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Help with In-Form and Boundary Conditions

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Old   October 18, 2008, 10:49
Default Help with In-Form and Boundary Conditions
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Hi! I'm having a problem for which I need some help from In-form or GROUND users. I'm making an implementation of a periodic boundary condition for polar co-ordinates via In-Form, and all I have to do is link the two extremes of the domain in order do achieve periodicity. But one problem arises when I have to set a boundary condition for inlet and outlet of the domain, which are sources which depend respectively of the w1[&&(nz-1)] and w1[&&1] velocities: since In-Form reads w1[&&(nz-1)] and w1[&&1] (or any other variable) from the previous iteration, aplying this velocities in the inlet and outlet sources makes my procedure an explicit boundary condition implementation, which I'm almost sure that is slowing convergence too much; all I want is that In-Form understands that this formula should be IMPLICIT on w1[&&(nz-1)] and w1[&&1], understanding that these velocities should NOT be reached from the previous iteration, but instead introduced into the differencial equations and discretized for the w1[&&(nz-1)] and w1[&&1] equations. Can anyone please help me? Thanks!!
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