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-   -   convergence problem help!! (http://www.cfd-online.com/Forums/cfx/72356-convergence-problem-help.html)

vijeshjoshi23 February 3, 2010 06:16

convergence problem help!!
 
Hello friends,
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...

ghorrocks February 3, 2010 23:34

http://www.cfd-online.com/Wiki/Ansys...gence_criteria


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