考虑过程历史的湍流直接数值模拟法

Q3 Mathematics

Mathematical Models and Computer Simulations Pub Date : 2023-12-26 DOI:10.1134/s2070048223070165

Yu. V. Yanilkin, A. R. Guzhova, L. I. Degtyarenko, V. Yu. Kolobyanin, V. A. Shmelev

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引用次数: 0

摘要

摘要针对不同密度的可混合物和不可混合物的湍流混合，提出了一种直接数值建模（DNM）的新方法。该方法的思路是在包含混合物质的混合单元中，将均相混合物状态与由带界面的碎片组成的异相混合物状态分开。本文介绍了为实现上述方法而在带浓度的欧拉气体动力学（EGAK）代码中开发的二维技术。该方法使用了一个经典的湍流混合问题进行验证，该问题是由于两种不同密度气体之间的界面恒定加速度处的瑞利-泰勒不稳定性引起的。

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 Method of Turbulence Taking the History of the Process into Account

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Direct Numerical Simulation Method of Turbulence Taking the History of the Process into Account

Abstract

A new approach to the direct numerical modeling (DNM) of the turbulent mixing of miscible and immiscible materials of different densities is proposed. The idea of the approach is to separate the states of homogeneous mixtures from heterogeneous ones, consisting of fragments with interfaces, in mixed cells containing mixing substances. This article describes a 2D technique developed in the Euler gas dynamics with concentrations (EGAK) code to realize the approach described above. The method is verified using a classical problem of turbulent mixing arising due to the Rayleigh–Taylor instability at the constant acceleration of the interface between two gases of different densities.

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来源期刊

Mathematical Models and Computer Simulations Mathematics-Computational Mathematics

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： Mathematical Models and Computer Simulations is a journal that publishes high-quality and original articles at the forefront of development of mathematical models, numerical methods, computer-assisted studies in science and engineering with the potential for impact across the sciences, and construction of massively parallel codes for supercomputers. The problem-oriented papers are devoted to various problems including industrial mathematics, numerical simulation in multiscale and multiphysics, materials science, chemistry, economics, social, and life sciences.