[odellar]

I'd like to set the velocity boundary condition of a particular boundary to vary according to a pre-determined time series signal (which I have saved in a txt file). The time series signal is based on a fixed time step (call this T), but my solver (pimpleFoam) is using a variable time step.

I have groovyBC installed which I think could be the answer.

Does anyone know how to set it to use my pre-determined time series file to prescribe the boundary condition (remembering that the solver will use a variable timestep, but that the boundary condition must evolve according to the file with fixed step T)?

Thanks

[alexeym]

Hi,

uniformFixedValue can a) read (time, (ux uy uz)) tuples from external file (you'll need to format your txt accordingly), b) can interpolate between time moments (you can select interpolation method).