Partial derivative of VolvectorField with respect to Temperature -- CFD Online Discussion Forums

August 4, 2020, 15:59

Partial derivative of VolvectorField with respect to Temperature

SHUBHAM9595

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MNM

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Dear Foamers,

I'm trying to add a source terms in the Energy Equation (highlighted in blue ), for which I need to compute the partial derivative of volVectorField (M) with respect to volScalarField (T)

$(\frac{\partial \textbf{M}}{\partial T}$ )

Here, M is also a separate flow variable (along with usual pEqn.H, TEqn.H and UEqn.H ) which is already being coded using a separate governing Equation as mentioned below.

$\frac{\partial \textbf{M}}{\partial t} + (\textbf{U}.\nabla)\textbf{M} = \frac{1}{2}(\Omega \times \textbf{M}) + (\textbf{M} \times \textbf{H} )\times \textbf{M} - (\textbf{M} - \textnormal{mo}\frac{\textbf{H}}{H}) \quad \textnormal{where} \quad \textnormal{mo} = \frac{constant}{T}$

Any suggestion to code the partial derivative will be really helpful.

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Last edited by SHUBHAM9595; August 7, 2020 at 09:00.

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