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Scheme of the experimental setup for the observation of microwave induced flows. Fluid flow is generated on top of two coplanar microelectrodes. The device is connected to a microwave generator through a transmission line.
(a) Velocity measured at a given point (, ) as a function of frequency for two water solutions (incident microwave power is 0.16 W). (b) Estimated voltages at electrodes as functions of frequency for generation of the observed fluid velocities by buoyancy and expected voltage at the electrodes from the circuit analysis [, , and ] and are computed with COMSOLMULTIPHYSICS for the actual device. is estimated from analytical solution of the induction per unit length for two infinitely long strips.
Velocity as a function of estimated dissipated power in the device for different frequencies and water solutions: (a) channel with height equal to and (b) to . Continuous lines: computed velocity as a function of dissipated power for .
Particle paths and computed velocities at a plane high from electrode level. Channel with heights of (up) and with (down).
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