Finite element technique to solve the elastic strain for Leonov fluid flow
作者:
Gwo‐Geng Lin,
Hsieng‐Cheng Tseng,
Yi‐Shi Ju,
期刊:
International Journal for Numerical Methods in Fluids
(WILEY Available online 1989)
卷期:
Volume 9,
issue 9
页码: 1059-1072
ISSN:0271-2091
年代: 1989
DOI:10.1002/fld.1650090902
出版商: John Wiley&Sons, Ltd
关键词: Viscoelastic flow;Leonov model;Convective integration;Finite element method
数据来源: WILEY
摘要:
AbstractThe finite element method is used to find the elastic strain (and thus the stress) for given velocity fields of the Leonov model fluid. With a simple linearization technique and the Galerkin formulation, the quasi‐linear coupled first‐order hyperbolic differential equations together with a non‐linear equality constraint are solved over the entire domain based on a weighted residual scheme. The proposed numerical scheme has yielded efficient and accurate convective integrations for both the planar channel and the diverging radial flows for the Leonov model fluid. Only the strain in the inflow plane is required to be prescribed as the boundary conditions. In application, it can be conveniently incorporated in an existing finite element algorithm to simulate the Leonov viscoelastic fluid flow with more complex geometry in which the velocity field is not knowna prioriand an iterative procedure is n
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