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February 15, 2017, 15:22 |
mass balance in DPM, evaporated droplets and the DPM flux?
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#1 |
New Member
Zari Musavi
Join Date: Oct 2013
Posts: 9
Rep Power: 12 |
Hi,
I have injected a DPM source with mass flow rate of 0.000139211 kg/s , all particles are also evaporated BUT, when looking at the mass fluxes https://drive.google.com/file/d/0B7p...ew?usp=sharing and dpm-summary https://drive.google.com/file/d/0B7p...ew?usp=sharing, the mass of the evaporated particles are not the same! It is just 4.107e-05 kg/s as dpm-summary says. which one is the correct report? injection: pressure swirl atomizer, steady particle tracking, droplet (+non-premixed combustion) Model: 2D-Axisymmetric Swirl (so the entered droplet flow rate is the global mass rate) I appreciate if you can give me some suggestions of the mistakes. Best, Zari Last edited by Zari; February 16, 2017 at 04:24. |
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March 27, 2017, 02:11 |
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#2 |
Senior Member
Behrooz Jamshidi
Join Date: Apr 2013
Posts: 110
Rep Power: 13 |
Hi
I hope I wasn't too late. The dpm-summary is correct and must be equal to DPM mass flow if all particles are evaporated. How do u recognize all particles are evaporated? maybe some of them are trapped by other boundaries. |
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March 30, 2017, 04:58 |
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#3 | |
New Member
Zari Musavi
Join Date: Oct 2013
Posts: 9
Rep Power: 12 |
Quote:
Thank you for the reply, Regarding the particles state (scaped, evaporated, incomplete, ...) I see it during the iterations on the console. I also check it by dpm summary, and by Injection list. One thing I learnt is that the better way for the evaporated mass of particles is to use Report/volume report/Sum 2pi, on the dpm mass source in the fluid zone. Because the model is based on 2d-axisymmetric and total mass of the dpm could be integrated in this way. |
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