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star cd convergence error

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Old   September 14, 2011, 03:53
Default star cd convergence error
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hi im a chemical engineering post graduate student and i have to model and simulate a tray dryer using STAR CD and im somewhat new to CFD. i started my model as a .IGES file and created the surface mesh in pro-surf as a .dbs file n then as a .mdl file in pro amm. when i run the model there are convergence errors and when i check the residuals and browse the standard output file, after 2 iterations there is an error message saying,
"FLUID FLOW DETECTED AT SOME OUTFLOW BOUNDARIES MASS FLUX IS FORCED TO ZERO. IF THIS CONDITION PERSISTS, YOUR CALCULATIONS MAY BE WRONG "

the mesh didn't get converged after 100000 iterations. my mesh got around 1 500 000 fluid (air) trimmed cells, with 5ms-1 air speed at the inlet and flow is steady state and laminar. used SIMPLE method to solve it. and in the star guide panel, i make all the input parameters like i did in the STAR tutorial 2nd example, (flow in a partially blocked elbow).

im new to CFD and STAR CD and spend considerable time to figure out whats wrong with my model .. can you please give me some advice?
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