Development of confined viscoplastic flows with heterogeneous wall slip
Date
2016ISBN
978-618-82844-0-1Publisher
National Technical University of AthensSource
ECCOMAS Congress 2016 - Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering7th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS Congress 2016
Volume
1Pages
1205-1214Google Scholar check
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The steady, pressure-driven flow of a Herschel-Bulkley fluid in a channel is considered assuming that slip occurs on one wall only due to slip heterogeneities. Hence, the velocity profile is allowed to be asymmetric. The fully-developed solutions are derived and the different flow regimes are identified. The development of the flow is investigated numerically using the Papanastasiou regularization for the constitutive equation, a power-law slip equation, and finite element simulations. The combined effects of slip and the Bingham number are discussed.