Thermophoresis at a charged surface: the role of hydrodynamic slipReport as inadecuate




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1 CPMOH - Centre de physique moléculaire optique et hertzienne

Abstract : By matching boundary layer hydrodynamics with slippage to the force-free flow at larger distances, we obtain the thermophoretic mobility of charged particles as a function of the Navier slip length b. A moderate value of b augments Ruckenstein-s result by a term 2b-λ where λ is the Debye length. If b exceeds the particle size a, the enhancement coefficient a-λ is independent of b but proportional to the particle size. Similar effects occur for transport driven by a salinity gradient or by an electric field.





Author: Julien Morthomas - Alois Würger -

Source: https://hal.archives-ouvertes.fr/



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