Hydrodynamic modeling and performance analysis of bio-inspired swimming

Ghommem, Mehdi; Bourantas, George C.; Wittek, Adam; Miller, Karol; Hajj, Muhammad R.

doi:10.1016/j.oceaneng.2019.106897

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…In the present study we combine the boundary condition-enforced immersed boundary (BCE-IB) method [21,22] with the incremental pressure correction scheme (IPCS) [23] using the finite element (FE) method. The main advantage of the BCE-IB method is that it satisfies accurately both the the governing equations and boundary conditions using velocity and pressure correction procedures.…”

Section: Contributions Of This Studymentioning

confidence: 99%

Immersed boundary finite element method for blood flow simulation

Bourantas

Lampropoulos

Zwick

et al. 2020

Preprint

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We present an efficient and accurate immersed boundary (IB) finite element (FE) solver for numerically solving incompressible Navier-Stokes equations. Particular emphasis is given to internal flows with complex geometries (blood flow in the vasculature system). IB methods are computationally costly for internal flows, mainly due to the large percentage of grid points that lie outside the flow domain. In this study, we apply a local refinement strategy, along with a domain reduction approach in order to reduce the grid that covers the flow domain and increase the percentage of the grid nodes that fall inside the flow domain. The proposed method utilizes an efficient and accurate FE solver with the incremental pressure correction scheme (IPCS), along with the boundary condition enforced IB method to numerically solve the transient, incompressible Navier-Stokes flow equations. We verify the accuracy of the numerical method using the analytical solution for Poiseuille flow in a cylinder. We further examine the accuracy and applicability of the proposed method by considering flow within complex geometries, such as blood flow in aneurysmal vessels and the aorta, flow configurations which would otherwise be extremely difficult to solve by most IB methods. Our method offers high accuracy, as demonstrated by the verification examples, and high efficiency, as demonstrated through the solution of blood flow within complex geometry on an off-the-shelf laptop computer.

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Section: Contributions Of This Studymentioning

confidence: 99%

Immersed boundary finite element method for blood flow simulation

Bourantas

Lampropoulos

Zwick

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…We highlighted the applicability of the proposed scheme in more computationally demanding flow cases such as the motion of two cylinders moving toward each other, and 3D flow in a rectangular duct with spherical and non‐convex (Möbius torus) obstacles. Examples of application of the proposed scheme to 2D flow problems that involve non‐convex objects can be found in Reference 65.…”

Section: Discussionmentioning

confidence: 99%

An immersed boundary vector potential‐vorticity meshless solver of the incompressible Navier–Stokes equation

Bourantas

Zwick

Lavier

et al. 2022

Numerical Methods in Fluids

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We present a strong form meshless solver for numerical solution of the nonstationary, incompressible, viscous Navier–Stokes equations in two (2D) and three dimensions (3D). We solve the flow equations in their stream function‐vorticity (in 2D) and vector potential‐vorticity (in 3D) formulation, by extending to 3D flows the boundary condition‐enforced immersed boundary method, originally introduced in the literature for 2D problems. We use a Cartesian grid, uniform or locally refined, to discretize the spatial domain. We apply an explicit time integration scheme to update the transient vorticity equations, and we solve the Poisson type equation for the stream function or vector potential field using the meshless point collocation method. Spatial derivatives of the unknown field functions are computed using the discretization‐corrected particle strength exchange method. We verify the accuracy of the proposed numerical scheme through commonly used benchmark and example problems. Excellent agreement with the data from the literature was achieved. The proposed method was shown to be very efficient, having relatively large critical time steps.

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“…In order to increase the motion stability and the control accuracy of the robotic fish in the detection and sampling process, the hydrodynamic characteristics of the fishlike swimming motion should be analyzed to provide the dynamic model for the motion control. Ghommem et al (2020) have simulated thrust forces, lateral forces, and vorticity patterns in the wake of a swimming deformable fishlike body to reveal the existence of an optimal lateral oscillation amplitude that produces positive thrust. Xue et al (2020) have studied the evolvement rule of the fluid field around the fishlike model from starting to cruising and the hydrodynamic effect to find that the superposition of vortices could benefit the swimming performance.…”

Section: Introductionmentioning

confidence: 99%

Research on the effects of complex terrain on the hydrodynamic performance of a deep-sea fishlike exploring and sampling robot moving near the sea bottom

Xue

Bai²,

Ren³

et al. 2023

Front. Mar. Sci.

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Deep-sea exploring and sampling technologies have become frontier topics. Generally, the movable exploring mode near the seabed with low disturbance is an important way to improve the measurement accuracy and expand the measurement range. Inspired by fish, the fishlike propulsion method has the characteristics of low disturbance and high flexibility, which is very suitable for near-seabed detection under complex terrain conditions. However, the swimming mechanism and surrounding flow field evolution law of the robotic fish under the constraints of complex terrain are still unclear. In this paper, the confined terrain space is constructed with an undulating seabed and a narrow channel, and the hydrodynamic changing law and flow field evolution law of the autonomous swimming process of the fishlike swimmer in the confined space are analyzed. Moreover, the influence mechanism of the terrain on the motion performance of the robotic fish is revealed, and the optimal motion mode of the robotic fish under a complex terrain constraint is discussed. The results show that the propulsion force, Froude efficiency, and swimming stability of the robotic fish vary with the distance from the bottom under the undulating seabed condition lightly. When the distance from the bottom exceeds a certain value, it can be considered that the undulating seabed no longer affects the swimmer. Furthermore, when the robotic fish swims through a narrow channel with certain width, the swimming performance obviously varies with the distance from the boundary surface. During swimming in the confined terrain space, the propulsion force and swimming stability of robotic fish will decrease. In order to maintain the forward speed, the robotic fish should improve the tail-beat frequency in real time. However, considering the swimming stability, the tail-beat frequency is not the larger the better. The relevant conclusions of this paper could provide theoretical support for the development of low-disturbance bionic exploring and sampling platforms for deep-sea resources and environments.

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Hydrodynamic modeling and performance analysis of bio-inspired swimming

Cited by 14 publications

References 34 publications

Immersed boundary finite element method for blood flow simulation

Immersed boundary finite element method for blood flow simulation

An immersed boundary vector potential‐vorticity meshless solver of the incompressible Navier–Stokes equation

Research on the effects of complex terrain on the hydrodynamic performance of a deep-sea fishlike exploring and sampling robot moving near the sea bottom

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