Dilatant Flow of Concentrated Suspensions of Rough Particles

by: Didier Lootens, Henri van Damme, Yacine Hémar, Pascal Hébraud

Physical Review Letters, Vol. 95, No. 26. (2005)

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Abstract

The flow anisotropy of a concentrated colloidal suspension at the jamming transition is studied. It is shown that the use of rough spherical particles reduces the hydrodynamic lubrication forces between adjacent colloids and makes possible the study of the stress tensor anisotropy. At low shear rates, the suspension exerts an attractive force between two opposite surfaces, whereas at higher shear rates it becomes dilatant. Direct confocal microscopy observation of the particles organization reveal that crystallites form at high shear rate.

@article{citeulike:2184098, abstract = {The flow anisotropy of a concentrated colloidal suspension at the jamming transition is studied. It is shown that the use of rough spherical particles reduces the hydrodynamic lubrication forces between adjacent colloids and makes possible the study of the stress tensor anisotropy. At low shear rates, the suspension exerts an attractive force between two opposite surfaces, whereas at higher shear rates it becomes dilatant. Direct confocal microscopy observation of the particles organization reveal that crystallites form at high shear rate.}, author = {Lootens, Didier and van Damme, Henri and H\'emar, Yacine and H\'ebraud, Pascal }, citeulike-article-id = {2184098}, doi = {10.1103/PhysRevLett.95.268302}, journal = {Physical Review Letters}, keywords = {lubrication, qualifier}, number = {26}, posted-at = {2007-12-31 22:26:23}, priority = {3}, publisher = {APS}, title = {Dilatant Flow of Concentrated Suspensions of Rough Particles}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000095000026268302000001\&idtype=cvips\&gifs=yes}, volume = {95}, year = {2005} }

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TY - JOUR ID - citeulike:2184098 L3 - citeulike-article-id:2184098 TI - Dilatant Flow of Concentrated Suspensions of Rough Particles JF - Physical Review Letters VL - 95 IS - 26 PB - APS N2 - The flow anisotropy of a concentrated colloidal suspension at the jamming transition is studied. It is shown that the use of rough spherical particles reduces the hydrodynamic lubrication forces between adjacent colloids and makes possible the study of the stress tensor anisotropy. At low shear rates, the suspension exerts an attractive force between two opposite surfaces, whereas at higher shear rates it becomes dilatant. Direct confocal microscopy observation of the particles organization reveal that crystallites form at high shear rate. KW - lubrication KW - qualifier AU - Lootens, Didier AU - van Damme, Henri AU - H\'emar, Yacine AU - H\'ebraud, Pascal PY - 2005/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000095000026268302000001&idtype=cvips&gifs=yes ER -

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