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November 23, 2017, 14:10 |
combustion at micro scale
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#1 |
Member
tahir
Join Date: May 2010
Posts: 35
Rep Power: 16 |
I am modelling combustion at micro combustor with heptane fuel. it contain 25 species and 34 reaction. i am using laminar, simple and first order scheme with pressure based solver. I am getting higher flame temperature of more than 2500K while in experiment it is around 1700K.
Help is appreciated |
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November 22, 2018, 14:32 |
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#2 |
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9 |
hello,
Have you ever met the fluent complaining about 'divergence detected in AMG solver: temperature' before. I am doing a MICRO-combustor simulation. The mechanism is GRI 3.0 and methane surface mechanism. I have tried a lot of methods to overcome this problem. however, nothing works. Do you have some experience on how to get convergent results? thanks |
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November 22, 2018, 16:36 |
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#3 | |
New Member
Marius
Join Date: Nov 2018
Posts: 17
Rep Power: 8 |
Quote:
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November 22, 2018, 22:10 |
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#4 |
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9 |
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November 23, 2018, 01:27 |
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#5 |
New Member
Marius
Join Date: Nov 2018
Posts: 17
Rep Power: 8 |
Once I used the eddy-dissipation-model and also get a to high temperature. I changed the cp values of the species to polynomal and put the right values in and the problem was fixed
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December 3, 2018, 12:10 |
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#6 | |
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9 |
Quote:
In a lot of literatures, authors would use finite rate model for laminar micro-combustor. Did you use eddy dissipation model to solve it? |
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December 3, 2018, 12:18 |
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#7 |
New Member
Marius
Join Date: Nov 2018
Posts: 17
Rep Power: 8 |
My answer is just based on the high temperature problem, the model I solved was a different problem
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