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gradually openning the side wall of a tube to a environment with constant stagnations

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Old   November 17, 2012, 16:38
Smile gradually openning the side wall of a tube to a environment with constant stagnations
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Ehsan
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hello all my friends all over the world
I want to simulate a long channel you may assume closed end at right side but at the left side the wall move from rest at a constant velocity downward so that it opens to a constant stagnation pressure and stagnation temperature-that we know the values of them-environment that are greater than inside the channel.how can I model this gradually openning wall? should I mix groovyBC and mixed boundary conditions?how?or this can be done easier?
Thank you much for your helping.
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Old   November 18, 2012, 13:17
Default any suggest?
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could anyone guide me about this problem?what should I do?the problem is 2-D and as I told moving wall BC is replaced with p0 and T0 BC at inlet gradually according to wall velocity.silmply saying its a gradually opennin of a wall to an environment.I appreciate any suggestion and guidance.can this be done by groovyBC?
is it necessary to assign different BC for each cell in boundary?
thank you.
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Old   November 20, 2012, 03:02
Default solving the problem
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hello friends
I could simulate gradually opening the door with constant velocity at environment.now for replacing BC by stagnation properties I need the center values of cells neighbouring the boundary.how I can get and use of them?what are the needed functions?
Thank you
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Old   June 16, 2013, 12:09
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Hi again
I managed to do it.if someone wanted my guidance I'm ready to help him/her.
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