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Showing results 1 to 11 of 11 Search took 0.00 seconds. Search: Posts Made By: murx

Forum: ANSYS Meshing & Geometry August 15, 2012, 12:37

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx Yes, I guess you are right. Although the... Yes, I guess you are right. Although the irregularities only occour directly on the sphere surface and not along the whole block-edge and only when the sphere is rotating. But still... I also do...

Forum: ANSYS Meshing & Geometry August 15, 2012, 06:59

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx Yes it is laminar. The y+ value is very well... Yes it is laminar. The y+ value is very well below 1. Double precision also did not make any difference in my simulations. flotus1 sent me his fluent file. Unfortunately, I was able to discover a...

Forum: ANSYS Meshing & Geometry August 14, 2012, 07:16

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx there you go... the new blocking and pressure... there you go... the new blocking and pressure profile. still sudden pressure changes at the block edges. any other suggestions? i know you don't expect the radial deviation of the surface elements...

Forum: ANSYS Meshing & Geometry August 14, 2012, 05:24

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx I am absolutely sure it stays laminar. For the... I am absolutely sure it stays laminar. For the sphere, the creeping flow assumption ist almost applicable. The blocking strategy that you described works fine if the sphere is in a square. In my...

Forum: ANSYS Meshing & Geometry August 14, 2012, 04:31

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx The pipe Reynolds number in the case is 100.... The pipe Reynolds number in the case is 100. However i investigate the range of 1 to 100 and I get the same problem for all Re. As far as the sphere reynolds number is concerned things are more...

Forum: ANSYS Meshing & Geometry August 14, 2012, 02:44

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx Alex: This is strange... I have to think about... Alex: This is strange... I have to think about that. Whats the angular velocity of your sphere? Far: You can see two different blocking strategies that I tried in the pictures attache to my first...

Forum: ANSYS Meshing & Geometry August 13, 2012, 14:13

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx Thanks for all the effort! I actually... Thanks for all the effort! I actually already tried to do the simulations in FLUENT because of that problem. But I had the same situation in FLUENT. Can you check the shape of the sphere in...

Forum: ANSYS Meshing & Geometry August 13, 2012, 07:15

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx I was able to drastically increase the accuracy... I was able to drastically increase the accuracy of the mesh by setting the "project to Bspline" option in the meshing options. The radius range of the surface elements is a lot smaller now, see...

Forum: ANSYS Meshing & Geometry August 10, 2012, 10:24

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx The wall normal resolution is uniform due to the... The wall normal resolution is uniform due to the blocking topology. I cannot tell the y+ value from my mind since I was not aware that it is important for laminar flow. I attached cross sections...

Forum: ANSYS Meshing & Geometry August 10, 2012, 07:48

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx What exactly do you mean by inflation coming off... What exactly do you mean by inflation coming off the sphere? If you are refering to the node spacing on the edges that come off the sphere, then yes - they are uniform. Especially in the case of...

Forum: ANSYS Meshing & Geometry August 9, 2012, 03:55

Replies: 25 [ICEM] meshing a sphere - large deviation from perfect sphere Views: 5,257 Posted By murx meshing a sphere - large deviation from perfect sphere Hi, I am simulating a laminar flow around a rotating sphere using CFX. However I get an unphysical pressure profile on the sphere, see first attached picture. The pressure profile is wiggly and...

Showing results 1 to 11 of 11

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