首页   按字顺浏览 期刊浏览 卷期浏览 Steady flows of viscoelastic fluids in axisymmetric abrupt contraction geometry: A comp...
Steady flows of viscoelastic fluids in axisymmetric abrupt contraction geometry: A comparison of numerical results

 

作者: Barry Bernstein,   Kathleen Ann Feigl,   Elwood T. Olsen,  

 

期刊: Journal of Rheology  (AIP Available online 1994)
卷期: Volume 38, issue 1  

页码: 53-71

 

ISSN:0148-6055

 

年代: 1994

 

DOI:10.1122/1.550495

 

出版商: The Society of Rheology

 

关键词: STEADY FLOW;VISCOELASTICITY;AXIAL SYMMETRY;FINITE ELEMENT METHOD;VORTICES;NUMERICAL SOLUTION;INCOMPRESSIBLE FLOW;RELAXATION TIME;POLYETHYLENES;NON−NEWTONIAN FLOW

 

数据来源: AIP

 

摘要:

Recently two groups of researchers have reported numerical results simulating the steady flow of a KBKZ fluid in torsion free axisymmetric abrupt contraction geometry. The fluid model used in both cases was a constitutive equation chosen to match laboratory behavior of LDPE. In both cases, quadratic finite elements were used. Large corner vortices were observed in the simulations, similar to those observed in laboratory experiments. The agreement between the results in the two papers is good. We repeat the experiment, using linear finite elements. Tracking is performed via an artificial time method, and a novel ‘‘reduced velocity’’ variable is used in our finite element simulation. There is good qualitative and quantitative agreement between the results reported here and the results previously reported by others. Quantitative measures used in the comparison—vortex opening angle, Couette correction, and vortex intensity—are analyzed.

 

点击下载:  PDF (1076KB)



返 回