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SR13 Mecânica dos Fluidos |
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Title:
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RESULTADOS TEÓRICOS PARA TURBULÊNCIA GERADA POR DUAS GRELHAS OSCILANTES
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Summary :
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ISOTROPIC TURBULENCE MAY BE GENERATED BETWEEN TWO OSCILLATING GRIDS AND IS GOVERNED BY DIFFUSION AND DISSIPATION PROCESSES FOR GREATER DISTANCES FROM THE GRIDS. THIS FACT IS USED TOGETHER WITH THE K-EPSILON MODEL TO DESCRIBE THE BEHAVIOUR OF THE KINETIC ENERGY AND ITS DISSIPATION RATE BETWEEN THE GRIDS. STATIONARY TURBULENCE IS CONSIDERED. A THEORETICAL SOLUTION (IN THE FORM OF AN ELIPTIC INTEGRAL) IS OBTAINED FOR CONSTANT TURBULENT VISCOSITY. OTHERHAND, FOR GENERAL TURBULENT VISCOSITY, A SOLUTION IN THE FORM OF POWER SERIES FOR K AND EPSILON IS FURNISHED. IT IS SHOWN THAT THIS GENERAL SOLUTION ALSO PRODUCES A CONSTANT TURBULENT VISCOSITY NEAR THE ORIGIN, WHICH VALIDATES THE CLOSED SOLUTION IN THE FORM OF AN ELIPTIC INTEGRAL. |
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Author :
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Chaudhry, Fazal Hussain
Schulz, Harry Edmar
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Paper View :
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