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Paper Information

Journal:   FLUID MECHANICS AND AERODYNAMICS JOURNAL   SPRING-SUMMER 2015 , Volume 4 , Number 1 (15); Page(s) 77 To 88.
 
Paper: 

EFFECT OF MAGNETIC FIELD ON UNSTEADY NATURAL CONVECTION HEAT TRANSFER OF CU– WATER NANO FLUID IN A SQUARE POROUS CAVITY

 
 
Author(s):  TAHMASEBI KOHYANI M., GHASEMI B., RAISI A.
 
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Abstract: 

Magnetic field effect on unsteady natural convection heat transfer of Cu–Water nanofluid in a square porous cavity was studied numerically in here. At first, initial temprature of the cavity was Ti and vertical walls were at temperature Tc = Ti Suddenly the right wall’s tamprature was changed to Th and the horizontal walls were adiabatic. The effective parameters in this study were Ra, Ha, and j. which appear in the non-dimensionalized equations. Ra is a function of temperature difference between hot and cold walls, Ha is a parameter that depends on the magnetic field, and j is the volume fraction of nano particles. The non-dimensionalized governing equations were obtained based on darcy model. A control volume approach was used for solving these equations. The effect of the variation of parameters, Ra , Ha and j, on heat transfer rate, fluid flow, isotherms, and the steady time of solution were investigated. The solutions show that steady time decreases, as Ra increases or j decrease. While, variation of Ha for high Ra has different effects on steady time.

 
Keyword(s): NANO FLUID, POROUS MEDIUM, NATURAL CONVECTION, UN STEADY, MAGNETIC FIELD
 
References: 
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