||February 3, 2010 06:16
convergence problem help!!
we r trying to wall temp for the case of "natural flow through a vertical heated pipe (buoyant flow)".. wall boundary condition is constant heat flux.. Inlet and outlet are set as "opening type"... We r observing Courant number... Courant number < 1 so is being taken care of... residual target is set to be 1e-5.. But aprox around 1e-3 residual curves are going straight... What could be the problem?? lowest dx used in the mesh is "10 mm" and dt=0.003 sec...