electrostaticFoam tutorial with negative potential

sylvester · January 21, 2010, 11:53

Running electrostaticFoam (v. 1.6.x updated today) on the chargedWire tutorial poses no problems. When, however, the electric potential is reversed (for example by setting phi = -45000 and (in order to keep the problem physically correct) rho = -3.75e-5 at 'hole'), the solution diverges rapidly.
I expected the solution to be similar in both cases. Am I misunderstanding the physics behind this, or is this a numerical problem?

Thank you for your time.

Best regards,
Sylvester

sylvester · January 26, 2010, 06:57

*bump*

Isn't there anyone why can help me with this?

Sylvester

Quote:

Running electrostaticFoam (v. 1.6.x updated today) on the chargedWire tutorial poses no problems. When, however, the electric potential is reversed (for example by setting phi = -45000 and (in order to keep the problem physically correct) rho = -3.75e-5 at 'hole'), the solution diverges rapidly.
I expected the solution to be similar in both cases. Am I misunderstanding the physics behind this, or is this a numerical problem?

January 21, 2010, 11:53	electrostaticFoam tutorial with negative potential	#1
sylvester Member Roland Join Date: Mar 2009 Location: Netherlands Posts: 93 Rep Power: 17	Running electrostaticFoam (v. 1.6.x updated today) on the chargedWire tutorial poses no problems. When, however, the electric potential is reversed (for example by setting phi = -45000 and (in order to keep the problem physically correct) rho = -3.75e-5 at 'hole'), the solution diverges rapidly. I expected the solution to be similar in both cases. Am I misunderstanding the physics behind this, or is this a numerical problem? Thank you for your time. Best regards, Sylvester

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