Is it possible in nektar++ to read the time-dependent boundary conditions from a file. Actually, I am simulating Vortex induced Vibration (VIV) of cylinder with blowing and suction from the surface.

The motion of the cylinder is defined by the flag "userdefinedtype"=movingwall which accounts for the structural dynamics under the action of fluid forces. In order to implement blowing and suction, I need to update the value of velocity field at the cylinder surface at each time step. I cannot use the flag "userdefinedtype" twice in the same boundary condition tag to introduce this time-dependence. The way i could think of to implement this idea is to the read this time-dependent boundary condition from the file. I would also need to overwrite the content of the boundary file at each time step so that i donot need to write all file corresponding to the time steps.

So, my question is, is there a way to generate the time-dependent boundary condition through a given function or by any other means, and then read the same time-dependent boundary condition from a given file for the next time step.