Derive external source variable defined as a source term.
The source in advection diffusion equation for passive scalar is It evaluates spacetime function defined in lua file for the source coefficient variable and convert it to state value which is to be added to the state
Reference: Irina Ginzburg (2005), "Equilibrium-type and link-type lattice Boltzmann models for generic advection and anisotropic-dispersion equation", Advances in Water Resources, Volume 28, Issue 11
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| class(tem_varSys_op_type), | intent(in) | :: | fun |
Description of the method to obtain the variables, here some preset values might be stored, like the space time function to use or the required variables. |
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| type(tem_varSys_type), | intent(in) | :: | varSys |
The variable system to obtain the variable from. |
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| integer, | intent(in) | :: | elempos(:) |
Position of the TreeID of the element to get the variable for in the global treeID list. |
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| type(tem_time_type), | intent(in) | :: | time |
Point in time at which to evaluate the variable. |
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| type(treelmesh_type), | intent(in) | :: | tree |
global treelm mesh info |
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| integer, | intent(in) | :: | nElems |
Number of values to obtain for this variable (vectorized access). |
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| integer, | intent(in) | :: | nDofs |
Number of degrees of freedom within an element. |
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| real(kind=rk), | intent(out) | :: | res(:) |
Resulting values for the requested variable. Linearized array dimension: (n requested entries) x (nComponents of this variable) x (nDegrees of freedom) Access: (iElem-1)fun%nComponentsnDofs + (iDof-1)*fun%nComponents + iComp |