湍流热扩散率的直接数值模拟

IF 0.7 4区工程技术 Q4 ENGINEERING, CHEMICAL

Theoretical Foundations of Chemical Engineering Pub Date : 2025-03-17 DOI:10.1134/S0040579525600226

Yu. G. Chesnokov

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引用次数: 0

摘要

研究了平面通道中雷诺数和普朗特数对湍流热扩散系数的影响。采用了各研究组直接数值模拟得到的数据。由动态速度计算得到的湍流热扩散系数与分子热扩散系数之比以及与雷诺数之比并不是无量纲到壁面距离的普遍函数，由温度分布的对数公式和温度缺陷定律可知，而是取决于雷诺数和普朗特数。获得的关系允许人们在这些参数的相对较大的值下估计这个值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Direct Numerical Simulation of Turbulent Thermal Diffusivity

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Direct Numerical Simulation of Turbulent Thermal Diffusivity

The influence of the Reynolds and Prandtl numbers on the turbulent thermal diffusivity in a flat channel was studied. The data obtained by various research groups by direct numerical simulation were used. It was shown that the ratio of the turbulent thermal diffusivity to the molecular thermal diffusivity and to the Reynolds number calculated from the dynamic velocity is not a universal function of the dimensionless distance to the wall, as follows from the logarithmic formula for the temperature profile and the temperature defect law, but depends on the Reynolds and Prandtl numbers. Relationships were obtained that allow one to estimate this value at relatively large values of these parameters.

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来源期刊

Theoretical Foundations of Chemical Engineering 工程技术-工程：化工

CiteScore

1.20

自引率

25.00%

发文量

审稿时长

24 months

期刊介绍： Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.