263 Stability Analysis for Shear Flow by Domain Decomposition type Boundary Element Method

2001 ◽  
Vol 2001.14 (0) ◽  
pp. 249-250
Author(s):  
Takashi MANABE ◽  
Nobuyoshi TOSAKA
2008 ◽  
Vol 598 ◽  
pp. 267-292 ◽  
Author(s):  
MARC S. INGBER ◽  
SHIHAI FENG ◽  
ALAN L. GRAHAM ◽  
HOWARD BRENNER

The phenomena of self-diffusion and migration of rough spheres in nonlinear shear flows are investigated using a new traction-corrected boundary element method (TC-BEM) in which the near-field asymptotics for the traction solution in the interstitial region between two nearly touching spheres is seamlessly coupled with a traditional direct boundary element method. The TC-BEM is extremely accurate in predicting particle trajectories, and hence can be used to calculate both the particle self-diffusivity and a newly defined migration diffusivity for dilute suspensions. The migration diffusivity is a function of a nonlinearity parameter characterizing the shear flow and arises from the net displacement of the centre of gravity of particle pairs. This net displacement of the centre of gravity of particle pairs does not occur for smooth particles, nor for rough particles in a linear shear flow. An explanation is provided for why two-particle interactions of rough spheres in a nonlinear shear flow result in particle migration.


2016 ◽  
Vol 294 ◽  
pp. 358-371 ◽  
Author(s):  
Elwin van ’t Wout ◽  
Duncan R. van der Heul ◽  
Harmen van der Ven ◽  
Cornelis Vuik

2005 ◽  
Vol 13 (02) ◽  
pp. 287-299 ◽  
Author(s):  
P. J. HARRIS ◽  
H. WANG ◽  
R. CHAKRABARTI ◽  
D. HENWOOD

This paper deals with the numerical solution of the retarded potential integral equation using a collocation type boundary element method. This method is widely used in practice but often suffers from stability problems. The purpose of the paper is to carry out a stability analysis of the numerical scheme and examine how any instability arises. This paper will then propose a method for overcoming this stability problem. A comparison with an exact solution demonstrates that the approach proposed here is effective for the case of a sphere.


Author(s):  
Toshihiro OMORI ◽  
Takuji ISHIKAWA ◽  
Dominique BARTHES-BIESEL ◽  
Yohsuke IMAI ◽  
Takami YAMAGUCHI

Author(s):  
Toshihiro OMORI ◽  
Takuji ISHIKAWA ◽  
Dominique BARTHES-BIESEL ◽  
Yohsuke IMAI ◽  
Takami YAMAGUCHI

2000 ◽  
Vol 2000.13 (0) ◽  
pp. 95-96
Author(s):  
Y. IKEDA ◽  
Junichi KATSURAGAWA ◽  
Eisuke KITA ◽  
Norio KAMIYA

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