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Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19最新文献

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CO2 RADIATION IN EXPANDING FLOWS UNDER VIBRATIONAL NON-EQUILIBRIUM CONDITIONS 振动非平衡条件下膨胀流中的Co2辐射
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 2019-06-03 DOI: 10.1615/RAD-19.490
Quentin Binauld, P. Riviere, A. Soufiani
{"title":"CO2 RADIATION IN EXPANDING FLOWS UNDER VIBRATIONAL NON-EQUILIBRIUM CONDITIONS","authors":"Quentin Binauld, P. Riviere, A. Soufiani","doi":"10.1615/RAD-19.490","DOIUrl":"https://doi.org/10.1615/RAD-19.490","url":null,"abstract":"ABSTRACT. The aim of this paper is to develop a line by line model for CO2 vibrational non- equilibrium radiation and to investigate non-equilibrium effects in the case of an expanding mixture flow in a simple conical nozzle. A vibrational specific collisional relaxation model is developed and is incorporated in a multi-temperature thermodynamic description of the gas mixture, in order to compute vibrational level populations along the expanding flow. The HITEMP-2010 spectroscopic database is employed with a model for level energy splitting to provide line by line absorption and emission total and per-vibrational mode specific spectra. The specific spectra allow us to derive the radiative source terms to be used in the multi-temperature model if a coupled approach is required. It is shown that, for the considered nozzle conditions, the partial freeze of vibrational excitation in the expanding flow increases significantly the radiative intensity escaping from the mixture.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115867146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TOWARD THE USE OF SYMBOLIC MONTE CARLO FOR CONDUCTION-RADIATION COUPLING IN COMPLEX GEOMETRIES 符号蒙特卡罗在复杂几何中用于传导-辐射耦合的研究
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 2019-06-03 DOI: 10.1615/RAD-19.380
L. Penazzi, S. Blanco, C. Caliot, C. Coustet, Mouna El-Hafi, R. Fournier, M. Galtier, L. Ibarrart, M. Roger
{"title":"TOWARD THE USE OF SYMBOLIC MONTE CARLO FOR CONDUCTION-RADIATION COUPLING IN COMPLEX GEOMETRIES","authors":"L. Penazzi, S. Blanco, C. Caliot, C. Coustet, Mouna El-Hafi, R. Fournier, M. Galtier, L. Ibarrart, M. Roger","doi":"10.1615/RAD-19.380","DOIUrl":"https://doi.org/10.1615/RAD-19.380","url":null,"abstract":"We address the interest of using Symbolic Monte Carlo to obtain a reduced model for conduction-radiation coupling in complex geometries. Symbolic Monte Carlo was successfully used for radiative transfer in a decoupled manner, but no attempt has yet been reported to extend its use to radiation coupled with other modes. Here we show that from a unique Monte Carlo simulation of radiation coupled with conduction in a semi-transparent solid surrounded by a convective flow, it is possible to build a formulation of the local temperature as function of the convective heat trans- fer coefficient, for instance, including the evaluation of uncertainty. This reduced model (a transfer function) enables to decrease the computation time when the function needs to be evaluated plenty of times for different values of the parameters as in optimization or control algorithms.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116602833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
IDENTIFICATION OF RADIATIVE PROPERTIES OF A QUARTZEL SAMPLE BASED ON SYMBOLIC MONTE CARLO METHODS 基于符号蒙特卡罗方法的石英样品辐射特性识别
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 2019-06-03 DOI: 10.1615/RAD-19.250
Yassine Maanane, M. Roger, A. Delmas, M. Galtier, F. André
{"title":"IDENTIFICATION OF RADIATIVE PROPERTIES OF A QUARTZEL SAMPLE BASED ON SYMBOLIC MONTE CARLO METHODS","authors":"Yassine Maanane, M. Roger, A. Delmas, M. Galtier, F. André","doi":"10.1615/RAD-19.250","DOIUrl":"https://doi.org/10.1615/RAD-19.250","url":null,"abstract":"","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115175375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
MONTE-CARLO AND DOMAIN-DEFORMATION SENSITIVITIES 蒙特卡罗和区域变形灵敏度
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 2019-06-03 DOI: 10.1615/RAD-19.260
P. Lapeyre, S. Blanco, C. Caliot, J. Dauchet, Mouna El-Hafi, R. Fournier, O. Farges, M. Roger
{"title":"MONTE-CARLO AND DOMAIN-DEFORMATION SENSITIVITIES","authors":"P. Lapeyre, S. Blanco, C. Caliot, J. Dauchet, Mouna El-Hafi, R. Fournier, O. Farges, M. Roger","doi":"10.1615/RAD-19.260","DOIUrl":"https://doi.org/10.1615/RAD-19.260","url":null,"abstract":"We address the question of evaluating shape derivatives of objective functions for radiative-transfer engineering involving semi-transparent media. After recalling the standard Monte-Carlo approach to sensitivity estimation and its current limitations, a new method is presented for the specific case of geometrical sensitivities. This method is then tested in a square cavity filled by a multiple-scattering and absorbing (non-emitting) semi-transparent medium, irradiated by an emissive cylinder. A new geometrical sensitivity algorithm is presented with full genericity in order to allow its future implementation in complex geometries.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127737368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
