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Using 1D Wall Thickness Model correctly

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Old   July 20, 2021, 04:50
Default Using 1D Wall Thickness Model correctly
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Maximilian Ringel
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Hello,
I want to simultate a pipe heat exchanger. That means we have got solid material and in that solid material we have got a pipe where a fluid flows. The pipe wall is also included in that model as a solid part. When meshing this geometry I found out, that I have way too much elements (up to 9 million) which is mainly caused by meshing the pipes wall.

I noticed that Ansys Fluent ist able to simultate the wall thickness with a 1D model. By doing so I can delete the solid pipe wall, which will save a lot of elements. I made a test model to see if I can get the same results. But I found out that no matter which wall thickness I type in there, it does not change the results of my model. I get quite close to the results I had with the solid wall pipe. But looking at the temperature plot across the geometry the thermal conductivity in the 1D wall is completly different and does not match with my other model. Can someone tell me how to use the wall thickness model correctly so that I get the same results.
I am using Ansys 2020 R1.



Thanks for that.
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