Analysis of the Magnetic Field Effect on Entropy Generation at Thermosolutal Convection in a Square Cavity

Entropy

Mounir Bouabid¹  Nejib Hidouri¹  Mourad Magherbi² 

[1] Chemical and Processes Engineering Department, Engineers National School of Gabès, Gabes University, Omar Ibn El Khattab Street, 6029 Gabès, Tunisia; E-Mails:;Civil Engineering Department, High Institute of Applied Sciences and Technology, Gabes University, Omar Ibn El Khattab Street, 6029 Gabès, Tunisia; E-Mail:

关键词: double diffusive convection;    square cavity;    entropy generation;    magnetic effect;   

DOI  :  10.3390/e13051034

来源: mdpi

【 摘 要 】

Thermosolutal convection in a square cavity filled with air and submitted to an inclined magnetic field is investigated numerically. The cavity is heated and cooled along the active walls with a mass gradient whereas the two other walls of the cavity are adiabatic and insulated. Entropy generation due to heat and mass transfer, fluid friction and magnetic effect has been determined in transient state for laminar flow by solving numerically the continuity, momentum energy and mass balance equations, using a Control Volume Finite—Element Method. The structure of the studied flows depends on four dimensionless parameters which are the Grashof number, the buoyancy ratio, the Hartman number and the inclination angle. The results show that the magnetic field parameter has a retarding effect on the flow in the cavity and this lead to a decrease of entropy generation, Temperature and concentration decrease with increasing value of the magnetic field parameter.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.