boundary condition in bouyancy induced flow
 

hi

i have problem in assigning the boundary condition.

description of domain and problem: a plate of wave surface is placed in abient and is supplied with constant heat flux. i am solving for the temperature history of the fluid over the plate. as the driving force is only bouyancy and no force exist i have to consider the region effected by convection which changes with time. is there any alternative of representing boundary conditions. if i have to go for moving boundary how should i proceed. prashant