Deformation and Flow of a Two-Dimensional Foam under Continuous Shear

by: G Debrégeas, H Tabuteau, J-M di Meglio

Phys. Rev. Lett., Vol. 87, No. 17. (22 October 2001), pp. 178305-1-178305-4.

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Abstract

We investigate the flow properties of a 2D foam (a confined monolayer of jammed bubbles) submitted to a continuous shear in a Couette geometry. A strong localization of the flow at the moving inner wall is evidenced. Moreover, velocity fluctuations measurements reveal self-similar dynamical structures consisting of clusters of bubbles moving coherently. A stochastic model is proposed where bubbles rearrangements are activated by local stress fluctuations produced by the shearing wheel. This model gives a complete description of our observations and is also consistent with available data on granular shear bands.

@article{DebregeasdiMeglioPRL2001, abstract = {We investigate the flow properties of a 2D foam (a confined monolayer of jammed bubbles) submitted to a continuous shear in a Couette geometry. A strong localization of the flow at the moving inner wall is evidenced. Moreover, velocity fluctuations measurements reveal self-similar dynamical structures consisting of clusters of bubbles moving coherently. A stochastic model is proposed where bubbles rearrangements are activated by local stress fluctuations produced by the shearing wheel. This model gives a complete description of our observations and is also consistent with available data on granular shear bands.}, author = {Debr{\'e}geas, G. and Tabuteau, H. and di Meglio, J-M }, citeulike-article-id = {300224}, journal = {Phys. Rev. Lett.}, keywords = {2d, foam, rheology}, month = {October}, number = {17}, pages = {178305-1--178305-4}, posted-at = {2005-08-22 05:06:14}, priority = {2}, title = {Deformation and Flow of a Two-Dimensional Foam under Continuous Shear}, volume = {87}, year = {2001} }

RIS record

TY - JOUR ID - DebregeasdiMeglioPRL2001 L3 - citeulike-article-id:300224 TI - Deformation and Flow of a Two-Dimensional Foam under Continuous Shear JF - Phys. Rev. Lett. VL - 87 IS - 17 SP - 178305-1 EP - 178305-4 N2 - We investigate the flow properties of a 2D foam (a confined monolayer of jammed bubbles) submitted to a continuous shear in a Couette geometry. A strong localization of the flow at the moving inner wall is evidenced. Moreover, velocity fluctuations measurements reveal self-similar dynamical structures consisting of clusters of bubbles moving coherently. A stochastic model is proposed where bubbles rearrangements are activated by local stress fluctuations produced by the shearing wheel. This model gives a complete description of our observations and is also consistent with available data on granular shear bands. KW - 2d KW - foam KW - rheology AU - Debr{\'e}geas, G AU - Tabuteau, H AU - di Meglio, J-M PY - 2001/10/22/ ER -

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