I simulate the bubbles move up in the water where bubbles are regarded as the discrete phase. In the default solver, the p field is not include gravity effect. Now I add gravity effect in the p formulation and compile the solver. When I run the simulation wihout drag force, I think the gradP force works fine, but if I add the drag force, bubbles don't move up and their movement become out of order. I don't kown what is wrong with it, It's the solver problem or wrong initial conditions or any other problem?anther problem is that some bubbles can cross the draft tube wall.
Here is my solver source code, and some case settings, I will be very appreciate if you help me to solve this problem.
Thanks anyway, I am looking forward your answer.
| Attachment | Size |
|---|---|
 solver source code | 199.81 KB |
| case settings and initial conditions | 2.81 MB |
openfoam | Fri, 03/22/2013 - 15:34
I think my solver code is
I think my solver code is right and the DEM input script is appriate. So the problem maybe the case settings and initial conditions, but I cannot find the error part, Is anyone can help me?
openfoam | Fri, 03/22/2013 - 16:26
If I add drag force on the
If I add drag force on the DEM side , the flow field will be out of order, I cannot find the problem. I hope some one can give me advice, I'll be very appreciate.
openfoam | Sat, 03/23/2013 - 03:47
I have checked the
I have checked the schillernaumann drag code, there's no problem, but if I add dragforce on DEM side, why the bubble cannot move up? I used the defalut solver of modeltype B , added the Archimedes force and and schillernaumann drag on DEM side, the bubble didnot move up too, so I don't think there's somgthing wrong with my solver source code. The case setting and initial conditions is simple to setup and the DEM input script doesn't need too many change, I think the result should be OK. I missed somgthing? Hope anyone can give me any help