Inlet Velocity BFL rule boundary condition
This is taken from the paper: "One-point boundary condition for the lattice Boltzmann method", by M. Junk and Z. Yang published in Physical Review E 72 (2005) and leads to the chapter 'B. BFL rule'. This boundary condition shall be an improvement of the already existing velocity bounce back condition. It introduces a term called . This one represents the particle distribution:
This boundary condition has error of 1st order velocity and less 1st order pressure tested for wall is located exactly at q=1/2.
Like for velocity_bounceback_qval we compute the values at the boundary points.
Main differences to velocity_bounceback: - implemented "link-wise", only incoming links at the boundary are updated for each time step - uses q-Values in pre-processing (see mus_bc_header_module) - computes state values at the boundary nodes instead of barycentre position - can be an improvement of the bounce back rule for q-values ~= 0.5
This subroutine's interface must match the abstract interface definition boundaryRoutine in bc/mus_bc_header_module.f90 in order to be callable via fnct function pointer.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| class(boundary_type) | :: | me |
global boundary type |
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| real(kind=rk), | intent(inout) | :: | state(:) |
Current state vector of iLevel |
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| real(kind=rk), | intent(in) | :: | bcBuffer(:) |
state values of boundary elements of all fields of iLevel |
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| type(glob_boundary_type), | intent(in) | :: | globBC |
scheme global boundary type |
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| type(tem_levelDesc_type), | intent(in) | :: | levelDesc |
iLevel descriptor |
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| type(treelmesh_type), | intent(in) | :: | tree |
Treelm Mesh |
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| integer, | intent(in) | :: | nSize |
size of state array ( in terms of elements ) |
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| integer, | intent(in) | :: | iLevel |
the level On which this boundary was invoked |
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| type(tem_time_type), | intent(in) | :: | sim_time |
global time information |
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| integer, | intent(in) | :: | neigh(:) |
connectivity array corresponding to state vector |
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| type(mus_scheme_layout_type), | intent(in) | :: | layout |
stencil layout information |
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| type(mus_field_prop_type), | intent(in) | :: | fieldProp |
fluid parameters and properties |
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| integer, | intent(in) | :: | varPos(:) |
pointer to field variable in the state vector |
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| integer, | intent(in) | :: | nScalars |
number of Scalars in the scheme var system |
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| type(tem_varSys_type), | intent(in) | :: | varSys |
scheme variable system |
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| type(mus_derVarPos_type), | intent(in) | :: | derVarPos |
position of derived quantities in varsys |
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| type(mus_physics_type), | intent(in) | :: | physics |
scheme global boundary type |
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| integer, | intent(in) | :: | iField |
current field |
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| type(mus_mixture_type), | intent(in) | :: | mixture |
mixture info |