What i am i doing wrong?

fabien96 · April 30, 2019, 07:56

Hi,

I have created a mesh based on another mesh. The mesh is similar in terms of shape and geometries. The Quality of the mesh is less however i'm not sure when i run both meshes on fluent with all the same Boundary conditions, model, parameters i get different contours. the pictures are provided below.

LuckyTran · April 30, 2019, 10:50

They look very different, so I am tempted to say even a bad mesh cannot explain the difference. Probably it is a difference in setting not mimicked properly in your new case. For example, is your new mesh scaled to the same dimension? Does it have the same LengthxWidthxHeight in meters? Definitely spend some time double/triple checking the setttings.

fabien96 · April 30, 2019, 11:10

Sorry, the main problem im trying to solve is with the fact that the heat from the bottom hasn't transfered upwards. Im not quite sure if its the mesh i made in pointwise or something not set right in fluent.
The mesh was make up in parts in pointwise and is shown below.

Thank you for your reply.

AlexanderZ · May 2, 2019, 00:16

most likely parts of your model are disconnected from each other, they may look connected but have there own faces on the boundary. so you should delete duplicated faces.
Use other mesher, which do it automatically for instance workbench mesher, which is pretty simple

best regards

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April 30, 2019, 10:50		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	They look very different, so I am tempted to say even a bad mesh cannot explain the difference. Probably it is a difference in setting not mimicked properly in your new case. For example, is your new mesh scaled to the same dimension? Does it have the same LengthxWidthxHeight in meters? Definitely spend some time double/triple checking the setttings.

May 2, 2019, 00:16		#4
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	most likely parts of your model are disconnected from each other, they may look connected but have there own faces on the boundary. so you should delete duplicated faces. Use other mesher, which do it automatically for instance workbench mesher, which is pretty simple best regards