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combustion, XiFoam, ignitionSphereFraction

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Old   July 27, 2012, 10:28
Default combustion, XiFoam, ignitionSphereFraction
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achinta
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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
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Old   July 30, 2012, 06:40
Default bug in creating ignition sites?
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achinta
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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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