Problem in clearing generated mesh
 

Hi,
I imported the geometry with mesh from ICEM to STAR CCM. The problem is that, it is not possible to clear the previous mesh. I tried to change the reference value of the mesh to increase the quality of existing mesh but I could not.
Could you please help me to increase the quality of existing mesh or clear it completely.
The picture is attached.
Thanks in advance :)

The mesh problem
 

As it is seen at the picture, the mesh size is not uniformly changed. I would like to remove all the cell set and create a new one. But I do not know how. :(

Is it a volumetric mesh?
You can extract the boundary surface and make a remesh on it.

Hi again
 

Hi,
Thanks for your help, yes you were right. I did it and it worked. Now the quality of surface mesh is fine. but the cell quality of volume mesh( I use Threshold) is not high, i.e. less that 0.1.
Thanks in advance :)