<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi All,<br><br>I would appreciate help with these two questions:<br><br>1. For CFD purposes I want to mesh a model (its boundary) plus a surrounding cuboid volume (a box) around it. In the interior of the cuboid and away from the model boundary I want a coarser mesh, that is, larger elements. The model is given as an STL file. How do I do that?. Do I need to define the cuboid in Gmsh?.<br><br>2. How can I label different faces of the STL model?. The Gmsh tutorial shows how to define and label `Physical Surfaces' but only with models created with the Gmsh `Geometry' module.<br><br>Cheers,<br>Mike.</td></tr></table><br>