Numerical simulation of two-dimensional flows over a circular cylinder using the immersed boundary method

Silva, Ana Lúcia Fernandes de Lima e; Neto, Aristeu da Silveira; Damasceno, João Jorge Ribeiro

doi:10.1016/s0021-9991(03)00214-6

Cited by 324 publications

(78 citation statements)

References 20 publications

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“…However, a large number of problems in biofluid dynamics involve interactions between deformable elastic bodies and incompressible viscous fluids. These fluid-structure interaction (FSI) problems involve the complicated interplay between a viscous fluid, deformable body, and free-moving boundary, making them difficult to discern [12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: The Geometric Model Of a Caudal Finmentioning

confidence: 99%

Numerical Study on Hydrodynamic Performance of Bionic Caudal Fin

2016

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Abstract:In this work, numerical simulations are conducted to reveal the hydrodynamic mechanism of caudal fin propulsion. In the modeling of a bionic caudal fin, a universal kinematics model with three degrees of freedom is adopted and the flexible deformation in the spanwise direction is considered. Navier-Stokes equations are used to solve the unsteady fluid flow and dynamic mesh method is applied to track the locomotion. The force coefficients, torque coefficient, and flow field characteristics are extracted and analyzed. Then the thrust efficiency is calculated. In order to verify validity and feasibility of the algorithm, hydrodynamic performance of flapping foil is analyzed. The present results of flapping foil compare well with those in experimental researches. After that, the influences of amplitude of angle of attack, amplitude of heave motion, Strouhal number, and spanwise flexibility are analyzed. The results show that, the performance can be improved by adjusting the motion and flexibility parameters. The spanwise flexibility of caudal fin can increase thrust force with high propulsive efficiency.

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Section: The Geometric Model Of a Caudal Finmentioning

confidence: 99%

Numerical Study on Hydrodynamic Performance of Bionic Caudal Fin

2016

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“…Although the majority of these studies have focused on studying the cross-flow past bluff bodies such as cylinders of circular [1][2][3][4][5][6], elliptic [7][8][9][10], rectangular [11][12][13][14][15] and square cross-sections [16][17][18][19][20], there are fewer studies on the semicircular cylinder geometry [21][22][23][24]. Gode et al [25] studied numerically the momentum and heat transfer characteristics of a two-dimensional (2D), incompressible and steady flow over a semicircular cylinder and pointed out that the wake ceases to be steady somewhere in the range of 120 ≤ Re ≤ 130.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Mixed Convection from Two Isothermal Semicircular Cylinders in Tandem Arrangement

Salcedo¹,

Treviño²,

Cajas³

et al. 2017

Heat Exchangers - Design, Experiment and Simulation

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In this chapter, two-dimensional mixed convection heat transfer in a laminar cross-flow from two heated isothermal semicircular cylinders in tandem arrangement with their curved surfaces facing the oncoming flow and confined in a channel is studied numerically. The governing equations are solved using the control-volume method on a nonuniform orthogonal Cartesian grid. Using the immersed-boundary method for fixed Reynolds number of Re D ¼ u D D=υ ¼ 200, Prandtl number of Pr ¼ 7, blockage ratio of BR ¼ D=H ¼ 0:2 and nondimensional pitch ratio of σ ¼ L=D ¼ 3, the influence of buoyancy and the confinement effect are studied for Richardson numbers in the range −1 ≤ Ri ≤ 1. Here, u D is the average longitudinal velocity based on the diameter of the semicylinder. The variation of the mean and instantaneous nondimensional velocity, vorticity and temperature distributions with Richardson number is presented along with the nondimensional oscillation frequencies (Strouhal numbers) and phase-space portraits of flow oscillation from each semicylinder. In addition, local and averaged Nusselt numbers over the surface of the semicylinders are also obtained. The results presented herein demonstrate how the buoyancy and wall confinement affect the wake structure, vortex dynamics and heat transfer characteristics.

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“…The IBM was first proposed by Peskin [1] in 1977 to analyze the behavior of blood flow interacting with heart valves. Since then, the IBM was employed to solve various kinds of FSI problems [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

An isogeometric SGBEM for crack problems of magneto-electro-elastic materials

Tran

Nguyen

2017

Vietnam J. Mech.

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Abstract. In this paper, a combination of the Proper Generalized Decomposition (PGD) with the Immersed Boundary method (IBM) for solving fluid-filament interaction problem is proposed. In this combination, a forcing term constructed by the IBM is introduced to Navier-Stokes equations to handle the influence of the filament on the fluid flow. The PGD is applied to solve the Poission's equation to find the fluid pressure distribution for each time step. The numerical results are compared with those by previous publications to illustrate the robustness and effectiveness of the proposed method.

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Numerical simulation of two-dimensional flows over a circular cylinder using the immersed boundary method

Cited by 324 publications

References 20 publications

Numerical Study on Hydrodynamic Performance of Bionic Caudal Fin

Numerical Study on Hydrodynamic Performance of Bionic Caudal Fin

Unsteady Mixed Convection from Two Isothermal Semicircular Cylinders in Tandem Arrangement

An isogeometric SGBEM for crack problems of magneto-electro-elastic materials

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