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首页> 外文期刊>Energy Conversion & Management >MODELING OF NATURAL TURBULENT FLOW IN A PASSIVELY HEATED ZONE
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MODELING OF NATURAL TURBULENT FLOW IN A PASSIVELY HEATED ZONE

机译：被动加热区中自然湍流的模拟

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摘要

In the present study, a modified turbulence model has been developed having the goals of representing the dominant buoyancy effect, and also the low turbulence due to buoyancy and the viscous effects in the vicinity of the wall for a zone heated passively with a Trombe wall, where the magnitudes of aspect ratio and Rayleigh number equal to one and 10~(10), respectively. Standard viscosity/diffusivity and Daly Harlow approximations for the definition of the scalar quantities are used and compared to each other. The model and the code solving the governing equations may be applied to similar structures, namely, enclosures with aspect ratio about one, having inlet and outlet openings on the heated side. Also, improving the computational convergence and decreasing the computer time are goals of this work.
机译：在本研究中，已开发出一种改进的湍流模型，其目标是代表主要的浮力效应，以及对于由Trombe壁被动加热的区域，由于浮力引起的低湍流和壁附近的粘性效应，纵横比的大小和瑞利数分别等于1和10〜（10）。使用标准粘度/扩散率和Daly Harlow近似值来定义标量，并将它们相互比较。可以将求解控制方程的模型和代码应用于相似的结构，即，长宽比约为1的外壳，在加热侧具有入口和出口。同样，改善计算的收敛性并减少计算机时间也是这项工作的目标。

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