An improved penalty immersed boundary method for fluid–flexible body interaction

2011 ◽  
Vol 230 (12) ◽  
pp. 5061-5079 ◽  
Author(s):  
Wei-Xi Huang ◽  
Cheong Bong Chang ◽  
Hyung Jin Sung
Keyword(s):  
Immersed Boundary Method ◽  
Immersed Boundary ◽  
Flexible Body ◽  
Body Interaction ◽  
Boundary Method

Constructive and destructive interaction modes between two tandem flexible flags in viscous flow

2010 ◽  
Vol 661 ◽  
pp. 511-521 ◽  
Author(s):  
SOHAE KIM ◽  
WEI-XI HUANG ◽  
HYUNG JIN SUNG
Keyword(s):  
Numerical Simulation ◽  
Viscous Flow ◽  
Drag Force ◽  
Immersed Boundary Method ◽  
Reynolds Numbers ◽  
Immersed Boundary ◽  
Flexible Body ◽  
Boundary Method

Two tandem flexible flags in viscous flow were modelled by numerical simulation using an improved version of the immersed boundary method. The flexible flapping flag and the vortices produced by an upstream flag were found to interact via either a constructive or destructive mode. These interaction modes gave rise to significant differences in the drag force acting on the downstream flapping flag in viscous flow. The constructive mode increased the drag force, while the destructive mode decreased the drag force. Drag on the downstream flexible body was investigated as a function of the streamwise and spanwise gap distances, and the bending coefficient of the flexible flags at intermediate Reynolds numbers (200 ≤ Re ≤ 400).

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