Heaving airfoil??

quarkz

hi,

i currently 've a working 2D FVM solver. It can simulate flow past a stationary airfoil with a c-grid. i need to modify it to simulate (for a start) flow past a heaving (up/down motion) airfoil.

i've read thru some papers & messages in the forums. i believe formulating the NS eqns in the ALE form is the best way to go, and since no deformation is necessary, it is not required to apply the GCL. So these are the modifications:

1. replace original NS eqns to the ALE form with convective velocity replaced by the relative velocity (u-u(b)) where u(b)=mesh velocity 2. besides the standard BC for boundary cells, such as u=1,v=0 at the LHS of the grid for the inlet velocity, there is also a need to include the presribed velocity of the motion e.g. v=0.5 (airfoil moving up at a velocity of v=0.5) to all the boundary cells.

Is that all there is to it?

Thanks alot