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September 25, 2010, 09:39 |
multiHoleInjector
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#1 |
New Member
fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 16 |
Dear all,
Does anyone know what xyAngle, zAngle and umbrellaAngle in multiHoleInjectorProps dictionary below mean? Is the 'direction' not required? Then how the injection direction is determined? multiHoleInjectorProps { position (0.0097 0.028 0.01); xyAngle 0; zAngle 180.0; nHoles 4; umbrellaAngle 120.0; nozzleTipDiameter 1e-3; angleSpacing ( 0.0 22.5 22.5 20.0 ); Thanks in advance, Fairus |
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September 25, 2010, 15:46 |
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#2 |
Super Moderator
Niklas Nordin
Join Date: Mar 2009
Location: Stockholm, Sweden
Posts: 693
Rep Power: 29 |
http://openfoamwiki.net/index.php/Co...ctorProperties
The direction of the injecor is defined via the xy and z angles. The spray is injected around this direction with the umbrellaAngle spread around the full circle with the angleSpacing angles |
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September 26, 2010, 07:53 |
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#3 |
New Member
fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 16 |
Niklas,
Thanks for the reply. I would like to set the injection direction to be in +z direction. With unitInjector, I will set: direction (0 0 1); How can I do the same with multiHoleInjector? I can set zAngle = 0, but I've to specify a value for xyAngle, which makes the direction to be not purely in +z direction. One more, Is there any relationship between umbrellaAngle and innerConeAngle/outerConeAngle which is in the hollowConeInjectorCoeffs dictionary? Graphical explanation will be highly appreciated. Best, Fairus |
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September 26, 2010, 09:09 |
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#4 |
Super Moderator
Niklas Nordin
Join Date: Mar 2009
Location: Stockholm, Sweden
Posts: 693
Rep Power: 29 |
if you set zAngle to 0 (or 180) the value of xyAngle wont matter.
The umbrellaAngle is the angle between the individual sprays along the injector-direction. The inner/outer cone angles are the angles of an individual spray. angleSpacing is the angles between the spray centerlines in the plane perpendicular to the injector-direction. |
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September 27, 2010, 13:45 |
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#5 |
New Member
X.G. Li
Join Date: Nov 2009
Location: Bremen, Germany
Posts: 19
Rep Power: 16 |
Hallo, Niklas
I use the rhoPisoTwinParcelFoam to investigate a particle-laden gas flow. I want to calculate the total particle number across a cell surface in certain time. And then I can get a particle flux for this cell face by N/(t*A), N, the total particle number across the cell surface; t, time; A, cell surface area. I have poor knowledge about C++. May you give me some help? Thank you very much! |
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September 27, 2010, 15:48 |
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#6 | |
Super Moderator
Niklas Nordin
Join Date: Mar 2009
Location: Stockholm, Sweden
Posts: 693
Rep Power: 29 |
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