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Old   October 7, 2010, 12:19
Default Help: Third-order MUSCL for flame propagation?
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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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Old   October 13, 2010, 07:59
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sreenivasa rao gubba
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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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Old   October 13, 2010, 12:17
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Quote:
Originally Posted by sreerao View Post
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
Hi, Sree

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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Old   October 13, 2010, 12:33
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sreenivasa rao gubba
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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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