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Old   April 27, 2010, 02:03
Default uniform flow
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I am trying to implement B.C. for parallel flow at an angle. The domian is basically a box and I have assumed zero normal gradient across the free boundaries for all variables. Funnily i set the initial flow angle to say 45% and as time progresses the flow adjusts itself so that it is parallel to the top and bottom boundaries. How can I avoid this from happening?

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