VALIDITY OF KINETIC THEORY FOR RADIATIVE HEAT TRANSFER IN NANOPARTICLE CHAINS 纳米颗粒链辐射传热动力学理论的有效性
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 2019-01-29 DOI: 10.1615/rad-19.400
Eric J. Tervo, B. Cola, Zhuomin M. Zhang
{"title":"VALIDITY OF KINETIC THEORY FOR RADIATIVE HEAT TRANSFER IN NANOPARTICLE CHAINS","authors":"Eric J. Tervo, B. Cola, Zhuomin M. Zhang","doi":"10.1615/rad-19.400","DOIUrl":"https://doi.org/10.1615/rad-19.400","url":null,"abstract":"In chains of closely-spaced nanoparticles supporting surface polaritons, near-field electromagnetic coupling leads to collective effects and super-Planckian thermal radiation exchange. Researchers have primarily used two analytical approaches to calculate radiative heat transfer in these systems: fluctuational electrodynamics, which directly incorporates fluctuating thermal currents into Maxwell's equations, and a kinetic approach where the dispersion relation provides modes and propagation lengths for the Boltzmann transport equation. Here, we compare results from the two approaches in order to identify regimes in which kinetic theory is valid and to explain differing results in the literature on its validity. Using both methods, we calculate the diffusive radiative thermal conductivity of nanoparticle chains. We show that kinetic theory is valid and matches predictions by fluctuational electrodynamics when the propagation lengths are greater than the particle spacing.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125392645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
MODELING THE FLASH METHOD BY USING A CONDUCTO-RADIATIVE MONTE CARLO ALGORITHM : APPLICATION TO POROUS MEDIA 用传导辐射蒙特卡罗算法模拟闪蒸方法:在多孔介质中的应用
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/rad-19.390
M. Sans, O. Farges, V. Schick, C. Moyne, G. Parent
{"title":"MODELING THE FLASH METHOD BY USING A CONDUCTO-RADIATIVE MONTE CARLO ALGORITHM : APPLICATION TO POROUS MEDIA","authors":"M. Sans, O. Farges, V. Schick, C. Moyne, G. Parent","doi":"10.1615/rad-19.390","DOIUrl":"https://doi.org/10.1615/rad-19.390","url":null,"abstract":"In the following paper, both conduction and radiation heat transfer were explored with a Monte-Carlo method applied to a complex geometry. The algorithm accounted for the coupling of conduction in the solid phase and radiation through the void phase and is used for direct simulation of a flash method. This allowed us to evaluate the effective total conductivity of the equivalent homogenized medium in function of a wide range of thermal, optical and geometric properties. The influence of the hemispherical emissivity of the struts material, the porosity and the diameter of the cells are investigated. Moreover, this procedure appears to be a useful tool to confirm whether or not the assumption of the diffuse radiation (Rosseland) is valid.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
ASSESSMENT OF A MODEL FOR SUBGRID-SCALE TURBULENCE-RADIATION INTERACTION APPLIED TO THE SCALED SANDIA FLAME D 亚网格尺度湍流-辐射相互作用模型在尺度上的应用
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/rad-19.20
G. Fraga, F. C. Miranda, F. França, P. Coelho, J. Janicka
{"title":"ASSESSMENT OF A MODEL FOR SUBGRID-SCALE TURBULENCE-RADIATION INTERACTION APPLIED TO THE SCALED SANDIA FLAME D","authors":"G. Fraga, F. C. Miranda, F. França, P. Coelho, J. Janicka","doi":"10.1615/rad-19.20","DOIUrl":"https://doi.org/10.1615/rad-19.20","url":null,"abstract":"A preliminary assessment of a simple model to account for subgrid-scale turbulence-radiation interaction (SGS-TRI) in a methane-air jet diffusion flame is presented. Results of this model are compared to those obtained by fully neglecting SGS-TRI and to a solution fully considering the phenomenon, this last one obtained via an Eulerian Monte Carlo stochastic field (ESF) method. The studied model did not offer a significant improvement in the predicted radiative emission, though this is mainly due to a heavy underestimation of the subgrid-scale temperature variance, which is determined in the model by assuming local equilibrium between dissipation and production of this quantity. If the SGS temperature variance calculated with the ESF method is used instead, the performance of the SGS-TRI model improves considerably. Even so, contributions of SGS fluctuations of the absorption coefficient, which are currently altogether neglected, should be included for a better prediction of the filtered emission.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116737000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ENTROPY GENERATION AND EXERGY ANALYSIS IN RADIATIVE HEAT TRANSFER SYSTEM WITH NON-GREY MEDIUM AND WALL 非灰介质与壁面辐射传热系统的熵产与火用分析
