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S10 Fluidodinâmica de Escoamento Multifásico |
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Title:
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NATURAL CONVECTION IN A SYSTEM COMPOSED OF TWO IMMISCIBLE SUPERPOSED FLUIDS
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Summary :
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ABSTRACT. NATURAL CONVECTION INDUCED BY THERMOCAPILLARY AND BUOYANCY FORCES, IN A RECTANGULAR CAVITY WITH DIFFERENTIALLY HEATED VERTICAL WALLS, CONTAINING TWO IMMISCIBLE SUPERPOSED FLUIDS, WAS NUMERICALLY STUDIED. IN THIS CAVITY, LAMINAR REGIME AND CONSTANT PHYSICAL PROPERTIES WERE CONSIDERED. THERMOCAPILLARY STRESS AT SURFACE OF LAYERS AND DENSITY IN BUOYANCY TERMS WERE ASSUMED AS DEPENDENTS OF TEMPERATURE. THE GOVERNING EQUATIONS WERE WRITTEN USING NON-DIMENSIONAL VARIABLES AND STREAMFUNCTION-VORTICITY FORMULATION. THE PROBLEM WAS RESOLVED USING THE FINITE ELEMENT METHOD. THE RESULTS PRESENT STREAM FUNCTION, TEMPERATURE DISTRIBUTION, AND VELOCITY PROFILE, FOR A SET OF NON-DIMENSIONAL NUMBERS (PRANDTL, RAYLEIGH, AND MARANGONI). SOME NUMERICAL RESULTS WERE COMPARED WITH AN EXPERIMENTAL RESEARCH, REPORTED IN THE LITERATURE, AND FOUND IN GOOD AGREEMENT.
KEY-WORDS: NATURAL CONVECTION, BUOYANCY, THERMOCAPILLARY, FINITE ELEMENT METHOD.
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Author :
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Menon, Genésio José
Panissi, Dênio Lemos
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Paper View :
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