Velocity Profiles in Slowly Sheared Bubble Rafts

by: John Lauridsen, Gregory Chanan, Michael Dennin

Physical Review Letters, Vol. 93, No. 1. (2004)

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Abstract

Measurements of average velocity profiles in a bubble raft subjected to slow, steady shear demonstrate the coexistence between a flowing state and a jammed state similar to that observed for three-dimensional foams and emulsions [P. Coussot et al., Phys. Rev. Lett. 88, 218301 (2002)]. For sufficiently slow shear, the flow is generated by nonlinear topological rearrangements. We report on the connection between this short-time motion of the bubbles and the long-time averages. We find that velocity profiles for individual rearrangement events fluctuate, but a smooth, average velocity is reached after averaging over only a relatively few events.

@article{citeulike:2606116, abstract = {Measurements of average velocity profiles in a bubble raft subjected to slow, steady shear demonstrate the coexistence between a flowing state and a jammed state similar to that observed for three-dimensional foams and emulsions [P. Coussot et al., Phys. Rev. Lett. 88, 218301 (2002)]. For sufficiently slow shear, the flow is generated by nonlinear topological rearrangements. We report on the connection between this short-time motion of the bubbles and the long-time averages. We find that velocity profiles for individual rearrangement events fluctuate, but a smooth, average velocity is reached after averaging over only a relatively few events.}, author = {Lauridsen, John and Chanan, Gregory and Dennin, Michael }, citeulike-article-id = {2606116}, doi = {10.1103/PhysRevLett.93.018303}, journal = {Physical Review Letters}, keywords = {bubbles, shear, shearband}, number = {1}, posted-at = {2008-04-25 23:54:44}, priority = {2}, publisher = {APS}, title = {Velocity Profiles in Slowly Sheared Bubble Rafts}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000093000001018303000001\&idtype=cvips\&gifs=yes}, volume = {93}, year = {2004} }

RIS record

TY - JOUR ID - citeulike:2606116 L3 - citeulike-article-id:2606116 TI - Velocity Profiles in Slowly Sheared Bubble Rafts JF - Physical Review Letters VL - 93 IS - 1 PB - APS N2 - Measurements of average velocity profiles in a bubble raft subjected to slow, steady shear demonstrate the coexistence between a flowing state and a jammed state similar to that observed for three-dimensional foams and emulsions [P. Coussot et al., Phys. Rev. Lett. 88, 218301 (2002)]. For sufficiently slow shear, the flow is generated by nonlinear topological rearrangements. We report on the connection between this short-time motion of the bubbles and the long-time averages. We find that velocity profiles for individual rearrangement events fluctuate, but a smooth, average velocity is reached after averaging over only a relatively few events. KW - bubbles KW - shear KW - shearband AU - Lauridsen, John AU - Chanan, Gregory AU - Dennin, Michael PY - 2004/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000093000001018303000001&idtype=cvips&gifs=yes ER -

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