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-   -   Time step (http://www.cfd-online.com/Forums/star-ccm/114672-time-step.html)

hyderkhan74 March 15, 2013 06:45

Time step
 
Hi
I do simulation for flow around building and it includes unsteady conditions that I use implicit unsteady . My question is what the limit for the time step, and can we take it as big as 1 hour ?
Thanks in advance :D

abdul099 March 21, 2013 18:09

Short answer: No, you can't make it as big as 1 hour when you want go get a reasonable result.
I can't tell you about the limit since it depends of the mesh and the physics. Try to keep the CFL number below 1 for physical results.


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