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[Deepak <question683336@xxxxxxxxxxxxxxxxxxxxx>]

Question #683336 on Yade changed:
https://answers.launchpad.net/yade/+question/683336

    Status: Open => Answered

Deepak proposed the following answer:
Hi,
I need to have a look at the case, boundary conditions and things to
identify why this happens (my best bet is bad physics/numerical settings),
paraFoam can be used to view parallel cases, did you have a look into the
openfoam documentation/coupling documentation? The methods to post process
parallel
cases are there ..

https://cfd.direct/openfoam/user-guide/v6-paraview/
https://yade-dem.org/doc/FoamCoupling.html#post-processing

On Fri, Sep 13, 2019 at 11:09 AM Anqi H <
question683336@xxxxxxxxxxxxxxxxxxxxx> wrote:

> Question #683336 on Yade changed:
> https://answers.launchpad.net/yade/+question/683336
>
>     Status: Answered => Open
>
> Anqi H is still having a problem:
> Hi Deepak,
>
> I'm running the same simulation with icoFoam for 0.05s, the particles
> are defined in fluidCouplingIDList and dynamic is disabled. The fluid
> case without the particles converges in openFoam, but after the
> particles are included, the simulation hangs after 0.01275s. I've been
> having trouble understanding why the program hangs here as the courant
> number is smaller than 0.5. The terminal output is copied to this post.
> Another question is about inspecting p,U properties of the fluid cells,
> since they are saved under two directories processor0,1, does it mean
> paraFoam cannot be used in this case? Thank you.
>
> Time = 0.01275
>
> Courant Number mean: 0.142852 max: 3.7703
> smoothSolver:  Solving for Ux, Initial residual = 0.560774, Final residual
> = 7.25301e-06, No Iterations 13
> smoothSolver:  Solving for Uy, Initial residual = 0.210176, Final residual
> = 8.97415e-06, No Iterations 10
> smoothSolver:  Solving for Uz, Initial residual = 0.580007, Final residual
> = 8.33788e-06, No Iterations 13
> DICPCG:  Solving for p, Initial residual = 0.87801, Final residual =
> 0.0268803, No Iterations 11
> DICPCG:  Solving for p, Initial residual = 0.0229963, Final residual =
> 0.00113944, No Iterations 9
> DICPCG:  Solving for p, Initial residual = 0.00111865, Final residual =
> 4.86087e-05, No Iterations 11
> time step continuity errors : sum local = 2.63805e-06, global =
> -2.6854e-07, cumulative = 2.84037e-06
> DICPCG:  Solving for p, Initial residual = 0.216622, Final residual =
> 0.00789831, No Iterations 10
> DICPCG:  Solving for p, Initial residual = 0.00936633, Final residual =
> 0.000371535, No Iterations 11
> DICPCG:  Solving for p, Initial residual = 0.000378234, Final residual =
> 9.57322e-07, No Iterations 17
> time step continuity errors : sum local = 3.7861e-08, global =
> 3.12631e-09, cumulative = 2.8435e-06
> ExecutionTime = 99.51 s  ClockTime = 100 s
>
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