A note on magnetoconvection in a vertical enclosure

Abstract

The combined effect of viscous and ohmic dissipations on magnetoconvection in a vertical enclosure heated at the vertical side walls in the presence of applied electric field parallel to gravity and magnetic field normal to gravity is investigated. The coupled non-linear equations governing the motion are solved both analytically valid for small buoyancy parameter N and numerically valid for large N. Solutions for large N reveal a marked change in velocity profile, mass flow rate, skin friction and rate of heat transfer. These results are presented for various Hartmann number M, electric field loading parameter E and buoyancy parameter N. It is shown in the case of open circuit (i.e. E ? 0) that the effect of magnetic field is to increase both the velocity and temperaturein contrast with the short circuit case (i.e. ?= 0). The results for the case when the walls are maintained at the same temperatures (i.e. T1 = T2) are obtained as a particular case. Copyright © 1996 Elsevier Science Ltd.