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.290
Zhongnong Zhang, C. Lou
{"title":"ENTROPY GENERATION AND EXERGY ANALYSIS IN RADIATIVE HEAT TRANSFER SYSTEM WITH NON-GREY MEDIUM AND WALL","authors":"Zhongnong Zhang, C. Lou","doi":"10.1615/RAD-19.290","DOIUrl":"https://doi.org/10.1615/RAD-19.290","url":null,"abstract":"Radiative entropy generation and radiative exergy are important parameters in the analysis of radiative transfer process. Considering the spectral nature of thermal radiation, the radiative entropy generation and radiative exergy in a rectangular enclosure with non-grey participation medium and non-grey wall are analyzed. The Discrete Ordinates method was used to solve the radiative entropy generation equations, and then calculated radiative entropy generation, dimensionless entropy generation and radiative exergy in twelve cases under the uniform and unimodal temperature distributions of medium. The results indicated when the radiative properties in radiative heat transfer system are spectral match, the radiative heat transfer between medium and wall is enhanced, more available work is obtained, and the efficiency of radiative heat transfer is higher. So, in practice, we may select the coating material of wall surface with appropriate spectral emissivity according to the spectral characteristic of radiative properties of medium in practical high-temperature facilities.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116159431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
WHAT IS A NON-BEERIAN EFFECTIVE PHASE OF A MACROPOROUS MEDIUM? 大孔介质的非比尔有效相是什么?
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.130
F. Enguehard, J. Taine
{"title":"WHAT IS A NON-BEERIAN EFFECTIVE PHASE OF A MACROPOROUS MEDIUM?","authors":"F. Enguehard, J. Taine","doi":"10.1615/RAD-19.130","DOIUrl":"https://doi.org/10.1615/RAD-19.130","url":null,"abstract":"Within a real phase associated with a non-Beerian effective phase of a macroporous medium, the distances between interfacial source points and the associated interfacial impact points are not statistically independent of the associated cosines of the incidence angles at the impact points. On the other hand, an effective phase is also non-Beerian when the discrete scale of a radiative REV and the continuous scale of the modelling are not separated. When a phase is statistically anisotropic the study of its Beerian or non-Beerian behavior has to be undertaken from an anisotropic modelling. Interfacial emission is modelled from the reciprocity theorem. The radiative transfer model has to account for the memory effect of all the interfacial sources: In the statistical approach, it is based on a Generalised Radiative Transfer Equation.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116003166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CONCENTRATING SOLAR THERMOPHOTOVOLTAIC ENERGY CONVERSION ENHANCED BY SELECTIVE METAFILM 选择性元膜增强聚光太阳能热光伏能量转换
Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.420
Q. Ni, R. McBurney, H. Alshehri, Liping Wang
{"title":"CONCENTRATING SOLAR THERMOPHOTOVOLTAIC ENERGY CONVERSION ENHANCED BY SELECTIVE METAFILM","authors":"Q. Ni, R. McBurney, H. Alshehri, Liping Wang","doi":"10.1615/RAD-19.420","DOIUrl":"https://doi.org/10.1615/RAD-19.420","url":null,"abstract":"This work performed a detailed theoretical analysis for a concentrating solar thermophotovoltaic (CSTPV) system with a GaSb cell paired with both selective metafilm absorber and emitter. The results showed that the CSTPV system efficiency is between 0.1% and 7.2% when the concentration factor varies from 1 to 100. The analysis on energy loss mechanisms showed that for a metafilm based CSTPV system, half of the incident solar energy is lost through the thermal emission from the top surface of the absorber. In order to enhance the CSTPV system efficiency, the layers thickness of both metafilm absorber and emitter were optimized at 50 suns, increasing the CSTPV system efficiency from 5.8% to 7.8%. The effect of the area ratio of absorber to emitter was also optimized. This work can promote the development of solar thermophotovoltaic system with metafilm absorber and emitter which are easy to be fabricated in large scale.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126380001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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