Convective term in rhoCentralFoam

alch · January 14, 2015, 09:51

Hi there,

I have got a question regarding the convection term in the momentum equation of rhoCentralFoam. This is written as:

Code:

solve(fvm::ddt(rhoU) + fvc::div(phiUp));

with surfaceVectorField phiUp. However I wonder how this works out in regard to dimensions since divergence of a vector field should be a scalar field, while ddt(rhoU) results in a vector field. What do I miss?

Kind regards

Alexander

mneben · March 12, 2015, 08:33

Hello alch,

phiUp is a surfaceVectorField. Look into line 173 of rhoCentralFoam.C.

January 14, 2015, 09:51	Convective term in rhoCentralFoam	#1
alch New Member Join Date: Jan 2014 Posts: 2 Rep Power: 0	Hi there, I have got a question regarding the convection term in the momentum equation of rhoCentralFoam. This is written as: Code: solve(fvm::ddt(rhoU) + fvc::div(phiUp)); with surfaceVectorField phiUp. However I wonder how this works out in regard to dimensions since divergence of a vector field should be a scalar field, while ddt(rhoU) results in a vector field. What do I miss? Kind regards Alexander

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March 12, 2015, 08:33		#2
mneben New Member Matthias Neben Join Date: Oct 2011 Location: Cottbus (Germany) Posts: 28 Rep Power: 14	Hello alch, phiUp is a surfaceVectorField. Look into line 173 of rhoCentralFoam.C.