increase of thermal conductivity results in the increase of adiabatic flame propagating speed and temperature, and thus flame propagats to upstream side. However, when thermal conductivity greater than 20 W/m-K, it was limited for the effects of thermal conductivity to increasing adiabatic flame temperature. If the inlet fuel velocity increase, it needs longer distance to achieve 100% fuel consumption. Flame propagating to the downstream side heats the methane-air mixture gas closed to the downstream side, increases downstream radiation heat flux , reduces radiation heat loss flux to the environment of upstream side and results in worse combustion efficiency. With certain equivalence ratio, at the limit fuel inlet velocity, it causes the maximum adiabatic temperature, but with large solid thermal conductivity it can employ wide range of fuel inlet velocity. With case of large equivalence ratio, adiabatic flame speed and temperature, it needs a shorter distance to achieve 100% fuel consumption, also leads to flame propagate to the upstream side and increases the radiation heat loss. Downstream radiation heat efficiency would increase with increasing perforated-plate internal emissivity. Overall, using a combustor which consists of lower equivalence ratio, lower fuel inlet velocity, lower perforated-plate conductivity, and higher perforated-plate internal emissivity,will gain better radiation heat efficiency.
O'Connor, Janna Elizabeth Zou Xiaolei. "A quality control procedure for assimilating AIRS radiance data into a mesoscale model." Diss., 2006. http://etd.lib.fsu.edu/theses/available/04072006-174131.
Full textAdvisor: Xiaolei Zou, Florida State University, College of Arts and Sciences, Dept. of Meteorology. Title and description from dissertation home page (viewed June 13, 2006). Document formatted into pages; containsxi, 65 pages. Includes bibliographical references.
Wolf, Kevin. "Evaluation of the Radiation Scheme of a Numerical Weather Prediction Model by Airborne Measurements of Spectral Irradiance above Clouds." 2019. https://ul.qucosa.de/id/qucosa%3A70582.
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