# [GAMBIT] Can nodes in a face mesh be deleted?

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 January 1, 2012, 12:21 Can nodes in a face mesh be deleted? #1 New Member   Join Date: Dec 2011 Posts: 9 Rep Power: 5 Sometimes Gambit creates unwanted nodes due to which there merge some highly skewed small triangles. I know these triangle can be altered by moving the nodes on their vertices, but sometimes you have to move a couple of adjacent nodes and the result is not always desirable. To delete the extra nodes is obviously a good solution, but I don't know if Gambit allows it.

 January 4, 2012, 02:44 #2 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 2,992 Rep Power: 30 can you sketch an example __________________ In memory of my friend Hervé: CFD engineer & freerider

 January 4, 2012, 10:35 #3 Super Moderator     Sijal Ahmed Memon (turboenginner@gmail.com) Join Date: Mar 2009 Location: Islamabad Pakistan Posts: 3,971 Blog Entries: 6 Rep Power: 39 are you working on 2d problem?

February 3, 2012, 03:32
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Quote:
 Originally Posted by -mAx- can you sketch an example
Quote:
 Originally Posted by Far are you working on 2d problem?
Sorry for replying so late. I'd thought nobody'd replied me.
I encountered this problem when i meshed a surface on a volume. As you can see in the picture below, there are a couple of highly skewed triangles due to the existence of the nodes to which the red arrows point. As i said above, these triangle can be altered by moving the nodes on their vertices, but sometimes you have to move a couple of adjacent nodes and the result is not always desirable. However, if I deleted the two nodes, which are apparently unnecessary but i don't know why Gambit creates them, the highly skewed triangles would disappear with the red lines (i added) being the new boundaries of a few larger triangles, and the grid would be more even. but i don't know if Gambit allows deleting nodes in a existing grid.

 February 3, 2012, 03:40 #5 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 2,992 Rep Power: 30 you cannot delete those nodes. *but you can move the nodes >> http://my.fit.edu/itresources/manual...face_movenodes *when I encounter this problem, I try to move the nodes (as previously suggested), or I create a vertice on the boundary edge (near the skewed cells), and I apply a size function on the vertice. __________________ In memory of my friend Hervé: CFD engineer & freerider

 February 3, 2012, 09:31 #6 New Member   Join Date: Dec 2011 Posts: 9 Rep Power: 5 I have tried moving the nodes to alter the shapes of some highly skewed triangles, but sometimes i had to move some more nodes around them to get a desirable result. so i think it'd be a shortcut to delete those unwanted nodes. Thank you for you suggestions.

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