We consider the effect of surface roughness on solid-solid contact in a Stokes flow. Various models for the roughness are considered, and a unified methodology is given to derive the corresponding asymptotics of the drag force in the close-contact limit. In this way, we recover and clarify the various expressions that can be found in previous studies.
@article{M2AN_2012__46_5_1201_0, author = {G\'erard-Varet, David and Hillairet, Matthieu}, title = {Computation of the drag force on a sphere close to a wall}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique}, volume = {46}, year = {2012}, pages = {1201-1224}, doi = {10.1051/m2an/2012001}, mrnumber = {2916378}, zbl = {1267.76020}, language = {en}, url = {http://dml.mathdoc.fr/item/M2AN_2012__46_5_1201_0} }
Gérard-Varet, David; Hillairet, Matthieu. Computation of the drag force on a sphere close to a wall. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 46 (2012) pp. 1201-1224. doi : 10.1051/m2an/2012001. http://gdmltest.u-ga.fr/item/M2AN_2012__46_5_1201_0/
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