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Coupling Laminar Flow to Corona Discharge
Posted Dec 13, 2023, 8:16 p.m. EST Plasma Physics, Physics Interfaces Version 6.1 0 Replies
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Hi,
I am using COMSOL 6.1 and I am trying to model ionic wind flow, or specifically the momentum transfer from negative ions to air molecules due to corona discharge. I am trying to couple the corona discharge multiphysics (electrostatics and charge transport modules) and laminar flow module by creating a volume force (F = space charge density * electric field). However, when I type in the equation into the expression field (ct.rhoq0 * es.Ex) and (ct.rhoq0 * es.Ey) I get an error that says:
Undefined variable. - Variable: comp1.ct.rhoq0 - Geometry: geom1 - Domain: 1 Failed to evaluate variable. - Variable: comp1.spf.Fx - Defined as: comp1.ct.rhoq0comp1.es.Ex Failed to evaluate expression. - Expression: comp1.spf.Fxdvol_spatial Failed to evaluate Jacobian of expression. - Expression: (comp1.spf.Fxtest(comp1.u)+comp1.spf.Fytest(comp1.v))*(dvol_spatial)
There is only one domain so I do not understand where the error is coming from. How can I couple these three modules so I can create the volume force, F, above.
Thanks, -Ariel
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Hello Ariel Velasquez
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