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-   -   combustion, XiFoam, ignitionSphereFraction (http://www.cfd-online.com/Forums/openfoam/105316-combustion-xifoam-ignitionspherefraction.html)

achinta July 27, 2012 10:28

combustion, XiFoam, ignitionSphereFraction
 
Hello,
I am using XiFoam to simulate premixed combustion. Could someone please tell me how to create a perfectly spherical ignition point. I thought that setting ignitionSphereFraction to 1 would do the work. But, OpenFoam is creating hemispherical ignition for any values of ignitionSphereFraction. How do we control the shape of the initial ignition region?

Thanking you,
Achinta

achinta July 30, 2012 06:40

bug in creating ignition sites?
 
Hello Foamers,
I am trying to get a complete spherical ignition region by playing with different values for ignitionSphereFraction,ignitionStrength,ignitionCi rcleFraction etc. But i am always getting a quarter of a sphere.
The location of my ignition is (0.05,0,0) and the ignition diameter is 0.1 m. The ignition sphere created by openFoam extends from x=0 to x=0.1, y=0 to y=0.05 and z=0 to z=-0.05.
Is it a bug ?
Has anyone tried to create a spherical ignition region?

Thank you

Achinta


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