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September 17, 2016, 13:39 |
EEqn.H
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#1 |
New Member
S Atkinson
Join Date: Mar 2015
Posts: 14
Rep Power: 11 |
Hi All,
I have been trying to understand the EEqn.h using http://cfd.direct/openfoam/energy-equation/ and the file itself. From the file; fvScalarMatrix EEqn ( fvm::ddt(rho, he) + fvm::div(phi, he) + fvc::ddt(rho, K) + fvc::div(phi, K) + ( he.name() == "e" ? fvc::div ( fvc::absolute(phi/fvc::interpolate(rho), U), p, "div(phiv,p)" ) : -dpdt ) - fvm::laplacian(turbulence->alphaEff(), he) == rho*(U&g) + radiation->Sh(thermo) + fvOptions(rho, he) ); I fully understand the LHS and the process that is happening there from the website. I am a little confused why I, the Identity tensor gets swapped in it becomes U in equation 12. Following this I want to know what rho*(U&g) is in physical terms. I understand that rho*g gives joules, which makes sense, but what is rho*U kg/m2.s. Thanks, satkinson |
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