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-   -   Changing heat source in ANSYS (https://www.cfd-online.com/Forums/ansys/221512-changing-heat-source-ansys.html)

jnow October 20, 2019 09:52

Changing heat source in ANSYS
 
Dear Colleagues,

I have got a little problem which I hope you could help with.

I would like to use heat source which is decreasing in time period (e.g. 18MW in 1 sec, 15 MW in 2 sec, etc.). It's decay heat from low-power nuclear reactor, geometry at this moment is not so important, I will just use simple geometry in 2D.

Is it possible to solve this issue in ANSYS? Does anybody know how to do it?

Thank you in advance for your help.

sheaker October 21, 2019 00:37

Hello. I believe You can use "expression" as an input (I don't have time to confirm it right now). Here is an expression I was using for varying inlet temperature. I think You can modify in for Your purpose:


Code:

300[K] + if(t>6300[s],0[K],if(t>5400[s],600[K],if(t>4500[s],0[K],if(t>3600[s],600[K],if(t>2700[s],0[K],if(t>1800[s],600[K],if(t>900[s],0[K],600[K])))))

Best regards,
Sheaker


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