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3D Simulation of an Oil Pump

  • Started 1 year ago by ComsolSteiermark : : Current there are 1 post :
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    Posted 2 weeks ago #
  2. ComsolSteiermark
    Member

    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

    Posted 1 year ago #

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