[rpasolari]

Hello everyone,

I am trying to run a simulation of a moving mesh (solidBody motion). In my problem I need to implement boundary conditions at the outer boundary using an external lagrangian solver. this boundary has to move during the simulation.

When I try to impose movingWallVelocity B.C. for the outer patch, the boundary conditions becomes noSlip even If I specify a different value, for example:

outerBoundary 
{
        type            movingWallVelocity;
        value           uniform (3 0 0);
}

Is there any way to combine the movingWallVelocity B.C. (for correcting the fluxes) with different boundary conditions sets (fixedValues, calculated, fixedGradients etc.)

I also tried to define this boundary just with my calculated boundary conditions. But in this case the solver cannot understand that this patch as to move, and so it does not correct the fluxes giving an error in the continuity equation:

Continuity error cannot be removed by adjusting the outflow.
Please check the velocity boundary conditions and/or run potentialFoam to initialise the outflow.

If anyone knows any way to ovecome this issue it will help me a lot.

Thank you in advance!