Direct numerical simulation of double diffusive natural convection in a closed mixture cavity heated from below

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci221107069x

Yaowen Xia, Juan Chen

引用次数: 0

Abstract

Double diffusive natural convection is one of the most widely used study subjects in heat and mass transfer. In this present study, double diffusive natural convection heating from below the wall in a closed cavity was studied with DNS method. The flow characteristics are presented as isotherms, iso concentrations, and streamlines. The results show that RaT has signification strong effects on average Nusselt number, with a more considerable RaT, the value of Nusselt number more higher. These were also found to increase with increasing buoyancy ratio for adding flow and decrease as buoyancy ratio decreases for opposing flows.

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从下加热的密闭混合腔内双扩散自然对流的直接数值模拟

双扩散自然对流是传热传质中应用最广泛的研究课题之一。本文采用DNS方法对密闭腔内壁下双扩散自然对流加热进行了研究。流动特征表现为等温线、等浓度和流线。结果表明，RaT对平均努塞尔数有显著的强影响，RaT越可观，努塞尔数的值越高。在加流条件下随浮力比增大而增大，在反流条件下随浮力比减小而减小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.