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how to change inlet condition in unsteady flow?

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Old   July 8, 2002, 09:36
Default how to change inlet condition in unsteady flow?
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bob
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i want to simulate a full process of unsteady flow in a pipe with one inlet before 0.2s, when t=0.2s another wall turn to be a velocity inlet and there are two velocity after 0.2s. how to define these, i guess i should use the function of "macro", but how to set the macro?

is there anyone who will give me a advice in detail ?

regards
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Old   July 8, 2002, 15:25
Default Re: how to change inlet condition in unsteady flow
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Lanre
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The is a tutorial (UDF Users' Guide) specifically detailing how you would go about specifying a transient velocity condition on a velocity-inlet boundary. Take a look see...
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Old   July 10, 2002, 00:22
Default Re: how to change inlet condition in unsteady flow
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Jin-Wook LEE
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I think that UDF is the only possible way.

Sincerely, Jinwook

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Old   July 12, 2002, 18:52
Default Re: how to change inlet condition in unsteady flow
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Duc
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Hi,

I wasn't quite sure what you are trying to simulate, but I also think the use of UDF with unsteady flow settings may help. A good example can be found under Tutorial 4.
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