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Abstract: The thermal expansion of a fluid combined with a temperature-dependentviscosity introduces nonlinearities in the Navier-Stokes equations unrelated tothe convective momentum current. The couplings generate the possibility for netfluid flow at the microscale controlled by external heating. This novelthermo-mechanical effect is investigated for a thin fluid chamber by anumerical solution of the Navier-Stokes equations and analytically by aperturbation expansion. A demonstration experiment confirms the basic mechanismand quantitatively validates our theoretical analysis.



Author: Franz M. Weinert 1, Jonas A. Kraus 2, Thomas Franosch 2, Dieter Braun 1 1 Applied Physics and Center for NanoScience CeNS, Depart

Source: https://arxiv.org/







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