3‐D flow analysis of non‐newtonian viscous fluids using “enriched” finite elements
- 1 November 1990
- journal article
- research article
- Published by Wiley in Polymer Engineering & Science
- Vol. 30 (22) , 1420-1430
- https://doi.org/10.1002/pen.760302203
Abstract
‘Enriched’ element, Q1+Po, and ‘standard’ element, Q1Po, are compared for the simulation of 3‐dimensional flow of non‐Newtonian fluids. Several 3‐dimensional polymer flow problems are analyzed. The pressure field obtained by using Q1Po elements suffers from spurious pressure modes. For complex flows, depending upon the flow geometry and the boundary conditions used, Q1+Po elements may fall to simulate even the velocity field. Q1Po elements, which satisfy the Babuska‐Brezzi condition, give accurate velocity and pressure distributions for all the problems analyzed here.Keywords
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