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Theses/Dissertations

Other Mechanical Engineering

2011

Surface tension

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Microfluidic Pumping With Surface Tension Force And Magnetohydrodynamic Drive, Mian Qin Aug 2011

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 ...