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Help: Third-order MUSCL for flame propagation? |
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October 7, 2010, 13:19 |
Help: Third-order MUSCL for flame propagation?
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#1 |
New Member
Join Date: Mar 2009
Posts: 19
Rep Power: 17 |
I find this from FLUENT HELP:Compared to the second-order upwind scheme, the third-order MUSCL has a potential to improve spatial accuracy for all types of meshes by reducing numerical diffusion, most significantly for complex three-dimensional flows, and it is available for all transport equations.
But, The third-order MUSCL currently implemented in FLUENT does not contain any flux-limiter. As a result, it can produce undershoot and overshoot when the flow-field under consideration has discontinuities such as shock waves. So can I use MUSCL scheme for simulation of flame propagation? I am not sure that if the flame front has such kind of discontinuities. Thank you! |
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October 13, 2010, 08:59 |
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#2 |
New Member
sreenivasa rao gubba
Join Date: Sep 2010
Location: Leeds University, UK
Posts: 28
Rep Power: 16 |
Hi
When you say flame propagation, Can I assume it as premixed flame? Is it in 2D or 3D that you want to simulate? For instance premixed flames in turbulent situation are not continuous. However, these discontinuties are mainly dependent on your local flow field. If you are using RANS to simulate this problem, I would give it a try and see the difference with different schemes. Sree |
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October 13, 2010, 13:17 |
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#3 | |
New Member
Join Date: Mar 2009
Posts: 19
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Quote:
Thank you. I am doing 3D LES simulation of premixed flame propagation in a closed vessel. The flame undergoes laminar and turbulent regime. |
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October 13, 2010, 13:33 |
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#4 |
New Member
sreenivasa rao gubba
Join Date: Sep 2010
Location: Leeds University, UK
Posts: 28
Rep Power: 16 |
Hi
I would dare to try if my flame is in thin reaction zone regime of the combustion diagram. Again it is purely based on what u' i am using. if it is highly turbulent, i would expect discontinuties. -Sree |
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