An immersed-shell method for modelling fluid–structure interactions

The paper presents a novel method for numerically modelling fluid–structure interactions. The method consists of solving the fluid-dynamics equations on an extended domain, where the computational mesh covers both fluid and solid structures. The fluid and solid velocities are relaxed to one another through a penalty force. The latter acts on a thin shell surrounding the solid structures. Additionally, the shell is represented on the extended domain by a non-zero shell-concentration field, which is obtained by conservatively mapping the shell mesh onto the extended mesh. The paper outlines the theory underpinning this novel method, referred to as the immersed-shell approach. It also shows how the coupling between a fluid- and a structural-dynamics solver is achieved. At this stage, results are shown for cases of fundamental interest.

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Development of a novel method for slip velocity of fluid structure interactions by employing effects of electrostatic attraction on the surface of nano-scale particles

Insights and Innovations in Structural Engineering, Mechanics and Computation ◽

10.1201/9781315641645-100 ◽

2016 ◽

pp. 606-611

Author(s):

M Mahdavi ◽

M Sharifpur ◽

J Meyer

Keyword(s):

Slip Velocity ◽

Electrostatic Attraction ◽

Fluid Structure Interactions ◽

Fluid Structure ◽

Nano Scale ◽

Novel Method

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Numerical investigation of flexible flapping wings using computational fluid dynamics/computational structural dynamics method

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410016671343 ◽

2016 ◽

Vol 232 (1) ◽

pp. 85-95 ◽

Cited By ~ 4

Author(s):

Long Liu ◽

Hongda Li ◽

Haisong Ang ◽

Tianhang Xiao

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Structural Dynamics ◽

Fluid Structure Interaction ◽

Flapping Wings ◽

Structural Dynamic ◽

Fluid Structure ◽

Structure Interaction ◽

Non Linear ◽

Computational Structural Dynamics

A fluid–structure interaction numerical simulation was performed to investigate the flow field around a flexible flapping wing using an in-house developed computational fluid dynamics/computational structural dynamics solver. The three-dimensional (3D) fluid–structure interaction of the flapping locomotion was predicted by loosely coupling preconditioned Navier–Stokes solutions and non-linear co-rotational structural solutions. The computational structural dynamic solver was specifically developed for highly flexible flapping wings by considering large geometric non-linear characteristics. The high fidelity of the developed methodology was validated by benchmark tests. Then, an analysis of flexible flapping wings was carried out with a specific focus on the unsteady aerodynamic mechanisms and effects of flexion on flexible flapping wings. Results demonstrate that the flexion will introduce different flow fields, and thus vary thrust generation and pressure distribution significantly. In the meanwhile, relationship between flapping frequency and flexion plays an important role on efficiency. Therefore, appropriate combination of frequency and flexion of flexible flapping wings provides higher efficiency. This study may give instruction for further design of flexible flapping wings.

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Comparison between computational fluid dynamics, fluid–structure interaction and computational structural dynamics predictions of flow-induced wall mechanics in an anatomically realistic cerebral aneurysm model

International Journal of Computational Fluid Dynamics ◽

10.1080/10618560903476386 ◽

2009 ◽

Vol 23 (9) ◽

pp. 649-666 ◽

Cited By ~ 15

Author(s):

Alvaro Valencia ◽

Francisco Muñoz ◽

Sebastián Araya ◽

Rodrigo Rivera ◽

Eduardo Bravo

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Cerebral Aneurysm ◽

Structural Dynamics ◽

Fluid Structure Interaction ◽

Fluid Structure ◽

Structure Interaction ◽

Computational Structural Dynamics ◽

Aneurysm Model

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Influence of Viscosity on Forcespinning™ Dynamics

Volume 4: Dynamics, Control and Uncertainty, Parts A and B ◽

10.1115/imece2012-85964 ◽

2012 ◽

Author(s):

Simon Padron ◽

Dumitru I. Caruntu ◽

Karen Lozano

Keyword(s):

Fluid Dynamics ◽

Multiple Scales ◽

Tangential Velocity ◽

Centrifugal Forces ◽

Dynamics Model ◽

Novel Method ◽

The Finite Difference Method ◽

Jet Theory ◽

High Yields ◽

Fluid Dynamics Equations

Forcespinning™ is a novel method that makes use of centrifugal forces to produce nanofibers rapidly and at high yields. A 2D computational Forcespinning™ viscous fluid dynamics model is developed, that improves on previous models. The fluid dynamics equations are solved using themethod of multiple scales along with the finite difference method, and including slender-jet theory assumptions. The effects that the Reynolds (Re) number has on the resulting fiber trajectory, radius, and tangential velocity are presented.

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