[Nek5000-users] Time-dependant boundary condition

How should I impose time-dependant BC for velocity on the left vertical boundaty for a 2D box geometry. The velocity profile should be Vx=cos(pi*y)*cos(2*pi*t) Vy=0 To illustrate the idea here are the pictures. Instead of constant velocity Vx=c on the left (inflow) boundary of a channel V __________________ | | | |__________________ I would impose Vx=cos(pi*y)*cos(2*pi*t) so for t = 0 velocity profile is ____________________ \ \ \ \_________________ for t=1 velocity profile is _________________ / / / /____________________ and so on. I know it should be possible in nek5000, but still not very familiar with syntax and fortran. Thank you in advance.