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Electroosmotic micromixer
Posted 22 ott 2014, 16:54 GMT-4 Microfluidics 1 Reply
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Hi,
in contrast to what is explained in the tutorial model (www.comsol.com/model/electroosmotic-micromixer-485) of an Electroosmotic micromixer, the electrodes on the mixer wall are not at all alternating with time, they are fixed DC voltages with alternating polarity, i.e two opposite electrodes are at same potential during the entire time of the simulation.
And if we observe the tutorial, while setting up "Wall 1" we specify E vectors whose x and y components are sinusoidal. (the step where we define boundary cond as electroosmotic velocity)
Can someone explain me how this model really works, its completely different from what i perceived. After going through the tutorial i thought that, we are applying AC potential to four electrodes and this will result in chaotic mixing of incoming fluids, but i just figured out its wrong and this is not how the model is setup. The model works fine but i need someone to help me interpret it the right way.
in contrast to what is explained in the tutorial model (www.comsol.com/model/electroosmotic-micromixer-485) of an Electroosmotic micromixer, the electrodes on the mixer wall are not at all alternating with time, they are fixed DC voltages with alternating polarity, i.e two opposite electrodes are at same potential during the entire time of the simulation.
And if we observe the tutorial, while setting up "Wall 1" we specify E vectors whose x and y components are sinusoidal. (the step where we define boundary cond as electroosmotic velocity)
Can someone explain me how this model really works, its completely different from what i perceived. After going through the tutorial i thought that, we are applying AC potential to four electrodes and this will result in chaotic mixing of incoming fluids, but i just figured out its wrong and this is not how the model is setup. The model works fine but i need someone to help me interpret it the right way.
1 Reply Last Post 23 ott 2014, 14:05 GMT-4
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Posted:
10 years ago
If we observe the model description, it states that the electrodes apply AC voltages (refer attached pic).
But, in the model there are two electrodes fixed at +V0 and remaining electrodes fixed at -V0 volt, they never alternate.
Also modeling an electrode as AC voltage source is not straight forward, we may need to include cir module to define these electrodes as AC voltage sources.
But, in the model there are two electrodes fixed at +V0 and remaining electrodes fixed at -V0 volt, they never alternate.
Also modeling an electrode as AC voltage source is not straight forward, we may need to include cir module to define these electrodes as AC voltage sources.
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