TY - JOUR
TI - Effect of thermally active zones and direction of magnetic field on hydromagnetic convection in an enclosure
AU - Sivasankaran Sivanandam
AU - Bhuvaneswari Marimuthu
JN - Thermal Science
PY - 2011
VL - 15
IS - 12
SP - 367
EP - 382
PT - Article
AB - The aim of the present numerical study is to investigate the effect of  thermally active zones and direction of the external magnetic field on  hydromagnetic convection in an enclosure. Nine different relative positions  of the thermally active zones are considered. Top and bottom of the enclosure  are adiabatic. The governing equations are solved by the finite volume  method. The results are obtained for different directions of the external  magnetic field, thermally active locations, Hartmann numbers, Grashof numbers  and aspect ratios. It is observed that the heat transfer is enhanced for  heating location is either at middle or at bottom of the hot wall while the  cooling location is either at top or at middle of the cold wall. The flow  field is altered when changing the direction of the magnetic field in the  presence of strong magnetic field. The average Nusselt number decreases with  an increase of the Hartmann number and increases with increase of the Grashof  number and aspect ratio.