Convective heat transfer from a rotating cylinder with inline oscillation

Nobari, M.R.H.; Ghazanfarian, Jafar

doi:10.1016/j.ijthermalsci.2010.05.006

Cited by 38 publications

(13 citation statements)

References 24 publications

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“…Juarez discussed the applica tion of a methodology combining distributed Lagrange multiplierbased fictitious domain techniques, finite element approximations, and operator splitting to the numerical simulation of the motion of an elliptical body falling in a Newtonian incompressible viscous flow [14]. [16][17][18][19]). Currently, most of the numerical methods which are being used for the simulation of various problems are the traditional gridbased methods (see, for example, Refs.…”

Section: Journal Of Offshore Mechanics and Arctic Engineeringmentioning

confidence: 99%

Numerical Simulation of Water-Entry and Sedimentation of an Elliptic Cylinder Using Smoothed-Particle Hydrodynamics Method

Saghatchi

Ghazanfarian

Gorji-Bandpy

2014

Journal of Offshore Mechanics and Arctic Engineering

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This paper studies the two-dimensional water-entry and sedimentation of an elliptic cyl inder using the subparticle scale (SPS) turbulence model of a Lagrangian particle-based smoothed-particle hydrodynamics (SPH) method. The motion of the body is driven by the hydrodynamic forces and the gravity. The present study shows the ability of the SPH method for the simulation of free-surface-involving and multiphase flow problems. The full Navier-Stokes equation, along with the continuity equation, have been solved as the governing equations of the problem. The accuracy of the numerical code is verified using the case o f the water-entry and exit of a circular cylinder. The numerical simulations of the water-entry and sedimentation of the vertical and horizontal elliptic cylinder with the diameter ratio o f 0.75 are performed at the Froude numbers ofO, 2,5, and 8, and the spe cific gravities of 0.5, 0.75,1,1.5,1.75, 2, and 2.5. The effect of the governing parameters and vortex shedding behind the elliptic cylinder on the trajectory curves, velocity compo nents within the flow field, rotation angle, the velocity of ellipse, and the deformation of free-surf ace have been investigated in detail, [

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Section: Journal Of Offshore Mechanics and Arctic Engineeringmentioning

confidence: 99%

Numerical Simulation of Water-Entry and Sedimentation of an Elliptic Cylinder Using Smoothed-Particle Hydrodynamics Method

Saghatchi

Ghazanfarian

Gorji-Bandpy

2014

Journal of Offshore Mechanics and Arctic Engineering

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“…Recently, the convective heat transfer from a rotating cylinder with inline oscillation was studied by Nobari et al [9] at Re numbers of 100, 200, and 300. Different rotational speeds of the cylinder (0 -2.5) are considered at various oscillating amplitudes and frequencies with three different Pr numbers of 0.7, 6, and 20.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics of Nanofluid Flow Around a Rotating Cylinder

