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首页> 外文期刊>Numerical Heat Transfer, Part A: Applications >Lattice Boltzmann Method and Modified Discrete Ordinate Method Applied to Radiative Transport in a Spherical Medium with and without Conduction
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Lattice Boltzmann Method and Modified Discrete Ordinate Method Applied to Radiative Transport in a Spherical Medium with and without Conduction

机译：格子Boltzmann方法和修正的离散标准方法分别应用于有和没有导体的球形介质中的辐射输运

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This article deals with the application of the modified discrete ordinate method (MDOM) to calculate volumetric radiative information with and without conduction in a concentric spherical enclosure containing a participating medium. With radiative information known from the MDOM, the energy equation of the combined mode transient conduction and radiation heat transfer is formulated and solved using the lattice Boltzmann method (LBM). Without conduction, for pure radiation case, two benchmark problems, representing nonradiative and radiative equilibrium situations are taken up. In the case of non-radiative equilibrium, an isothermal medium is bounded by cold walls and medium is the source of radiation, while in the case of radiative equilibrium, nonisothermal medium is confined between a hot and a cold wall, and the hot (inner sphere) wall is the radiation source. Depending upon the problem, heat flux, energy flow rate, emissive power, and temperature distributions in the medium are calculated for different values of parameters such as the extinction coefficient, the scattering albedo, the conduction-radiation parameter, the boundary emissivity, and the radius ratio. To validate the MDOM and the LBM-MDOM formulations, problems are also solved using the finite volume method (FVM) and the finite-difference method (FDM)-FVM approach, in which the FVM is used to calculate the volumetric radiation and the energy equation is also solved using the FDM. Results of the MDOM, LBM-MDOM, FVM and FDM-FVM are also benchmarked against those available in the literature. MDOM and LBM-MDOM have been found to provide accurate results.View full textDownload full textRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10407782.2010.529028
机译：本文讨论了在包含参与介质的同心球形外壳中，在有传导和无传导的情况下，改进的离散纵坐标方法（MDOM）在计算体积辐射信息时的应用。利用MDOM中已知的辐射信息，可以使用晶格玻尔兹曼方法（LBM）来制定和求解组合模式瞬态传导和辐射热传递的能量方程。在没有传导的情况下，对于纯辐射情况，要解决两个基准问题，分别代表非辐射和辐射平衡情况。在非辐射平衡的情况下，等温介质以冷壁为边界，并且介质是辐射的源，而在辐射平衡的情况下，非等温介质被限制在热壁和冷壁之间，热壁（内部球）是辐射源。根据问题，针对不同的参数值（例如消光系数，散射反照率，传导辐射参数，边界发射率和反射率）计算介质中的热通量，能量流率，发射功率和温度分布。半径比。为了验证MDOM和LBM-MDOM公式，还使用有限体积法（FVM）和有限差分法（FDM）-FVM方法解决了问题，其中使用FVM计算体积辐射和能量方程也可以使用FDM求解。 MDOM，LBM-MDOM，FVM和FDM-FVM的结果也相对于文献中的结果进行了基准测试。已发现MDOM和LBM-MDOM可提供准确的结果。 digg，google，more“，发布号：” ra-4dff56cd6bb1830b“};添加到候选列表链接永久链接http://dx.doi.org/10.1080/10407782.2010.529028

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