A Mathematical Theorem on the Onset of Stationary Convection in Couple-Stress Fluid
Publish place: Journal of Applied Fluid Mechanics، Vol: 6، Issue: 2
Publish Year: 1392
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-6-2_005
تاریخ نمایه سازی: 5 بهمن 1400
Abstract:
The thermal instability of a couple-stress fluid heated from below is investigated. Following the linearized stability theory and normal mode analysis, the paper mathematically establishes that the onset of instability at marginal state, cannot manifest itself as stationary convection, if the thermal Rayleigh number R and the couple-stress parameter F, ۳ satisfy the inequality ۲ ۲ ۲ ۲ ۱ ۳ F ۳ F ۱ ۳ F ۱ , and when the couple-stress parameter F is R ۲ ۲ ۲۷ F ۱ ۱ ۳ F infinitesimally small, R ۲۷ ۴ ۴ ۲ F , the result which also clearly mathematically established the stabilizing ۱ ۲ character of the couple-stress.
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Authors
A. S. Banyal
Department of Mathematics, NSCBM, Govt. College Hamirpur, (HP,) ۱۷۷۰۰۵, India