Khelili¹,

Abderazzak²

2018

Studia UBB Chemia

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ABSTRACT. The forced convective flow and heat transfer of nanofluids past a rotating cylinder placed in a uniform cross stream is investigated numerically. The computations are carried out at a representative Reynolds number (Re) of 200. The dimensionless cylinder rotation rate (α) is varied between 0 and 6. The range of nanoparticle volume fractions (φ) considered is 0 ≤ φ ≤ 5%. Two-dimensional and unsteady mass continuity, momentum, and energy equations have been discretized using finite volume method. SIMPLE algorithm has been applied for solving the pressure linked equations. The effect of rotation rates (α) on fluid flow and heat transfer were investigated numerically. In addition, time-averaged (lift and drag coefficients and Nusselt number) results were obtained and compared with the literature data. A good agreement was obtained for both the local and averaged values. INTRODUCTIONThe classical problem of viscous incompressible flow over a circular cylinder confined in a channel is one of the most widely studied problems in computational fluid dynamics (CFD). This type of flow problems frequently arise in various engineering fields. Because of its popularity, a plethora of numerical, theoretical and experimental results are available for this problem in the literature. . An explicit pseudo-spectral technique was adopted for resolving the fundamental equations. According to their results, when α = 3.25 more than one vortex is shed downstream. Kang [3] also has contributed significant work to this research area. Sequential numerical simulations at Re equal to 40, 60, 100 and 160 in the range of 0 ≤ α ≤ 2.5 were performed. It was observed that at 60 ≤ Re ≤ 160 the maximum value of a, which favors flow instability, varies logarithmically when plotted against Re. Zdravkovich [4], has compiled almost all the experimental, analytical and numerical simulation data on flow past cylinders,In the study of wake dynamics, bluff body rotation has always drawn considerable attention largely due to its effects on boundary layer separation and the Magnus effect. Increase in the lift magnitude more than classic Prandtl's limit due to increase in rotation rate of the circular cylinder was proposed by Glauart [5]. For the similar flow configuration, Kang and Choi [6], followed with the numerical solution of the unsteady governing equations in the primitive variables velocity and pressure for flows with Re = 60, 100 and 160 with 0 = α = 2.5. Their results showed that vortex shedding vanishes when α increases beyond a critical value which follows a logarithmic dependence on the Reynolds number (e.g., the critical dimensionless rotation rate α = 1.9 for Re = 160). Later, the work of (Mittal & Kumar, [7]) performed a comprehensive numerical investigation by fixing a moderate value of Re = 200 while considering a wide interval for the dimensionless rotation rate of 0 ≤ α ≤ 5. They used the finiteelement method to solve the unsteady incompressible Navier-Stokes equations in two-dimensions for the primitive variables velocity and ...

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“…The SPH method is employed to perform the simulation of°uid-structure interaction of°ow over a water-leaving rotating circular cylinder. 23 The numerical simulation of°ow over bodies with moving walls have been investigated for the case of circular cylinder [24][25][26] and square cylinder. 27 The e®ect of rotation on the°ow pattern, lift and drag coe±cients, and the Nusselt number have been presented.…”

Section: Introductionmentioning

confidence: 99%

Turbulent fluid-structure interaction of water-entry/exit of a rotating circular cylinder using SPH method

Ghazanfarian

Saghatchi

Gorji-Bandpy

2015

Int. J. Mod. Phys. C

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This paper studies the two-dimensional (2D) water-entry and exit of a rotating circular cylinder using the Sub-Particle Scale (SPS) turbulence model of a Lagrangian particle-based SmoothedParticle Hydrodynamics (SPH) method. The full Navier-Stokes (NS) equations along with the continuity have been solved as the governing equations of the problem. The accuracy of the numerical code is veri¯ed using the case of water-entry and exit of a nonrotating circular cylinder. The numerical simulations of water-entry and exit of the rotating circular cylinder are performed at Froude numbers of 2, 5, 8, and speci¯c gravities of 0.25, 0.5, 0.75, 1, 1.75, rotating at the dimensionless rates of 0, 0.25, 0.5, 0.75. The e®ect of governing parameters and vortex shedding behind the cylinder on the trajectory curves, velocity components in the°ow¯eld, and the deformation of free surface for both cases have been investigated in detail. It is seen that the rotation has a great e®ect on the curvature of the trajectory path and velocity components in water-entry and exit cases due to the interaction of imposed lift and drag forces with the inertia force.

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Convective heat transfer from a rotating cylinder with inline oscillation

Cited by 38 publications

References 24 publications

Numerical Simulation of Water-Entry and Sedimentation of an Elliptic Cylinder Using Smoothed-Particle Hydrodynamics Method

Numerical Simulation of Water-Entry and Sedimentation of an Elliptic Cylinder Using Smoothed-Particle Hydrodynamics Method

Heat Transfer Characteristics of Nanofluid Flow Around a Rotating Cylinder

Turbulent fluid-structure interaction of water-entry/exit of a rotating circular cylinder using SPH method

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