<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 24pt; color: #000000"><div>The mesh is 3D unstructured about a 3D cylinder. I would like to extract the surface of the cylinder.<br></div><div><br></div><div>I have experience extracting surfaces with<u> another code</u> where the surfaces are defined by a variable (-3= cylinder surface).</div><div> I do it like this:<br></div><div>1-select extract surface<br></div><div>2-select conductivity<br></div><div>3-select threshold (choose -3 which corresponds to the cylinder surface).<br></div><div><br></div><div>but I am using a code where the cylinder surface is NOT a predefined variable.<br></div><div>How do I do I extract the surface?<br></div><div>Hope my question is clear,<br></div><div>Stephen<br></div><div><br></div><div><br></div></div></body></html>