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What's the appropriate combustion solver to use ? |
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July 17, 2020, 05:09 |
What's the appropriate combustion solver to use ?
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#1 |
New Member
Giorgio Alessandroni
Join Date: Jul 2020
Posts: 7
Rep Power: 6 |
Hello everyone, I am a Mechanical Engineering student working on my thesis.
I am new with OpenFoam and I have a problem in choosing a combustion solver. My task is to study a premixed combustion in a quiescent chamber. So my question is: what's the appropriate combustion solver to use ? Any help is appreciated. Thank you in advance. Regards |
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July 17, 2020, 11:53 |
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#2 |
Member
Ran
Join Date: Aug 2016
Posts: 69
Rep Power: 10 |
Code:
I just copy paste some introduction from of/7 PDRFoam ------- Solver for compressible premixed/partially-premixed combustion with turbulence modelling. Combusting RANS code using the b-Xi two-equation model. Xi may be obtained by either the solution of the Xi transport equation or from an algebraic expression. Both approaches are based on Gulder's flame speed correlation which has been shown to be appropriate by comparison with the results from the spectral model. Strain effects are incorporated directly into the Xi equation but not in the algebraic approximation. Further work need to be done on this issue, particularly regarding the enhanced removal rate caused by flame compression. Analysis using results of the spectral model will be required. For cases involving very lean Propane flames or other flames which are very strain-sensitive, a transport equation for the laminar flame speed is present. This equation is derived using heuristic arguments involving the strain time scale and the strain-rate at extinction. the transport velocity is the same as that for the Xi equation. For large flames e.g. explosions additional modelling for the flame wrinkling due to surface instabilities may be applied. PDR (porosity/distributed resistance) modelling is included to handle regions containing blockages which cannot be resolved by the mesh. XiEngineFoam ------------ Solver for compressible premixed/partially-premixed combustion with turbulence modelling. Combusting RANS code using the b-Xi two-equation model. Xi may be obtained by either the solution of the Xi transport equation or from an algebraic expression. Both approaches are based on Gulder's flame speed correlation which has been shown to be appropriate by comparison with the results from the spectral model. XiFoam ------ Solver for compressible premixed/partially-premixed combustion with turbulence modelling. Combusting RANS code using the b-Xi two-equation model. Xi may be obtained by either the solution of the Xi transport equation or from an algebraic expression. Both approaches are based on Gulder's flame speed correlation which has been shown to be appropriate by comparison with the results from the spectral model. Strain effects are encorporated directly into the Xi equation but not in the algebraic approximation. Further work need to be done on this issue, particularly regarding the enhanced removal rate caused by flame compression. Analysis using results of the spectral model will be required. For cases involving very lean Propane flames or other flames which are very strain-sensitive, a transport equation for the laminar flame speed is present. This equation is derived using heuristic arguments involving the strain time scale and the strain-rate at extinction. the transport velocity is the same as that for the Xi equation. chemFoam -------- Solver for chemistry problems, designed for use on single cell cases to provide comparison against other chemistry solvers, that uses a single cell mesh, and fields created from the initial conditions. coldEngineFoam -------------- Solver for cold-flow in internal combustion engines. fireFoam -------- Transient solver for fires and turbulent diffusion flames with reacting particle clouds, surface film and pyrolysis modelling. reactingFoam ------------ Solver for combustion with chemical reactions. |
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July 17, 2020, 13:40 |
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#3 |
New Member
Giorgio Alessandroni
Join Date: Jul 2020
Posts: 7
Rep Power: 6 |
Hi random_ran ! Thank you so much for your rapid answer.
So PDRFoam and XiFoam seem apparently to be equal. Do you think XiFoam is appropriate for my study in order to analyze the premixed combustion process in a quiescent chamber ? I would like to vary the initial conditions in terms of pressure, temperature and equivalence ratio and determine the output pressures and temperatures inside the chamber as well as the flame front propagation. thank you in advance |
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July 20, 2020, 06:11 |
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#4 |
New Member
Giorgio Alessandroni
Join Date: Jul 2020
Posts: 7
Rep Power: 6 |
Nobody ? Is there anyone else who could answer my questions ?
Any help is appreciated. Thank you for your time |
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