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source term units - poission equation

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Old   June 6, 2011, 00:53
Unhappy source term units - poission equation
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Hi All,

I am solving negative ion conc equation (UDSI -0) and potential difference equation (UDSI-1). I have a problem in UDSI-1 source term.
The equation is => del^2(phi) = (e/epsilon)*UDSI-0
the units are => Volt/m^2 = Volt-m*(ions)
to make units consistent i devided RHS with C_VOLUME(c,t) hence it beocmes Volt/m^2 = Volt/m^2
but when i devide with cell volume UDSI-1 is diverging.
Could you please help me with this problem.

Last edited by johnwinter; June 6, 2011 at 03:18.
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