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April 28, 2005, 03:43 |
Hello,
What is the method i
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#1 |
New Member
Chalothon Thumthae
Join Date: Mar 2009
Posts: 13
Rep Power: 17 |
Hello,
What is the method in ignition process of solver XiFoam and engineFoam? when I run a model with engineFoam and compare result with experiment, pressure from simulation result is rise before the experiment. Does it mean ignition method in openFoam does not include ignition delay? and What is "strength" parameter in combustionProperties ? please give me for suggestion. Torn |
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April 28, 2005, 04:03 |
The best way to understand the
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#2 |
Senior Member
Join Date: Mar 2009
Posts: 854
Rep Power: 22 |
The best way to understand the ignition modelling used in XiFoam and engineFoam is to study the source code and write down the equations being used. You will find everything you need in
OpenFOAM-1.1/applications/solvers/combustion/XiFoam OpenFOAM-1.1/applications/solvers/combustion/engineFoam OpenFOAM-1.1/src/engine/ignition OpenFOAM-1.1/src/engine/include/StCorr.H |
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September 30, 2008, 05:48 |
Dear All
Currently I am wor
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#3 |
New Member
Vijayaratnam Piradeepan
Join Date: Mar 2009
Posts: 6
Rep Power: 17 |
Dear All
Currently I am working in XiFOAM. Please let me know, what the unit of ignition strength in combustion properties is. Thank you Vijay |
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February 12, 2009, 03:39 |
hi i am from india i am new to
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#4 |
New Member
pavan
Join Date: Mar 2009
Location: BANGALORE, KARNATAKA, INDIA
Posts: 7
Rep Power: 17 |
hi i am from india i am new to openfoam i am solving methane combustion problem, i am facing difficulty while assigning fields and solving please can u help me... or for reference can u send one combustion solved problem..
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June 4, 2011, 03:04 |
Ignition points?
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#5 |
Member
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Hi, maybe one of you can help me, I too want to know the units of the ignition strenght and how I can define more ignition points in the combustion properties ?
best regards FG
__________________
Felipe G |
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July 29, 2011, 03:47 |
ignition properties
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#6 | |
New Member
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Quote:
Hi Foamers, I have read ignite.H and found that bEqn updated to new value: " bEqn = bEqn + Strength *cellVolume * rhou / duration " for ignite cells. These anybodys know the perspective on physics of this formula? Would you please help me on ignition properties e.g. strength, diameter and timing for carbon rod igniter. Last edited by timaji; August 20, 2011 at 14:54. |
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June 5, 2013, 13:56 |
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#7 | |
Member
Camille
Join Date: Oct 2012
Posts: 54
Rep Power: 13 |
Does anyone know how can I know the quantity of energy involved in the ignition in function of the parameters (strength, duration, ...) ?
I m also looking for an explaination of the meaning of strength assuming b is a dimensionless number, I thought I could find the unity of strength from the next equation but Im not sure... Quote:
rhou [kg/m³] duration [s] b[ignSite] and bEqn [-] strength [?] Then : [-] = [?] *[m³]*[kg/m³] / [s] --> [?] = [s/kg] but it means nothing for me physically in this context... for sur I am wrong but where? maybe rhou is not what I think? Thank you for your help, Cam |
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