[Bordal]

Hello,
I am simulating oscillating flow in the domain, I am doing that by applying a pressure difference at the inlet and outlet to achieve the desired velocity.
Unfortunately I struggle with the occurrence of singularities in the domain causing the solution to explode, I was advised to define the inlet velocity at one side in addition to the pressure difference. Is this possible with type pressureInletOutletVelocity or pressureNormalInletOutletVelocity?
I've tried changing the line
value uniform (0 0 0);
to include table, but haven't figured out the right syntax.
In advance thanks