scholarly journals An Immersed Boundary Model of the Cochlea with Parametric Forcing

2015 ◽  
Vol 75 (3) ◽  
pp. 1065-1089 ◽  
Author(s):  
William Ko ◽  
John M. Stockie
Keyword(s):  
Immersed Boundary ◽  
Boundary Model ◽  
Parametric Forcing

scholarly journals An experimentally validated immersed boundary model of fluid–biofilm interaction

2010 ◽  
Vol 61 (12) ◽  
pp. 3033-3040 ◽  
Author(s):  
Garret Dan Vo ◽  
Eric Brindle ◽  
Jeffrey Heys
Keyword(s):  
Interaction Model ◽  
Elastic Solid ◽  
The Body ◽  
Immersed Boundary ◽  
Physical Interaction ◽  
Experimental Measurements ◽  
Viscoelastic Solid ◽  
Boundary Method ◽  
Microbial Infections ◽  
Boundary Model

Biofllms are colonies of microorganisms that live on wetted surfaces in a matrix consisting of polysaccharides, proteins, and nucleic acids. According to the National Institute of Health (NIH), biofilms play a role in over 80 percent of microbial infections in the body and these infections are remarkably difficult to treat with antimicrobial compounds. The objective here is to understand and predict the physical interaction between a biofilm and the surrounding fluid flow. We have developed a biofilm–fluid interaction model, based on the lmmersed Boundary Method, to simulate the interaction between the biofilm and a moving fluid. The model predictions of biofilm deformation quantitatively agree with experimental measurements for a range of biofilms using a simple immersed elastic solid to model the biofilm matrix. An immersed viscoelastic solid model is also developed and compared with experimental measurements. The results show that the viscoelastic behaviour inherent in the immersed boundary method (even when using a simple immersed elastic solid) is sufficient for some biofilms, but a slightly viscoelastic solid gives more general agreement with experimental measurements.

scholarly journals Image-based immersed boundary model of the aortic root

2017 ◽  
Vol 47 ◽  
pp. 72-84 ◽  
Author(s):  
Ali Hasan ◽  
Ebrahim M. Kolahdouz ◽  
Andinet Enquobahrie ◽  
Thomas G. Caranasos ◽  
John P. Vavalle ◽  
...  
Keyword(s):  
Aortic Root ◽  
Immersed Boundary ◽  
Boundary Model

scholarly journals Decoding the Relationships between Body Shape, Tail Beat Frequency, and Stability for Swimming Fish

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 215
Author(s):  
Alexander P. Hoover ◽  
Eric Tytell
Keyword(s):  
Driving Forces ◽  
Swimming Performance ◽  
Beat Frequency ◽  
Immersed Boundary ◽  
Fluid Forces ◽  
Fish Model ◽  
Fluid Environment ◽  
Boundary Model ◽  
The Stability ◽  
Driving Torque

As fish swim through a fluid environment, they must actively use their fins in concert to stabilize their motion and have a robust form of locomotion. However, there is little knowledge of how these forces act on the fish body. In this study, we employ a 3D immersed boundary model to decode the relationship between roll, pitch, and yaw of the fish body and the driving forces acting on flexible fish bodies. Using bluegill sunfish as our representative geometry, we first examine the role of an actuating torque on the stability of the fish model, with a torque applied at the head of the unconstrained fish body. The resulting kinematics is a product of the passive elasticity, fluid forces, and driving torque. We then examine a constrained model to understand the role that fin geometry, body elasticity, and frequency play on the range of corrective forces acting on the fish. We find non-monotonic behavior with respect to frequency, suggesting that the effective flexibility of the fins play an important role in the swimming performance.

A mass-conservative staggered immersed boundary model for solving the shallow water equations on complex geometries

2015 ◽  
Vol 81 (3) ◽  
pp. 151-177 ◽  
Author(s):  
Alberto Canestrelli ◽  
Aukje Spruyt ◽  
Bert Jagers ◽  
Rudy Slingerland ◽  
Mart Borsboom
Keyword(s):  
Shallow Water ◽  
Shallow Water Equations ◽  
Immersed Boundary ◽  
Complex Geometries ◽  
Boundary Model

scholarly journals A minimally-resolved immersed boundary model for reaction-diffusion problems

2013 ◽  
Vol 139 (21) ◽  
pp. 214112 ◽  
Author(s):  
Amneet Pal Singh Bhalla ◽  
Boyce E. Griffith ◽  
Neelesh A. Patankar ◽  
Aleksandar Donev
Keyword(s):  
Reaction Diffusion ◽  
Immersed Boundary ◽  
Boundary Model ◽  
Diffusion Problems
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