Applying upward body force on the droplet

- December 16, 2020 at 9:30 pm
  
  mehdinikfar
  Subscriber
- December 17, 2020 at 11:54 am
  
  Rob
  Forum Moderator
  
  nI can't see the mesh resolution, but given the droplet size, viscosity and surface tension do you expect it to move? n
- December 17, 2020 at 7:52 pm
  
  mehdinikfar
  Subscriber
  
  Thank you RobnI have around 400k elements and mesh is structure. I did not change the properties of water and air in Fluent database. I attached my calculations, I wrote a UDF, and now the droplet moves, but for example for droplet with 0.1 mm as the radius, I use 3000 m/s^2 on the droplet which is less than what I computed. Did I do the calculations correctly?nnnn
- December 18, 2020 at 10:45 am
  
  Rob
  Forum Moderator
  
  We're not supposed to check the maths: we're only supposed to advise on the solvers. However with 0.2mm diameter water droplets they will tend to stick to thinks given the surface tension. Check the contact angle on the wall too: that's often a source of errors as people mix the angles up. n