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-   -   [ANSYS Meshing] Inflation problem: Internal pipe flow with Turbulator Inserts (http://www.cfd-online.com/Forums/ansys-meshing/110347-inflation-problem-internal-pipe-flow-turbulator-inserts.html)

Zaphod'sSecondHead December 9, 2012 05:42

Inflation problem: Internal pipe flow with Turbulator Inserts
 
Hi, members! I'm new to both ANSYS-CFX and this highly informative and respected forum. Please pardon me if my inexperience comes off as ignorance.

I'm trying to simulate heat transfer to water flowing inside a copper absorber tube with turbulator inserts. The details are:

Inner Dia: 1 inch
Outer Dia: 1.125 inch
Turbulator thickness: 1 mm

Here's the model part showing the turbulator profile:
http://i.imgur.com/nki4M.png?1

..and the standard 3-view sketch:
http://i.imgur.com/KWpdi.jpg?1

Several of these parts have been assembled to a length of 1 meter:
http://i.imgur.com/XHfKo.png

Meshing Details:
Min size: 1.E-4
Max face size: 5.E-3
Max tetra size: 5.E-3

During meshing, the mesher displayed an error of inflation layers clashing with the body mesh. It says: "The Patch Conforming Tetrahedron Mesh failed due to intersection in boundary or inflation mesh Here is a picture of the resultant mesh (Mesh of outer pipe is hidden):
Front view (Notice the lack of inflation):
http://i.imgur.com/Ph0Fe.png?1

Isometric (almost):
http://i.imgur.com/50MGk.png?1

I have the following questions:
1. How do I tweak the inflation layer to adjust itself near the turbulator tips?

2. The Copper pipe was also meshed under the default setting of CFX physics preference. Will that create a problem?

Thanks!


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