<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hello,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I try to create a boundary layer around a blade of a hydraulic turbine with gmsh.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>According to the paper “Gmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities” (page 18-19) gmsh is able to create such a layer from a set of source surfaces. For me it is not really clear how to do it. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Has anybody an example geo file?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Furthermore I want to do that with my own written subclasses of GEdge, GFace and GVertex using gmsh as a library. Is this also possible? Currently I created a 3-d mesh of my channel using my own written classes successfully. However I’m in trouble with the boundary layer creation around the blade, hub and shroud.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Any help is really appreciated.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Many Thanks<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Alex<o:p></o:p></span></p></div></body></html>