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Forum: ANSYS Meshing & Geometry

April 7, 2015, 10:02

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

You have set clearance volume there? ie. after...

You have set clearance volume there? ie. after the cylinder has reached the TDC, there should be a small portion left.

And why is your total volume going to .007 from .013 in zero seconds?

Forum: ANSYS Meshing & Geometry

April 7, 2015, 02:56

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

Share your UDF and engine dimensions. Most...

Share your UDF and engine dimensions. Most probably the pistion is not returning, or you haven't given clearance volume.

Forum: ANSYS Meshing & Geometry

November 22, 2014, 11:57

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

You have to enter it one by one.. define ...

You have to enter it one by one..
define
models
...
...

Forum: ANSYS Meshing & Geometry

November 30, 2011, 11:55

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

Got It. Adjusted the remeshing cell size in...

Got It.

Adjusted the remeshing cell size in the Zone defining section with .4 and 1.4 of the avg cell length. (got length as min+max /2)

Now someone tell me what this is

>...

Forum: ANSYS Meshing & Geometry

November 30, 2011, 11:06

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

TQ for the reply. I was seriously held back in...

TQ for the reply. I was seriously held back in with my project progress by this problem.

I am not using layering. using both Smoothing and remeshing.
I gave the values from the 'mesh scale...

Forum: ANSYS Meshing & Geometry

November 17, 2011, 10:43

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

I tried starting from BDC and from TDC. I am...

I tried starting from BDC and from TDC. I am getting negetive volume either way.( if from TDC then during down stroke.). I also tried reducing teh problem. Removed all vcalves, ports etc. Just a...

Forum: ANSYS Meshing & Geometry

November 14, 2011, 21:17

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

Centroid of the 'cell is beyond cell boundary...

Centroid of the 'cell is beyond cell boundary right. Not the total centroid?

How to get a good mesh? I am doing 2D so I tried meshs with equal interval size on all edges and both tri and quad...

Forum: ANSYS Meshing & Geometry

November 13, 2011, 12:40

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

First of all. I don't have any subtracted...

First of all. I don't have any subtracted volumes. ( I don't have volumes. Its 2D) Still I haven't done any face subtractions.

I don't have any interface BC either. Just 2 Vel in, 1 Pre out and...

Forum: ANSYS Meshing & Geometry

November 13, 2011, 03:40

Replies: 21

[Other] Negetive Volume during mesh motion

Views: 5,407

Posted By tsram90

Negetive Volume during mesh motion

I am Trying to stimulate a IC engine combustion using fluent.

I am getting the following error during previewing mesh motion.

Mesh Statistics:
Min Volume =4.95612e-008
Max Volume ...

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