Peristaltic pumping of a Herschel–Bulkley fluid in a channel

摘要

Peristaltic transport of Herschel–Bulkley fluid in a channel is investigated. The effects of yield stress and wave amplitude on the pumping characteristics are obtained and discussed. It is observed that for Herschel–Bulkley fluid, the peristaltic wave passing over the channel wall pumps more fluid against pressure rise compared to a power-law fluid. Furthermore, the results for trapping phenomena are obtained and discussed for Newtonian, Bingham, power-law and Herschel–Bulkley fluids.