natural convection - grid adapt

co2

hi folks,

When I try to solve my natural convection problem (2d. axisymmetric) on a single processor, serial mode 2GB machine, it is taking too much time. My time step size is 0.2 sec, My experiments are 30 day long .. so it is just imposssible to wait to get all the results from a single processor.... So I was thinking running fluent in parallel. We do have several available processors here and those certainly can be used. I have been reading about parallel processing related questions on this forum for the last few hours. I noticed that if I try to solve a small problem in fluent parallel, then actually I can end up spending more time in parallel as fluent spends too much time in communication. We do have a 100 MB/sec connection speed University LAN which is very good. My problem has only 30,000 cells. Should I really attempt to solve this problem in parallel .. I just can not imagine running this model for over 30 to 40 days of actual time and then comparing results .. please suggest some solution. Time step size can not be increased as i am dealing with buoyancy driven flow and I want to preserve accuracy ..