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-   -   why velocity keeps rising?? (http://www.cfd-online.com/Forums/main/15371-why-velocity-keeps-rising.html)

arkuk July 1, 2008 13:50

why velocity keeps rising??
 
Hi

I am running LES simulation with periodic boundaries. I am monitoring velocity at a point in my domain. I observe steady increase in my velocity. Why is that?? Any input will be welcome.

Thank you

agg July 3, 2008 18:57

Re: why velocity keeps rising??
 
If your scheme is not energy conserving, instabilities could cause one component say u-velocity to rise and then to satisfy divergence the other two components also increase. And the downhill begins.

You can look up papers on "energy conserving schemes" for more information.


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