Viscoelastic flow in a two-dimensional collapsible channel |
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| Authors: | Debadi Chakraborty Mohit Bajaj Leslie Yeo James Friend Matteo Pasquali J Ravi Prakash |
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| Institution: | 1. Department of Mechanics, Huazhong University of Science and Technology (HUST), 430074, Wuhan, China;2. Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, Luoyu Road 1037, Wuhan, 430074, China;3. Department of Mechanics and aerospace, Southern University of Science and Technology, 518055, Shenzhen, China;4. Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117575 Singapore;5. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology (HUST), 430074, Wuhan, China |
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| Abstract: | We compute the flow of three viscoelastic fluids (Oldroyd-B, FENE-P, and Owens blood model) in a two-dimensional channel partly bounded by a tensioned membrane, a benchmark geometry for fluid–structure interactions. The predicted flow patterns are compared to those of a Newtonian liquid. We find that computations fail beyond a limiting Weissenberg number. Flow fields and membrane shape differ significantly because of the different degree of shear thinning and molecular extensibility underlying the three different microstructural models. |
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