Shell element face selection or normal assignment

- January 23, 2019 at 9:07 pm
  
  yk2359
  Subscriber
  
  Hello,
  
  Is it possible to apply loads/supports on both inner & outer surface of a cylinder created as a thin membrane with certain thickness? Does shell only allows one face selection(normal vector assigned)? Please advice.
  
  Thanks,
  
  YK
- January 24, 2019 at 1:49 am
  
  peteroznewman
  Subscriber
  
  If you apply a Pressure load, you simply put a -ve sign on the magnitude if you want the pressure to be on the other side.
  
  If you are defining contact with a surface, you identify if the contact face is the Top or Bottom face of the surface to indicate which side you are defining contact.
- January 24, 2019 at 2:04 am
  
  yk2359
  Subscriber
  
  Thanks peter. I have fluid-structure interface on inner and elastic support on outer. Negative value doesn't seem to work. Any thoughts?
- February 9, 2021 at 10:27 am
  
  REZK_A
  Subscriber
  
  Hello yk2359nI'm leaving this comment so if anyone faces the same problem can solve it. nSolution : nYou have to define the prober suface normal using for example spaceclaim Follow this link to do sonhttp://help.spaceclaim.com/2015.0.0/en/Content/Displaying_Normal.htmnif your pressure is pointing to the wrong direction just reverse the normal and everything should be okn