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-   -   unsteady state calculation with adaptive time step (http://www.cfd-online.com/Forums/fluent/46544-unsteady-state-calculation-adaptive-time-step.html)

sm November 7, 2007 02:26

unsteady state calculation with adaptive time step
 
I have been using coupled solver for unsteady state calculation with adaptive time step. I find that the time step becomes very small (1x10e-08 seconds) and so it takes unusually long time to compute. Is there way to achieve convergence with a larger step size. Is linearization of the source term possible. Also can we fix the lower limit of the scalar variables i.e say it should always be positive. sm


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