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Dependent variables in Biot Poroelasticity or boundary conditions

Posted Aug 16, 2010, 4:57 a.m. EDT 0 Replies

Maria Kuteynikova
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Hi,

There are four variables when I choose Earth Science Module -> Poroelasticity -> Plane Strain, Pressure: p u2 v2 p2
Pressure in the solid frame, Vx and Vy velocities and fluid pressure (in 2D case). But I want to neglect body forces in my model.

My model is a solid cube of porous rock filled with water in the centered sphere, all the other surrounding pores are filled with air. I press it uniformly on every external boundary. But finally I get something, that it is not uniformly deformed: I've got indefinable cracks in y-direction.

I assume that the problem is with boundary conditions or it also can be some forces that act somewhere (body forces) that I didn't neglect. I've tried to check every setting carefully, but didn't find my mistake. Can anyone help me to define whether my problem is in forces or in boundary conditions?

Thanks!
0 Replies Last Post Aug 16, 2010, 4:57 a.m. EDT
COMSOL Moderator

Hello Maria Kuteynikova

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