[Zen]

Hi everyone,

I am using timeVaryingMappedFixedValue to set an inflow boundary condition at the inlet of a straight pipe. I have defined the velocity at the cell centres and put the 'points' and 'U' file in the corresponding directories under 'constant/boundaryData'.

Since I've specified the values of the velocity at the cell centres, there should be no interpolation. However, I can see some cells present wrong U values (see attached picture, close to the walls. The blue dots at the pipe centre are correct).

Does anyone know how I can solve this problem?

Thanks in advance,

Z

P.S. I am using of-2.4.0

[Zen]

Problem solved.

I simply switched on the interpolation option 'mapMethod nearest' in the 0/U file.

I attached a picture for reference.

[aendres]

Hi,

I had a similar problem in OpenFOAM 2.3.x with very fine grids, which was resolved by adding the entry
perturb 0.0;
in the boundary condition definition.

Just a brief remark for future forum readers...