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Plotting Electric field gradient in COMSOL for studying the effect of Dielectrophores

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Old   November 1, 2016, 10:00
Lightbulb Plotting Electric field gradient in COMSOL for studying the effect of Dielectrophores
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I have an experimental FEM prepared for Electrophoresis and DEP study.

I am primarily using the Electrostatics physics module and Microfluidics of COMSOL module as of now.

So far i have plotted the Electric field distribution using the following equation:

sqrt(Er*Er + Ephi+ Ephi+ Ez*Ez)

Specifically: sqrt(es2.Er*es2.Er+es2.Ephi*es2.Ephi+es2.Ez*es2.Ez )

Yes, my design is in r,phi,z coordinate system as evident from the equation.

My questions:

a) I am not sure how do i plot the Electric field gradient next i.e ∇E^2. The quantity should have units of V^2/m^3.

b) Is writing the custom equation the only way to plot this?
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comsol, dielectrophoresis, electric field, fem, microfluidic

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