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how to solver perturbation equations of navier stokes equations ?

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Old   March 4, 2012, 10:19
Default how to solver perturbation equations of navier stokes equations ?
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Hi All
I want to solve perturbation equation with OF. I attached these equations.
but I don't know how to calculate the convection term. I used the bellow equation

fvVectorMatrix UperEqn
(
fvm::ddt(Uper)
+ fvc::grad(U)& Uper
+ fvc::grad(Uper)& U
- fvc::laplacian(nu, Uper)
);

solve(UperEqn == -fvc::grad(pper));


but OF debug encounter error for calculating
fvc::grad(U)& Uper and fvc::grad(Uper)& U

I would be very appreciative if someone could point me in the right direction to get this model running.

Best Regards
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Old   June 8, 2014, 17:04
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Mojtaba Amiraslanpour
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Hi,
Have you had any chance solving this?
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