NUMERICAL INVESTIGATION ON NON-NEWTONIAN FLOWS THROUGH DOUBLE CONSTRICTIONS BY AN UNSTRUCTURED FINITE VOLUME METHOD

被引：10

作者：

Gao Wei ^{[1
]}

Liu Ru-xun ^{[1
]}

Duan Ya-li ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Math, Hefei 230026, Peoples R China

来源：

JOURNAL OF HYDRODYNAMICS | 2009年 / 21卷 / 05期

基金：

中国国家自然科学基金;

关键词：

double constrictions; power-law fluid; finite volume method; unstructured grids; INCOMPRESSIBLE-FLOW; TURBULENT-FLOW; PULSATILE FLOW; FLUID-FLOW; SIMULATION; ARTERIES; CHANNEL; GRIDS; TUBES; STEP;

D O I：

10.1016/S1001-6058(08)60193-6

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This article presents a numerical investigation on a steady non-Newtonian flow through a two-dimensional channel with double constrictions. The power-law mode is employed in describing the non-Newtonian behavior of the flow. An unstructured finite volume method combined with a fractional-step projection method is developed for the discretization of incompressible equations governing the non-Newtonian flows. The important flow dynamics related with the arterial diseases, such as the wall shear stress and vortex generation, are also numerically studied in detail. Numerical results reveal that there are marked differences between Newtonian and non-Newtonian models.

引用

页码：622 / 632

页数：11

共 24 条

[1] FLOW PATTERNS AND SPATIAL-DISTRIBUTION OF ATHEROSCLEROTIC LESIONS IN HUMAN CORONARY-ARTERIES [J].

ASAKURA, T ;

KARINO, T .

CIRCULATION RESEARCH, 1990, 66 (04) :1045-1066

[2] PATIENT-SPECIFIC BLOOD DYNAMIC SIMULATIONS IN ASSESSING ENDOVASCULAR OCCLUSION OF INTRACRANIAL ANEURYSMS [J].

Chen Jia-liang ;

Wang Sheng-zhang ;

Ding Guang-hong ;

Yang Xin-jian ;

Li Hai-yun .

JOURNAL OF HYDRODYNAMICS, 2009, 21 (02) :271-276

[3]

Damodaran V, 1996, INT J NUMER METH FL, V23, P1021, DOI 10.1002/(SICI)1097-0363(19961130)23:10<1021::AID-FLD449>3.0.CO

[4]

2-D

[5] Bifurcation phenomena in incompressible sudden expansion flows [J].

Drikakis, D .

PHYSICS OF FLUIDS, 1997, 9 (01) :76-87

[6] ACUTE VASCULAR ENDOTHELIAL CHANGES ASSOCIATED WITH INCREASED BLOOD VELOCITY GRADIENTS [J].

FRY, DL .

CIRCULATION RESEARCH, 1968, 22 (02) :165-&

[7] Lattice Boltzmann method for non-Newtonian (power-law) fluids [J].

Gabbanelli, S ;

Drazer, G ;

Koplik, J .

PHYSICAL REVIEW E, 2005, 72 (04)

[8] THE FINITE VOLUME PROJECTION METHOD WITH HYBRID UNSTRUCTURED TRIANGULAR COLLOCATED GRIDS FOR INCOMPRESSIBLE FLOWS [J].

Gao Wei ;

Duan Ya-li ;

Liu Ru-xun .

JOURNAL OF HYDRODYNAMICS, 2009, 21 (02) :201-211

[9] A TEST PROBLEM FOR OUTFLOW BOUNDARY-CONDITIONS - FLOW OVER A BACKWARD-FACING STEP [J].

GARTLING, DK .

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 1990, 11 (07) :953-967

[10] ON THE THEORY OF SEMIIMPLICIT PROJECTION METHODS FOR VISCOUS INCOMPRESSIBLE-FLOW AND ITS IMPLEMENTATION VIA A FINITE-ELEMENT METHOD THAT ALSO INTRODUCES A NEARLY CONSISTENT MASS MATRIX .1. THEORY [J].

GRESHO, PM .

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 1990, 11 (05) :587-620

← 1 2 3 →