NUMERICAL-ANALYSIS OF 3-DIMENSIONAL BINGHAM PLASTIC-FLOW

被引:114
作者
BEVERLY, CR [1 ]
TANNER, RI [1 ]
机构
[1] UNIV SYDNEY,DEPT MECH ENGN,SYDNEY,NSW 2006,AUSTRALIA
关键词
BINGHAM PLASTIC; BIVISCOSITY FORMULATION; ECCENTRIC ANNULUS; 3-DIMENSIONAL FINITE ELEMENTS;
D O I
10.1016/0377-0257(92)80006-J
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The present paper considers the problem of predicting motionless regions and true plug (constant velocity areas where the stress is below the yield stress) regimes for fully three-dimensional Bingham plastic flows. Numerical solutions are obtained using a finite-element biviscosity formulation. Comparisons are drawn to alternative numerical approximations and a review of common finite elements is made with a view to finding accurate, stable and economical schemes. A number of elements are compared and we conclude that some of the Fortin elements are most useful on the grounds of computational overhead and solution accuracy. These are used to investigate axial flows of a Bingham body in an annulus. Finally, we show that the numerical solutions of the axial flow of a Bingham plastic in a narrow eccentric annulus show good agreement with observations and theoretical predictions.
引用
收藏
页码:85 / 115
页数:31
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