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- W4220768669 abstract "The self-propulsion of a Janus particle suspended in a dilute gas at equilibrium is investigated in the free molecular regime. The Janus particle consists of two hemispheres with different momentum accommodation factors; the particle and the surrounding gas are held at different constant temperatures. Based on the gas kinetic theory, we calculate the particle's self-propulsion and drag force. We conclude that self-propulsion occurs only under the condition that the particle is hotter/colder than the suspension gas, and the self-propulsion force is proportional to the difference of the momentum accommodation factors and directed along the symmetry axis. The drag force, instead, is corrected by a term proportional to the average of the momentum accommodation factors. Our analytical results are confirmed by numerical Monte Carlo simulations." @default.
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- W4220768669 date "2022-03-01" @default.
- W4220768669 modified "2023-09-23" @default.
- W4220768669 title "Self-propulsion of Janus particles in the free molecular regime" @default.
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- W4220768669 doi "https://doi.org/10.1063/5.0085921" @default.
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