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Forum: OpenFOAM

June 9, 2011, 03:01

Replies: 22

DU/DT value?

Views: 4,332

Posted By nimasam

div (phi, U) = (m^3/s)*(m/s)/ m^3 so its (m/s^2) ...

div (phi, U) = (m^3/s)*(m/s)/ m^3 so its (m/s^2)

look into definition of divergence:)

Forum: OpenFOAM

June 8, 2011, 16:31

Replies: 22

DU/DT value?

Views: 4,332

Posted By nimasam

whats wrong with m/s^2 ?

whats wrong with m/s^2 ?

Forum: OpenFOAM

June 8, 2011, 16:05

Replies: 22

DU/DT value?

Views: 4,332

Posted By nimasam

phi is not rho*U , it is U & sf() sf() :...

phi is not rho*U , it is U & sf()
sf() : surface vector
so
U (m/s) and sf (m^2) so phi is (m^3/s), ok?

Forum: OpenFOAM

June 6, 2011, 16:43

Replies: 22

DU/DT value?

Views: 4,332

Posted By nimasam

no its not!!!!!! it is just DU/DT not D(rho U )/DT

no its not!!!!!! it is just DU/DT not D(rho U )/DT

Forum: OpenFOAM

June 6, 2011, 11:49

Replies: 22

DU/DT value?

Views: 4,332

Posted By nimasam

volVectorField DDtU ( IOobject ...

volVectorField DDtU
(
IOobject
(
"DDtU",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::AUTO_WRITE
...

Forum: OpenFOAM

June 3, 2011, 16:46

Replies: 22

DU/DT value?

Views: 4,332

Posted By nimasam

look in UEqn, something like volVectorField...

look in UEqn, something like
volVectorField DuDt= fvc::ddt(U) +fvc::div(phi,U)

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