Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19最新文献_第4页

A NUMERICAL STUDY OF RADIATION IN A SMALL-SCALE POOL FIRE 小规模池火辐射数值研究

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.40

Bifen Wu, Xinyu Zhao, Somesh P. Roy

引用次数: 4

INTERNAL RADIATION EFFECTS ON THE THERMAL RESPONSE OF HIGHLY POROUS MATERIALS IN RADIATIVE ENVIRONMENT 辐射环境中内辐射对高多孔材料热响应的影响

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/rad-19.140

Jeremy Mora-Monteros, C. Suter, S. Haussener

引用次数: 0

NUMERICAL ANALYSIS OF HYPERSONIC FLOW COUPLED WITH RADIATION AROUND BLUNT-NOSED MODELS 高超声速流与辐射耦合钝鼻模型的数值分析

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.340

Sanket Razdan, A. Bhagat, N. Dongari

{"title":"NUMERICAL ANALYSIS OF HYPERSONIC FLOW COUPLED WITH RADIATION AROUND BLUNT-NOSED MODELS","authors":"Sanket Razdan, A. Bhagat, N. Dongari","doi":"10.1615/RAD-19.340","DOIUrl":"https://doi.org/10.1615/RAD-19.340","url":null,"abstract":"In the present work, numerical simulations are carried out in a non-continuum hypersonic regime to analyze the flow properties in the shock layer of a blunt body. Radiative transfer equation is added to the existing Navier-Stokes based solver. The solver is developed within OpenFOAM framework and accommodates features to model thermodynamic properties of high-temperature gases and non-equilibrium boundary conditions. The radiative transport equation is solved using spherical harmonics (P1) and finite volume discrete ordinate method (fvDOM) approximations. The aerothermodynamics of high-temperature non-equilibrium flowfield over blunt-nosed models have been analyzed using our solver and results are validated with DSMC data. Good agreement has been observed with DSMC data and significant improvement is seen when compared to the conventional high-speed compressible flow solver. The results have shown that a considerable amount of heat escapes from the shock-layer region, hence resulting in radiative cooling. It is observed that, if no radiative heat transfer is considered in the solver, it overpredicts the temperature and shock-layer thickness. Therefore incorporation of radiation along with all the non-equilibrium effects in the rarefied hypersonic regime is imperative.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"1 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":"129219904","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

Development of a Weighted-Sum-of-Gray-Gases Model for Modeling Radiative Heat Transfer in Coal-Fired Oxy-Fuel Boilers 燃煤全氧锅炉辐射传热加权灰色气体和模型的建立

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.530

Vitali Kez, J. Consalvi, Fengshan Liu, M. Koch, O. Hatzfeld, R. Kneer

引用次数: 1

LIMITS OF THE LIGHT SCATTERING BY SMALL METALLIC PARTICLES USING EVOLUTIONARY TOPOLOGY OPTIMIZATION 基于进化拓扑优化的小金属粒子光散射极限

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.200

Mine Kaya, S. Hajimirza

引用次数: 0

A CRITERION FOR EVALUATION OF THE VALIDITY OF BLACK CARBON REFRACTIVE INDEX FROM MEASUREMENTS OF LIGHT ABSORPTION IN THE VISIBLE AND NEAR-INFRARED 从可见光和近红外光吸收测量中评价黑碳折射率有效性的准则

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.60

Fengshan Liu, J. Yon, A. Fuentes, Joel C Corbin, P. Lobo, G. Smallwood

{"title":"A CRITERION FOR EVALUATION OF THE VALIDITY OF BLACK CARBON REFRACTIVE INDEX FROM MEASUREMENTS OF LIGHT ABSORPTION IN THE VISIBLE AND NEAR-INFRARED","authors":"Fengshan Liu, J. Yon, A. Fuentes, Joel C Corbin, P. Lobo, G. Smallwood","doi":"10.1615/RAD-19.60","DOIUrl":"https://doi.org/10.1615/RAD-19.60","url":null,"abstract":"The fractal-like black carbon particles emitted from combustion systems and biomass burning are short-lived pollutants that contribute significantly to climate forcing. To accurately quantify the forcing and interpret optical measurements of uncoated and coated black carbon (BC) particles, it is indispensable to know the refractive index m = n + ki of BC in the visible and near infrared. In this study the effects of various morphological parameters and structure defects of black carbon particles on their mass absorption cross section (MAC) were first investigated using the generalized Mie-solution method (GMM) and discrete dipole approximation (DDA). The accuracy of the Rayleigh-Debye-Gans (RDG) approximation is also evaluated. Based on recent measurements of the soot absorption function E(m) and freshly emitted BC MAC in the visible and near-infrared, the most probable range of E(m) was recommended. A criterion was proposed to determine the valid range of refractive index of freshly emitted BC based on the contour plot of E(m) on the n-k plane.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"21 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":"127724070","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

ACCURACY OF ENGINEERING METHODS FOR RADIATIVE TRANSFER IN CO2-H2O MIXTURES AT HIGH TEMPERATURE 高温下co2-h2o混合物辐射传递工程方法的准确性

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.500

F. André, F. R. Coelho, J. Consalvi, F. França, M. Galtier, F. Nmira, V. Solovjov, B. W. Webb

引用次数: 10

COMBINED HEAT TRANSFER IN A SNOWPACK HEATED BY SOLAR RADIATION 被太阳辐射加热的积雪中的复合传热

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/rad-19.160

L. Dombrovsky, A. Kokhanovsky, J. Randrianalisoa

引用次数: 0

SEGREGATED APPROACH FOR THE MODELING OF CONTINUOUS HEAT TREATMENT FURNACES 连续热处理炉建模的分离方法

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.90

Faizan Siddiqui, Kaan Meneksedag, A. Basol, M. Pinar Mengüç

{"title":"SEGREGATED APPROACH FOR THE MODELING OF CONTINUOUS HEAT TREATMENT FURNACES","authors":"Faizan Siddiqui, Kaan Meneksedag, A. Basol, M. Pinar Mengüç","doi":"10.1615/RAD-19.90","DOIUrl":"https://doi.org/10.1615/RAD-19.90","url":null,"abstract":"Accurate modeling of the transient material temperature distribution inside the continuous heat treatment furnaces are very critical in terms of adjusting the process parameters of the furnace operations. In this study the transient heating process inside the heating section of continuous glass annealing furnace is simulated using a segregated approach. Convective heat transfer inside the furnace is modeled using a steady-state solver in the Eulerian frame of reference and the transient conduction problem inside the moving glasses is using a separate transient solver in Lagrangian frame of reference. Radiation heat transfer between the glasses and the furnace is modeled using a graphics processor accelerated Monte Carlo ray tracing based surface-to-surface radiation model. The glass and furnace surfaces are taken as black in the considered scenario. The segregated approach is evaluated to be suitable as a modeling approach in terms of the convergence rate. Due to the fast convergence rate of the method and acceleration of the MCRT solver, the present heating process can be simulated in around 2 hours of computational time. Finally, the observed non-uniformity in the glass temperature distributions at the furnace outlet are quantified and the possible causes of this non-uniformity are discussed.","PeriodicalId":413005,"journal":{"name":"Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19","volume":"50 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":"129063657","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

LOCALIZED NEAR-FIELD RADIATIVE HEAT TRANSFER IN BIOMIMICRY DESIGNS INSPIRED BY NEON TETRA FISH 受霓虹鱼启发的仿生设计中的局部近场辐射传热

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI: 10.1615/RAD-19.480

Azadeh Didari, M. Pinar Mengüç

引用次数: 0