avRho=nan

[Mamin]

Hi All,
I’m getting average density and energy nan. I have tried to change the parameters latticeL and LatticeU but didn’t help.
What could be the reason for this.

t=0.1; uMax=0; avEnergy=nan; avRho=nan

Thanks

[albert.mink]

Hi

it seems that your simulation has diverged.

Have a look in the .dat file in directory tmp and tell me the TAU

Regards

[Mamin]

I realized that this happened whrn I replaced
bc.addVelocityBoundary( superGeometry, 3, omega );
with:
bc.addPressureBoundary( superGeometry, 3, omega );
sLattice.defineRhoU( superGeometry, 3, rho, u );

for the inflow boundary condition.

Do you know why this happens? I thought I can choose velocity or pressure as boundary conditions.
Thanks

[albert.mink]

Well, you answered your question already. Do not put pressure boundary for outflow and for inflow. Wont’t work!

[Mamin]

Thank you. Would you please explain why it won’t work? I’m new to the method but since I could do that in Navier-Stokes I want to know how to make similar system in LB in order to benchmark.
(Since LB should converge to Navier-Stokes in the continuum regime)

Thanks again

[mathias]

Please, come to our spring school next year. Best Mathias

[Author]

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