3-D flow analysis of non-newtonian viscous fluids using “enriched” finite elements

✍ Scribed by Mahesh Gupta; Tai H. Kwon

• Publisher: Society for Plastic Engineers
• Year: 1990
• Tongue: English
• Weight: 856 KB
• Volume: 30
• Category: Article
• ISSN: 0032-3888
• DOI: 10.1002/pen.760302203

✦ Synopsis

Abstract

‘Enriched’ element, Q~1~^+^P~o~, and ‘standard’ element, Q~1~P~o~, 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 Q~1~P~o~ elements suffers from spurious pressure modes. For complex flows, depending upon the flow geometry and the boundary conditions used, Q~1~^+^P~o~ elements may fall to simulate even the velocity field. Q~1~P~o~ elements, which satisfy the Babuska‐Brezzi condition, give accurate velocity and pressure distributions for all the problems analyzed here.