2016/09/22 by Prakash Goswami, Goswami, Prakash, Aditya Bandopadhyay +3
Chemical Engineering · Computer Science · Engineering · Physics and Astronomy · #Advanced Mathematical Modeling in Engineering #Chaotic Dynamics (nlin.CD) #Composite Material Mechanics #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Rheology and Fluid Dynamics Studies #nlin.CD #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.1609.07026
arxiv created 2016/09/22 · openalex publication_date 2016/09/22 · arxiv updated 2016/09/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the flow of a generalized Newtonian fluid, characterized by a power-law model, through a channel consisting of a wall with a flexible membrane under longitudinal tension. It is assumed that at steady state the flow through the channel admits a constant flux unidirectional flow profile, while for the unsteady case, we employ the long wave approximation and use a set of reduced equations to describe the variation of the shape of the membrane (assumed to be massless and elastic) and the variation of the fluid-flux. By means of asymptotic expansion, multiscale analysis and full numerical solutions of the pertinent governing equations, we show that depending upon the Reynolds number and the membrane stress, the flow behaviour for a shear-thinning, shear-thickening and Newtonian fluid may be markedly different, being oscillatory for one while chaotic for the other. The results presented herein hold practical relevance for several biologically relevant processes involving transport of rheologically complex biofluids through flexible domains.