Adaptive meshing

- March 31, 2019 at 1:50 pm
  
  rumth
  Subscriber
  
  Hi Peter,
  
  Can you give me an idea (any example), how it works and how can I generate adaptive meshing in my 2D geometry?
  
  Regards,
  
  Raju.
- March 31, 2019 at 2:51 pm
  
  peteroznewman
  Subscriber
  
  Hi Raju,
  
  Do you mean Adaptive on the Mesh Details window, or do you mean Adaptive Remeshing, which is something else entirely.
  
  Please show an image of your current mesh and where you are concerned about element quality.
  
  Regards,
  Peter
- April 2, 2019 at 7:37 am
  
  rumth
  Subscriber
  
  Hi Peter,
  
  In this domain mesh quality is good where the maximum face size is 9mm. Due to the jet impingement into the liquid pool (red marked region), droplet will generate with different sizes. If droplet size is less than 9mm then it will not appear and/or resolution will not be good. So, I want, the mesh will refine with the moving of interface (gas and liquid) for good resolution. That's why I want to apply adaption meshing.
  
  Now the question is how can I apply this? Should I apply adaption meshing from fluent after initialization?
- April 2, 2019 at 10:18 am
  
  peteroznewman
  Subscriber
  
  Slice the body at a level above the highest point you want to resolve small droplets in the air, and put the two bodies into a multibody part so that Shared Topology will connect the meshes. Now you can assign 9 mm element size to one body and any smaller value to the air and liquid in the other body.
  
  I have no sense of scale for the image above. What is the diameter of the nozzle outlet? If it is 90 mm so there are 10 elements across it, that may be acceptable. If it is 9 mm so there is 1 element across the outlet, that would not be acceptable. You might get a better estimate on this from a CFD expert.