MAGNETIC FIELD EFFECTS ON MIXED CONVECTION 
BETWEEN ROTATING COAXIAL DISKS
M. F. Dimian and A. H. Essawy

UDC 532.135

This paper deals with a similarity analysis of axisymmetric 
mixed convection between two horizontal infinite rotating coaxial 
disks in the presence of a magnetic field. The governing Navier
-Stokes equations and energy equation reduce to a set of nonlinear 
ordinary differential equations using similarity. The resulting set 
of ordinary differential equations has been solved numerically using 
a shooting method and is represented graphically. For Reynolds number, 
Re, up to 500 and buoyancy parameter, B =  T, of the 
range |B| 0.05, the flow and heat transfer characteristics 
with Prandtl numbers 7, 0.7, 0.1 and 0.01 and magnetic field parameters 
of m = 0.5, 1, and 2 are examined. The heat transfer increases with 
the Prandtl number but decreases with the magnetic parameter. It is 
established that the rotation of the two disks has a very small effect 
on the temperature of the fluid and the heat-transfer process.

JEPTER74920200015
JEPTER7492015