When to apply free slip boundary condition?

- May 3, 2019 at 3:28 pm
  
  bhu2727
  Subscriber
  
  Hi,
  
  Can someone explain me when should I apply free-slip boundary condition and why?
  
  I am simulating rise of air bubble through glycerine, while trying to match the results from a research paper. In the paper for left and right wall no-slip boundary condition was applied. When I tried same simulation, I reduced whole domain into half and applied symmetry BC to left wall and no-slip BC to right wall but I didn't get the same results. When I changed the the BC of left wall to slip I got exact results, why did this happen? Also is no-slip BC for bottom wall ok?
- May 7, 2019 at 11:02 am
  
  Rob
  Forum Moderator
  
  Slip means you remove friction so don't see a change in velocity near the wall.