A fluid–structure interaction solver for the study on a passively deformed fish fin with non-uniformly distributed stiffness

Xiao, Qing; Shi, Guangyu; Wen, Li; Chen, Daoyi; Pan, Guang

doi:10.1016/j.jfluidstructs.2019.102778

Cited by 34 publications

(26 citation statements)

References 69 publications

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“…This provides insights into the structural design and material selection. Using a fully coupled FSI numerical solver consisting of a finite-volume-method-based fluid solver and finite-element-method based structural solver [28], a preliminary analysis was performed on the motion control of the simplified system [29]. The caudal fin was simplified as a 2D cross-section in rotation locomotion.…”

Section: Tailmentioning

confidence: 99%

Development of Modular Bio-Inspired Autonomous Underwater Vehicle for Close Subsea Asset Inspection

et al. 2021

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To reduce human risk and maintenance costs, Autonomous Underwater Vehicles (AUVs) are involved in subsea inspections and measurements for a wide range of marine industries such as offshore wind farms and other underwater infrastructure. Most of these inspections may require levels of manoeuvrability similar to what can be achieved by tethered vehicles, called Remotely Operated Vehicles (ROVs). To extend AUV intervention time and perform closer inspection in constrained spaces, AUVs need to be more efficient and flexible by being able to undulate around physical constraints. A biomimetic fish-like AUV known as RoboFish has been designed to mimic propulsion techniques observed in nature to provide high thrust efficiency and agility to navigate its way autonomously around complex underwater structures. Building upon advances in acoustic communications, computer vision, electronics and autonomy technologies, RoboFish aims to provide a solution to such critical inspections. This paper introduces the first RoboFish prototype that comprises cost-effective 3D printed modules joined together with innovative magnetic coupling joints and a modular software framework. Initial testing shows that the preliminary working prototype is functional in terms of water-tightness, propulsion, body control and communication using acoustics, with visual localisation and mapping capability.

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Section: Tailmentioning

confidence: 99%

Development of Modular Bio-Inspired Autonomous Underwater Vehicle for Close Subsea Asset Inspection

et al. 2021

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“…The communication between the fluid and structural solver is established via TCP/IP sockets, and the data mapping is achieved by the radial basis functions (RBF) based interpolation [30]. The details of the framework of the present FSI solver are described in [31].…”

Section: Omae-19-1133 Xiaomentioning

confidence: 99%

“…4. The computational domain layout (a) adopted from [31], and the generated medium mesh around the cantilever after the deformation when the tip displacement reaches the maximum (b). The generated mesh after deformation when the tip displacement reaches its maximum is depicted in Fig.…”

Section: Flow Over a Flexible Cantilever Behind A Square Cylindermentioning

confidence: 99%

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A Fluid–Structure Interaction Study on a Bionic Fish Fin With Non-Uniform Stiffness Distribution

Xiao

Shi

2020

Journal of Offshore Mechanics and Arctic Engineering

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In this paper, the propulsive performance of a caudal peduncle-fin swimmer mimicking a bio-inspired robotic fish model is numerically studied using a fully coupled FSI solver. The model consists of a rigid peduncle and a flexible fin which pitches in a uniform flow. The flexible fin is modeled as a thin plate assigned with non-uniformly distributed stiffness. A finite volume method based in-house Navier–Stokes solver is used to solve the fluid equations, while the fin deformation is resolved using a finite element code. The effect of the fin flexibility on the propulsive performance is investigated. The numerical results indicate that compliance has a significant influence on performance. Under the parameters studied in this paper, the medium flexible fin exhibits remarkable efficiency improvement, as well as thrust augment, while the least flexible fin shows no obvious difference from the rigid one. However, for the most flexible fin, although the thrust production decreases sharply, the efficiency reaches the maximum value. It should be noted that by non-uniformly distributing the rigidity across the caudal fin, our model is able to replicate some fin deformation patterns observed in both the live fish and the experimental robotic fish.

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“…Radial basis function-based (RBF) interpolation is used to map the exchanged data between the two solvers. The details of the coupling framework and its validations are given in [9].…”

Section: A Governing Equations and Numerical Approachmentioning

confidence: 99%

CFD-FSI Analysis on Motion Control of Bio-Inspired Underwater AUV System Utilizing PID Control

Wright

Xiao

Post

et al. 2020

2020 IEEE/OES Autonomous Underwater Vehicles Symposium (AUV)(50043)

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A fluid–structure interaction solver for the study on a passively deformed fish fin with non-uniformly distributed stiffness

Cited by 34 publications

References 69 publications

Development of Modular Bio-Inspired Autonomous Underwater Vehicle for Close Subsea Asset Inspection

Development of Modular Bio-Inspired Autonomous Underwater Vehicle for Close Subsea Asset Inspection

A Fluid–Structure Interaction Study on a Bionic Fish Fin With Non-Uniform Stiffness Distribution

CFD-FSI Analysis on Motion Control of Bio-Inspired Underwater AUV System Utilizing PID Control

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