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From: Shengli Xu <shengli.xu.xu@gm...>  20070911 03:10:32

Hi, I use the mixed galerkin finite element to sovle darcy equation. pressure is linear interpretation, velocity is quadratic interpretation。 The domain is square. The result is correct when I apply noslip b.c on top and bottom side, zero pressure on rightbottom corner, Ux=1.0 on left side. But I can not get correct result if I apply noslip b.c on top and bottom side, zero pressure on the right side, P=1 on the left side. Why can I get correct result with this b.c.?  Best regards, Yours sincerely ShengliXu Department of Engineering Mechanics State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian, 116023, P. R. China Email:shengli@... shengli.xu.xu@... ========================== 