Abstract:
In this study, the e ects of variable viscosity on unsteady natural convection hydromag-
netic
ow of an incompressible electrically conducting
uid, past an isothermal sphere
was investigated. The non-linear partial di erential equations governing the
ow were
solved numerically using the nite di erences method and implemented using MATLAB
software. The velocity pro les, the temperature pro les, the skin friction, heat transfer
and the e ect of varying the various
ow parameters are discussed. These
ow param-
eters include the Grashof number,Reynolds number, the magnetic parameter and the
viscous variation parameter. A change on the parameters is observed to either increase,
decrease or to have no e ect on the
ow.
