正方形密閉容器に満たされた二成分ガス系の二重拡散対流に及ぼすルイス数の影響

概要

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This paper presents double-diffusive convection in a square cavity filled with binary gas, due to horizontal opposing temperature and concentration gradients. The effect of Lewis number was considered under the conditions of Prandtl number Pγ=1,buoyancy ratio N=1 and thermal Rayleigh number Ra_r=10^4 and 10^5. Numerical solutions are obtained by a Chebyshev collocation technique with high resolution. Depending upon the Lewis number, three kinds of flow structures are identified, i.e., symmetric steady flow, asymmetric oscillatory flow and symmetric oscillatory flow. Oscillatory flow occurs in the regime of thermal dominant flow and it leads to a periodic change between stable and unstable states in species stratification due to the thermo-solutal interaction.
一般社団法人日本機械学会の論文
1998-10-25