# [GAMBIT] meshing

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 January 13, 2013, 14:37 meshing #1 New Member   sara mehrdad Join Date: Dec 2012 Posts: 11 Rep Power: 6 Hi; i want to mesh by hex method on gambit distances between two cylinder that ones is elliptical tilt cylinder and second is circular cylinder,but i recieve error!!!please help me... thanks

 January 14, 2013, 02:28 #2 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,239 Rep Power: 34 pictures always help __________________ In memory of my friend Hervé: CFD engineer & freerider

 January 14, 2013, 03:52 #3 New Member   sara mehrdad Join Date: Dec 2012 Posts: 11 Rep Power: 6 image.png please see this image,i want mesh large cylinder volume that i subtract two elliptical and circular cylinders by hex elements but i cant,i think decomposing can help me but i dont know how?

 January 14, 2013, 03:55 #4 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,239 Rep Power: 34 same picture but in (xy) plane to see distance between both small pipes __________________ In memory of my friend Hervé: CFD engineer & freerider

 January 14, 2013, 04:13 #5 New Member   sara mehrdad Join Date: Dec 2012 Posts: 11 Rep Power: 6 image2.png dA1 is small surface element of circular cylinder and x=7.6m,distance x is between center of elliptic and center of circle tanks a lot

 January 14, 2013, 04:29 #6 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,239 Rep Power: 34 Then extend both small pipes, and split volume with sweeped surfaces. Then create 3 planes, and split volume into 4 pieces Start meshing with pipes Sans titre.png __________________ In memory of my friend Hervé: CFD engineer & freerider

 January 19, 2013, 01:43 meshing #7 New Member   sara mehrdad Join Date: Dec 2012 Posts: 11 Rep Power: 6 thanks a lot for your help but i shouldnot extend pipes because of their dimensions!!!!

 January 21, 2013, 02:24 #8 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,239 Rep Power: 34 I didn't change pipe dimensions.. as you can see the hollow doesn't go through the whole domain. I just extend the diameter of the pipe (topology), and this surface will be treated as interior, not as wall Sans titre.jpg __________________ In memory of my friend Hervé: CFD engineer & freerider

January 21, 2013, 12:18
meshing
#9
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Join Date: Dec 2012
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thanks for your help,maybe i should describe more about my problem,small pipes are wall and large cylinder is pressure farfeild,complete geometrry is consist of two small circular cylinders with D=3.8m&H=6.365m,distance between them is x=4.75m,third cylinder is elliptical&tilt cylinder H=8.596m&D1=4.686m&D2=3.0815m,rotate this cylinder 45 degree on negetive Z direction and translate y=8.1m,large cylinder treate as pressure farfeild with D=19m&H=16m,then i substract three small cylinedrs of large cylinder,i want to mesh by hex element this geometry but i cant!!!!
attachment images discribe my problem please see them
thank a lot
Attached Images
 image1.png (5.8 KB, 8 views) image2.png (5.3 KB, 4 views)

 January 22, 2013, 02:00 #10 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,239 Rep Power: 34 your geometry isn't the same as in your third post... post other view of your geometryto see how small cylinders are "intercepting" together __________________ In memory of my friend Hervé: CFD engineer & freerider

January 22, 2013, 02:18
#11
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i first create cylinders on pozitive Y axis location then make chenges.
Attached Images
 image3.jpg (31.4 KB, 8 views)

 January 22, 2013, 03:05 #12 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,239 Rep Power: 34 then it will be challenging to mesh it with full hexa (that's my point of view) __________________ In memory of my friend Hervé: CFD engineer & freerider

 January 24, 2013, 08:20 meshing error #13 New Member   sara mehrdad Join Date: Dec 2012 Posts: 11 Rep Power: 6 i try meshing by hex cooper element but recieve this error: independent loop of swept faces on volume,volnme1 had mismatched intervals assigned and thus cannot be meshed using the cooper tool

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