Is it possible to take the Lag
Is it possible to take the Lagrangian derivative of a volVectorField (U) and (in a seperate equation) also a volScalar Field (T)? At the moment when I try to use these I get the following errors:
fvc::DDt(U) + ....
error: no matching function for call to 'DDt(Foam::volVectorField&)'
and for T:
error: no matching function for call to 'DDt(Foam::volScalarField&)'
If it is not possible can anyone suggest a solution?
Thanks in advance,
Sorry for stating the obvious,
Sorry for stating the obvious, but the substantial derivative requires a velocity field, right? Therefore in order to evaluate it, fvc:: (or fvm:: for that matter), needs access to the fluxes - that's why you need to arguments. Have a look at fvcDDt.H for the list of available function signatures.
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