06 March 2019
- Last edited 06 March 2019
Hi, thanks for reply!
I'm simulating a water droplet (D0=2.5mm) impacting on a solid surface (static contact angle =101 deg) with an initial velocity (V=0.5m/s) and trying to see its spreading and receding on the surface.
The set up I'm currently using is: Multiphase: VOF; Viscous: Laminar; Materials: Air and Water; Surface Tension: CSF model; Enabled wall adhesion: contact angle=101. The minimum size of the original mesh is 20 micron. I have been able to get some good calculation results from this setting and the regular mesh.
But when I try to use adaptive mesh around the interface (with the aim to better resolve the interface), the impacting droplet appears with an abnormal interface shape. I'm using dynamic gradient adaption (normalized). The refine threshold was set as 0.1 and the coarsen threshold was 0.01. It's like the mesh is adapted correctly: the adaptive region always moves with the interface. But the results turn out to be wrong somehow.
The zoomed-in of the adapted mesh is inserted as below: