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Why the velocity keeps rising??

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Old   July 1, 2008, 13:49
Default Why the velocity keeps rising??
  #1
arkuk
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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
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Old   July 2, 2008, 18:08
Default Re: Why the velocity keeps rising??
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Glenn Horrocks
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Hi,

Almost always this is due to the physics of the simulation you have defined, for instance a heat source with no heat sink so the temperature steadily rises.

It can also be caused by inadequate convergence.

Glenn Horrocks
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Old   July 3, 2008, 09:44
Default Re: Why the velocity keeps rising??
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arkuk
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Hi Glenn

I am observing significant increase in my velocity. As a result my LES results look very different than my RANS solution. At the start of my siumlation I had a velocity of 2 m/s but now its almost 3.5 m/s. There has to be something here.

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