[Nek5000-users] Change boundary condition type with time?

[nek5000-users at lists.mcs.anl.gov]

Hi Neks,


I wonder if it is possible to have boundary conditions that chage type with time?


I want to simulate a flow where I make a 'puff' of fluid through a hole in a wall.

After the puff is made it continues to evolve without beeing forced.


Mathematically, this is what I want:

  1.  Dirichlet boundary conditions (ux,uy,uz) = (0,0,1) for the velocity at a part B of the boundary up to a time T.
  2.  Open boundary condition for the velocity at B for time > T.


Is this possible to implement?


Best,


Johan

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/nek5000-users/attachments/20180411/a80d3e1c/attachment.html>