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Old   January 14, 2011, 11:05
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Dima Ry
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Hello,
I am new in Ansys and need to know following :
May i create nitrogen gas volume with N=10^3 ... 10^4 free electrons ? I need take into account every electron separately and every electron should have random position in the gap. So initial condition in the gas volume will look like sum of N Dirac's delta functions. After voltage appliance electron will produce separate avalanches which will grow and merge together.

The next question if following :
May i simulate barrier discharge with Ansys ? Is there a way to calculate charge distribution at the dielectric surface ?

Regards
Dmitry
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Old   January 15, 2011, 07:37
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Glenn Horrocks
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CFX does not have this built in. Can you define it using source terms?
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Old   January 15, 2011, 09:47
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Dima Ry
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Quote:
Originally Posted by ghorrocks View Post
CFX does not have this built in. Can you define it using source terms?
Initial electron distribution could be described in term of density. But conventional way uses averaged approach. That means 10^3 free electrons are avaraged within some volume. But i want to consider every electron as separate particle. After volt appliance every electron will produce separate avalanche. Does Comsol allow allow to consider every electron separately ?

Thanks for any information in advance,
Dima
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Old   January 16, 2011, 18:18
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Glenn Horrocks
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I have no idea about the capabilities of Comsol.

The particle tracking model in CFX is not really suitable for this as particle tracking assumes the key forces on the particle are viscous forces. There is no viscous forces on electrons and the key forces now are electrical. I do not think CFX is going to be very useful for you if this is what you want to do.
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