Hello all!!
i need to study and Model Electrothermal flows using COMSOL, where i need to enhance mixing efficiency of two dyes by applying AC voltage through electrodes in a Microfluidic channel. this would induce non-uniform permittivity and conductivity gradients thereby temperature change due to Joule heating and so creating Electrothermal flows.
Can anyone please help me out in how to add the Electrothermal force(ETF) equation in comsol it has grad(T), grad(sigma), grad(epsilon)terms? or do i need to use PDEs for adding ETF equations?
what are the Physics do i need to add to Model? I have searched Electrothermal Models in Gallery but couldn't find the appropriate one.as i am new to COMSOL all your suggestions are welcomed.
Thanks!!
For the electrothermal force driving fluid flow, the fluid motion could be calculated using the navier stokes equation in most cases. There will be a force referenced in the physics module, and you're going to have to add the PDE equation for the force manually in "subdomain equations" category, and calculating the x, y, and z, forces separately.
I'm not sure if you're trying to find the transient solution, or if with the conditions you're operating under would include convection, but this would be generally how you do it if there is no pre-built physics module.
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