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BCON_CNTCT
general setting of contact boundary conditions
In MESHFREE, there is the possibility to model multiphase flows by explicit interphase conditions. The keyword BCON_CNTCT specifies corresponding coupling conditions for participating chambers in such a multiphase flow.
The general syntax is
BCON_CNTCT($BCflag$,%ind_Variable%) = RightHandSideExpression
applying the coupling condition on the RightHandSide for the variable %ind_Variable% to the boundary with boundary tag $BCflag$ whenever pointwise contact is detected, i.e. for a point of one chamber there exists a point of another chamber in close proximity.
Contact detection between chambers is only turned on if setting:
PHASE_distinction = 'YES'
Contact can either occur between regular boundaries of two chambers or free surface points of two chambers.
However, contact cannot appear between a free surface point of one chamber with a regular boundary point of another chamber.
An example is found in tut3d_10.
Note: For most cases, we recommend using the Darcy approach, see TwoPhaseDarcy, instead of explicit interphase conditions.
| List of members: | |
|---|---|
| %ind_T% | temperature boundary conditions at interfaces |
| %ind_v(1)% | velocity boundary conditions at interfaces |
| %ind_p% | hydrostatic pressure boundary conditions at interfaces |
| %ind_p_dyn% | dynamic pressure boundary conditions at interfaces |