- #1
Comsol_STKM
- 2
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Dear Friends !
I would really need Your help. I am currently simulating the temporal development of an interface between liquid and gas, by using Comsol Multiphysics.
The problem can be simplified in terms of a rotating central liquid pick up (a small rotating cylinder endowed with an internal Archimedean screw), which rotates inside a bigger vertical cylinder. 30% of this cylinder is full of liquid, the upper part is full of gas.
I have tried to solve the problem in this term:
1. Two phase flow, laminar, level set (chns) + Moving Mesh (ALE).
2. BOUNDARY CONDITIONS for Two phase Flow Laminar level Set:
For internal rotating walls : no_slip_CW
For the External walls of the shell: No slip
For the interface: Initial interface
Stabilisation method: (GLS)
3. Subdomain SETTING for the moving mesh:
FREE DISPLACEMENT
BOUNDARY CONDITIONS TO PREDICT THE ROTATION OF THE MESH:
ROTATE CW: Internal rotating Structure;
FIXED: External Shell
THIS IS THE ERROR I GOT:
Error: 7300
Pointwise constraints for time-derivatives are not supported.
Can somebody help me ?
Thank You, in advance !
Christiano
I would really need Your help. I am currently simulating the temporal development of an interface between liquid and gas, by using Comsol Multiphysics.
The problem can be simplified in terms of a rotating central liquid pick up (a small rotating cylinder endowed with an internal Archimedean screw), which rotates inside a bigger vertical cylinder. 30% of this cylinder is full of liquid, the upper part is full of gas.
I have tried to solve the problem in this term:
1. Two phase flow, laminar, level set (chns) + Moving Mesh (ALE).
2. BOUNDARY CONDITIONS for Two phase Flow Laminar level Set:
For internal rotating walls : no_slip_CW
For the External walls of the shell: No slip
For the interface: Initial interface
Stabilisation method: (GLS)
3. Subdomain SETTING for the moving mesh:
FREE DISPLACEMENT
BOUNDARY CONDITIONS TO PREDICT THE ROTATION OF THE MESH:
ROTATE CW: Internal rotating Structure;
FIXED: External Shell
THIS IS THE ERROR I GOT:
Error: 7300
Pointwise constraints for time-derivatives are not supported.
Can somebody help me ?
Thank You, in advance !
Christiano