# meshing the bed of a channel

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 March 2, 2010, 11:47 meshing the bed of a channel #1 Senior Member   Join Date: Jan 2010 Posts: 110 Rep Power: 9 Hi all. I am modeling a rectangular channel where the bed is composed of a triangular format. I have used the Patch Independent Method. I pretend to refine the mesh near the bed. Which is the more effectively way of doing that? I have tried to use the sphere of influence but i don`t think itīs a comfortable way of doing what I pretend. Any suggestions that might help me? Best Regards.

 March 2, 2010, 12:14 #2 Senior Member   Join Date: Jan 2010 Posts: 110 Rep Power: 9 In conclude, actually what I want it`s to have more triangular elements near the bed in order to get the zone of higher gradients. Regards

 March 3, 2010, 10:27 #3 Retired from CFD Online     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,665 Blog Entries: 1 Rep Power: 39 You can right click on the mesh branch to insert sizing... Just set a smaller size on the triangle surface. (change to the face picker and select the face). Simon

 March 4, 2010, 11:42 #4 Senior Member   Join Date: Jan 2010 Posts: 110 Rep Power: 9 Dear Simon: Thanks a lot for your suggestion. I have followed what you mentioned but something really strange had happened.I have tried face sizing with 2 mm for the element size but when I click in the mesh branch I can`t see the body and neither the mesh . These are the the main features of my problem: The channel has 1.7 m in the longitudinal direction, 0.3 m of width and 0.14 m of height; The bed consists of the contour of triangles (the base of the triangles "doesn`t exist") with 4.61 mm sides (just two sides). The space between the triangules is 1.54 mm. I pretend to have 3/4 tetra elements in the sides of this triangules. My inputs at the moment are: Min size = 6 mm; Max Face Tet = 8 mm; Mat Tet Size = 10 mm. Do you know why this is happening?Any suggestions? Best Regards

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