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Heat Ex-changer Meshing and BC Setups

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Old   November 23, 2017, 10:09
Default Heat Ex-changer Meshing and BC Setups
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sivakumar selvaraju
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Hi CFD Experts,
Currently I started working on the heat ex-changer.

I have attached the figure for reference, please have a look and help me to sort out the problem.

I have few questions,

In actual there are two zones first one is hot fluid ( exhaust gas ), second one is coolant (water).

I am using Gambit for meshing (95 % Hex mesh). the issue what i am facing is that,
1) is there any special way to treat this two zones in Gambit?
I have defined zones in Gambit, but in fluent I unable to see them.
2) In my case I have extended surfaces (fins), how to treat them? I have given it as wall.
3) Also I need to know, how to separate them (two zones)

If anybody is interested to see the mesh, I can send the link.

Please have a look at the fig, and help me to solve it.

Thanks,
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File Type: jpg IMG-20170927-WA0005.jpg (53.1 KB, 5 views)
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Old   December 4, 2017, 12:09
Default Heat Exchanger issue
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sivakumar selvaraju
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Hi All,
I tried to fix the problem which I posted early, but no success.
The problem what I want to solve is Engine exhaust heat ex-changer
I am using Gambit for pre processing, Ansys 17.2 for processing
Pre processing

I defined 3 zones i) hot fluid ii) cold fluid iii) Fins
the mesh is good enough for initial stage.

hot fluid - Fluid zone
cold Fluid - Fluid zone
Fins - Wall

it is a counter flow HE,

I couldn't see the cold fluid moments and temperature distribution.
I am not sure where i am doing mistake.

I kindly request the heat transfer experts please help me to solve the problem.

I have attached the case for your check.

Please find the case folder in the below link

https://www.sendspace.com/file/nw4t70


Thanks,
Sivakumar
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