EWF that affects the core fluid

- September 10, 2019 at 6:56 pm
  
  Renard
  Subscriber
  
  HI,
  
  Is it possible that the eulerian wall film affects the core fluid so I could get the lift and drag affected in the wet condition?
  
  king regards
- September 13, 2019 at 1:53 pm
  
  Rob
  Forum Moderator
  
  The film only effects the near wall cell, and is assumed to have no thickness as far as blockage is concerned. Have a look into the model theory & limitations: it's all explained in more detail.
- September 13, 2019 at 2:40 pm
  Renard
  Subscriber
  what do you mean with only affects the near-wall cell? the wall cell?
  
  What is blockage?
  
  many thanks
  
  I got this limitations:
  The following limitations exist for the Eulerian Wall Film model:
  - The Eulerian Wall Film model is available for 3D geometries only.
  - Many models (for example, VOF multiphase flow or radiation) will not interact correctly with the film model without first modifying the boundary conditions using UDFs.
  - Wallfilm behavior at junctions with baffles (zero-thickness walls) may lead to unphysical results due to the local mesh topology (wall, wall-shadow) and should be used with care, that is, isolated film walls must not share a common edge.
  - The wall film can only be single-component, but not multi-component.
  - The Eulerian Wall Film model is not compatible with non-conformal interfaces.
  - The Eulerian Wall Film model is not compatible with mesh operations in Fluent (such as mesh adaption, cell separation, face zone extrusion, and cell zone type change).