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AC electrothermal flow pumping - ACET body force ?!!
Posted 16 apr 2020, 09:13 GMT-4 Low-Frequency Electromagnetics, Heat Transfer, Microfluidics Version 5.4 0 Replies
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I am simulating AC electrothermal effect for fluid mixing/pumping in simple design of chamber with 2 electrodes over silicon substrate. I used Electric current module + heat transfer in solids & fluid + laminar flow with electromagnetic heating Multiphysics to couple between EC and HT.
There is equation to be used as volume force that drag the fluid with permittivity and conductivity gradients resulting from AC applied signal. 2 Photos of equation is attached. no 1: Force equation represented by gradients of permittivity and conductivity no2: same equation but represented by change in Temperature gradient
I am stuck with writing any of the 2 equations in Comsol
What I know is that I can add all parts of equations in Variable section and define force in X and Y direction. I can define w, t stated in equation.
But I am not sure how (mathematically correct) to write full equation in Comsol ? Also, How E and nabla.T are defined ? nabla.sigma ? nabla.e ?
Someone can provide me with any ACET simulation files (not AC electroosmosis) with any design that include ACET body force added so I can see what I am missing ?
Hopefully someone with prior experience with ACET can enlighten me. Thanks in advance.
Here for more information https://www.comsol.com/paper/fast-biofluid-transport-of-high-conductive-liquids-using-ac-electrothermal-pheno-19635
Hello Ms Dr
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