yjhp1016
commented
1 year ago Hello, thanks for your interest, yes, I feel the same, it's due to periodic boundary conditions for velocity field and also the capillary force is bigger than inertia force, so it looks like there is some spontaneous imbibition for blue phase. I remember that I implement a forced-recoloring at the inlet/outlet to force the color of fluid become blue/red.
you can try to set these two lines like this to force the inlet as blue and outlet as red: (also probably you need to lower surface tension and/or increase body force to allow the fluid going to the geometry a little bit faster) 😀 bc_psi_x_left, psi_x_left = 1, -1.0 # boundary condition for phase-field: 0 = periodic, bc_psi_x_right, psi_x_right = 1, 1.0 # 1 = constant value on the boundary, value = -1.0 phase1 or 1.0 = phase 2
On Tue, 21 Mar 2023 at 05:15, Ffffffffffly @.***> wrote:
Dear Dr.Yang, I am a LBM learner about multiphase flow in porous media. Your work is so excellent, and we can spend more time in the physicis problem itself. When I run the 'lbm_solver_3d_2phase.py' in the folder '2phase', something strange happens. The invading phase is appeared at the outlet after 10000 steps, but the invading phase doesnot breakthrough at that moment. Is this caused by the small body force when using periodic boudary condition?
[image: image] https://user-images.githubusercontent.com/92718998/226521430-a994a64a-26ad-4cd2-995b-47330932cfb1.png
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Flyyyyyyyy22
renxiaosa00
gxw-ll
Dear Dr.Yang, I am a LBM learner about multiphase flow in porous media. Your work is so excellent, and we can spend more time in the physicis problem itself. When I run the 'lbm_solver_3d_2phase.py' in the folder '2phase', something strange happens. The invading phase is appeared at the outlet after 10000 steps, but the invading phase doesnot breakthrough at that moment. Is this caused by the small body force when using periodic boudary condition?