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simple 2D fan in a domain

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Old   December 28, 2024, 04:57
Default simple 2D fan in a domain
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hello
I am looking for the best simple way to simulate a fan in a 2D domain.



Solver : buoyantPimplefoam
My domain have an inlet and outlet (classical)

In this domain, I would like to introduce a fan with :
- at fan inlet the conditions of the domain
- at fan outlet a fan condition with forced speed, outlet temperature = inlet temperature ie the temperature of the domain above the fan..

No need of dynamic mesh

Has anyone seen it before ? what is the easyest way ?

thanks a lot and happy end of year !!

mat
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Old   December 30, 2024, 16:02
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Anyone have an idea please ?
Thanks à lot

Mat
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Old   January 6, 2025, 05:03
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Hey,


If you do not need the "real" behavior of the fan (with the blades, rpm, hub diameter etc), you can create cylindrical cellzone in which you apply a fixed velocity constraint matching the airflow created by your fan, if known.


If you have all the specifics about the fan, there is a fan boundary condition:


https://doc.openfoam.com/2312/tools/...d/coupled/fan/


You need to create a circular facezone matching the fan's diameter, and convert it to baffles. Check out the tutorial mentioned at the bottom of the link
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Old   January 19, 2025, 18:17
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Hi Alczem
Thanks for your reply, i have always a problem with the initial conditions, and how fixe it..
If You have an example...thanks thanks thanks

See You
Mat
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Old   January 20, 2025, 07:33
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Hey,


You should share more information about the issues you are running into, it is quite hard to tell what is wrong from your last post for instance, post your case and the error the terminal gives you.



Have you run the tutorial I mentioned (link in my last post)? If you have not, please do and study the files, it will help you more than I can.
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