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首页> 外文期刊>International Journal of Heat and Fluid Flow >Stochastic modelling of conjugate heat transfer in near-wall turbulence
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Stochastic modelling of conjugate heat transfer in near-wall turbulence

机译：近壁湍流中共轭传热的随机模型

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摘要

The paper addresses the conjugate heat transfer in turbulent flows with temperature assumed to be a passive scalar. The Lagrangian approach is applied and the heat transfer is modelled with the use of stochastic particles. The intensity of thermal fluctuations in near-wall turbulence is determined from the scalar probability density function (PDF) with externally provided dynamical statistics. A stochastic model for the temperature field in the wall material is proposed and boundary conditions for stochastic particles at the solid-fluid interface are formulated. The heated channel flow with finite-thickness walls is considered as a validation case. Computation results for the mean temperature profiles and the variance of thermal fluctuations are presented and compared with available DNS data.
机译：本文讨论了假设为被动标量的湍流中的共轭传热。应用拉格朗日方法，并使用随机粒子对热传递进行建模。近壁湍流中热波动的强度由标量概率密度函数（PDF）与外部提供的动态统计信息确定。提出了壁材料中温度场的随机模型，并建立了固液界面处随机颗粒的边界条件。具有有限厚度壁的加热通道流被视为验证案例。给出了平均温度曲线和热波动方差的计算结果，并将其与可用的DNS数据进行了比较。

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