Abstract
A numerical study of transient natural convection in a square
cavity with partly thermally active side walls is
introduced. The thermally active regions of the side walls are
periodic in time. Top and bottom of the cavity are adiabatic. Nine
different positions of the thermally active zones are considered.
The governing equations are solved using control volume method
with power-law scheme. The results are obtained for various values
of amplitude, period, and Grashof numbers ranging from