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Microfluidic Pumping With Surface Tension Force And Magnetohydrodynamic Drive, Mian Qin
Publicly Accessible Penn Dissertations
Micropumping is difficult to design and control as compared to their macro-scale counterparts due to the size limitation.
The first part of this dissertation focuses on micropumping with surface tension forces. A simple, single-action, capillary pump/valve consisting of a bi-phase slug confined in a non-uniform conduit is described. At low temperatures, the slug is solid and seals the conduit. Once heated above its melting temperature, the liquid slug moves spontaneously along a predetermined path due to surface tension forces imbalance. This technique can be easily combined with other propulsion mechanisms such as pressure and magnetohydrodynamics (MHD).
The second part ...