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#1 |
New Member
Ya Qian
Join Date: Mar 2016
Posts: 6
Rep Power: 10 ![]() |
I am simulating a powder (using a sphere fluid region) radiated and heated by a laser beam. the beam source is added in qsadd.f in which I modified rhoe. But the simulation is terminated reporting 'negative fluid temperature'. I check the cell index with negative fluid temperature, and find that the cell is often near the surface in the void region. Anyone can help me? thanks
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#2 |
New Member
Ya Qian
Join Date: Mar 2016
Posts: 6
Rep Power: 10 ![]() |
By the way, I find that if I change the powder into a plate, simulation is OK. So I guess that the problem may relate to the geometry. But I can hardly find the exact cause nor manage to deal with it.
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#3 |
New Member
Asmaa Hassan Abdelhamid
Join Date: Apr 2016
Posts: 2
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Please , do you know how can i dissapear the negative signs of veloicty in the results of fluent ??
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#4 | |
New Member
hamed
Join Date: Sep 2022
Posts: 17
Rep Power: 4 ![]() |
Quote:
I also have the same problem and I changed and replaced a qsadd.F file in Flow-3d software v 11.0.4. But the software does not call the code. I wanted to see if anyone could provide me with the Gaussian distribution heat source code that works? I will be very grateful. |
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#5 |
New Member
Dan Hawker
Join Date: Mar 2024
Posts: 2
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I had a similar issue where my simulations terminated reporting 'negative fluid temperature'. I was applying a heat flux to a surface. In my case, all of the negative temperatures were associated with cells that had very small fluid fractions (<0.00001). I was able to fix the problem by only applying heat flux to cells above a certain fluid fraction.
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#6 | |
New Member
hamed
Join Date: Sep 2022
Posts: 17
Rep Power: 4 ![]() |
Quote:
I have sent you a private message. Please consider it. Thank you very much. |
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heat transfer |
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