ISSN:
0271-2091
Keywords:
FEM-FDM blending technique
;
Multiply connected domain
;
Pair of circular cylinders
;
Symmetric, antisymmetric and asymmetric vortices
;
Bistable nature
;
Engineering
;
Engineering General
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Interactive vortex shedding in the multiply connected domain formed by a pair of circular cylinders is analysed by the FEM-FDM blending technique. The vorticity-streamfunction formulation is used to solve the incompressible Navier-Stokes equations at Re = 100, with the time-dependent wall streamfunctions determined from the pressure constraint condition and the far-field streamfunctions from the integral series formula developed earlier by the authors. The standard Galerkin finite element method is used in the relatively small FEM subdomain and the finite difference method based on the general co-ordinate system in the rest of the flow domain. Symmetric, antisymmetric and asymmetric wake patterns are obtained confirming the earlier experimental findings. The bistable nature of the asymmetric vortex shedding as well as the intermittent drifting from one status to the other between symmetric and antisymmetric wake patterns are reported.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/fld.1650110305
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