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Flows of Materials with Yield

 

作者: Tasos C. Papanastasiou,  

 

期刊: Journal of Rheology  (AIP Available online 1987)
卷期: Volume 31, issue 5  

页码: 385-404

 

ISSN:0148-6055

 

年代: 1987

 

DOI:10.1122/1.549926

 

出版商: The Society of Rheology

 

数据来源: AIP

 

摘要:

Steady, two‐dimensional flows of Bingham fluids are analyzed by means of a modified constitutive relation that applies everywhere in the flow field, in both yielded and practically unyielded regions. The conservation equations and the constitutive relation are solved simultaneously by Galerkin finite element and Newton iteration. This combination eliminates the necessity for tracking yield surfaces in the flow field. The analysis is applied to a one‐dimensional channel flow, a two‐dimensional boundary layer flow, and a two‐dimensional extrusion flow. The finite element predictions compare well with available analytic solutions for limiting cases.

 

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