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Three-dimensional numerical simulation of conduction, natural convection, and radiation through alveolar building walls

机译：肺泡建筑墙体传导，自然对流和辐射的三维数值模拟

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Numerical simulation of the coupled heat transfers by conduction, convection, and Received 7 February 2019 radiation through two kinds of the alveolar structures used in the construction are Received in revised form 10 May 2019 numerically investigated. Owing to the low-temperature differences involved, the Accepted 14 May 2019 tridimensional model is based on the Boussinesq approximation and constant thermophysical fluid properties at mean temperature. The alveolar walls are assumed grey and diffuse. The symmetric and periodic boundary conditions for flows governed by the incompressible Navier-Stokes equations are considered. Equations governing the Surface radiation natural convection in the alveolars, the radiative heat exchanges between their internal Combined heat transfer surfaces and the heat conduction in the surrounding walls are solved using a finite volume Thermal resistance method. The pressure-velocity coupling is solved by SIMPLE algorithm. The objective of this study is to improve the effects of wall conduction and radiation heat exchange between surfaces on the decrease of the thermal resistance in the alveolar walls. Two kinds of concrete blocks with three and six-hole numbers are chosen and their thermal resistances are numerically predicted. The comparison between the thermal resistances, specified in terms of thermal regulations for buildings and numerical solutions, is presented. ? 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
机译：通过传导，对流和2019年2月7日通过建筑中使用的两种肺泡结构接收的辐射的耦合传热的数值模拟，以修改后的形式于2019年5月10日进行了数值研究。由于涉及的低温差异，2019年5月14日的三维模型基于Boussinesq逼近和平均温度下恒定的热物理流体特性。肺泡壁假定为灰色且弥漫性。考虑了由不可压缩的Navier-Stokes方程控制的流动的对称边界条件和周期性边界条件。使用有限体积热阻法求解控制肺泡中表面辐射自然对流，其内部组合传热表面之间的辐射热交换以及周围壁中的热传导的方程式。通过SIMPLE算法解决了压力-速度耦合问题。这项研究的目的是改善表面之间的壁传导和辐射热交换对减少肺泡壁热阻的影响。选择两种具有三孔和六孔编号的混凝土砌块，并对它们的热阻进行数值预测。给出了根据建筑物的热调节和数值解决方案指定的热阻之间的比较。 ？ 2019作者。由Elsevier Ltd.发行。这是CC BY许可下的开放访问文章（http://creativecommons.org/licenses/by/4.0/）。

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