Open Access

ARTICLE

STUDY ON HEAT AND MASS TRANSFER AND NONLINEAR CHARACTERISTICS WITH THERMAL AND SOLUTAL SOURCE IN A CAVITY

Yubing Li^a , Mo Yang^a,*, Jian Li^b , Zhiyun Wang^a

a School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
b Shanghai Aircraft Manufacturing Co., Ltd., Commercial Aircraft Corporation of China, Ltd., Shanghai 200436, China

* Corresponding Author: Email:

Frontiers in Heat and Mass Transfer 2019, 13, 1-8. https://doi.org/10.5098/hmt.13.11

Abstract

Thermalsolutal convection induced by mass and heat source in horizontal cavity is investigated numerically based on SIMPLE algorithm with QUICK scheme. The high-concentration heat source is placed in the square cavity, and the cavity wall is low temperature and low concentration. The smoke is used as the diffusion medium, and the flow field, temperature and concentration of the fluid under different Rayleigh number, buoyancy ratio Nc, Soret numbers and Dufour numbers are analyzed systematically. Parameter study demonstrates that heat and mass transfer of thermosolutal convection are enhanced with increasing Rayleigh number or buoyancy ratio, and the couple-diffusive interaction has a significant linear effect on heat transfer and mass diffusion. The results also show that double-diffusive convection evolves from steady state, periodic oscillatory, double-period oscillation to chaos. Critical Rayleigh number of period oscillations and chaos declined with increasing buoyance ratio.

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Keywords

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