A typical transport equation takes the form:
\[ \frac{D}{Dt}x = S(x) \]
where the source, \( S(x) \), is decomposed into explicit and (linearised) implicit contributions
\[ S(x) = \underbrace{S_u}_{\mathrm{explicit}} + \underbrace{S_p x}_{\mathrm{implicit}} \]
The source is available as a general option, specified using:
generalSource { type <type>SemiImplicitSource; ... volumeMode absolute; // absolute | specific injectionRateSuSp { <field> (<explicit value> <implicit coefficient>); ... } }
Where
scalarSource { type scalarSemiImplicitSource; duration 1000.0; selectionMode all; volumeMode absolute; injectionRateSuSp { k (30.7 0); epsilon (1.5 0); } }
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