Numerical simulation of flow past a tapered cylinder. by D. C. Jespersen

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ContributionsAmerican Institute of Aeronautics and Aeronautics.
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Numerical simulation of flow past a tapered cylinder. book spanwise coupling of cellular structures in 2-d and tapered circular cylinder wake under acoustic excitation Journal of Sound and Vibration, Vol.No.

1 Numerical Study of Vortex Shedding From a Circular Cylinder in Linear Shear Flow. Numerical simulation of flow past a tapered cylinder. Three-dimensional numerical simulations of linearly sheared flow past a circular cylinder have been performed for a shear parameter β of and a mean Reynolds number of 1.

Ahmad, “ Steady-state numerical solution of the Navier–Stokes and energy equations around a horizontal cylinder at moderate Reynolds numbers from to ,” Heat Transfer Eng. 17, 31 (). Google Scholar Crossref; 2. Braza, P. Chassaing, and H. Minh, “ Numerical study and physical analysis of the pressure and velocity fields in the near wake of a circular cylinder Cited by: Numerical Simulation of Flow Past a Tapered Cylinder.

By Creon Levit and Numerical simulation of flow past a tapered cylinder. book Jespersen. Abstract. We have computed the unsteady three-dimensional low Reynolds number flow past a tapered cylinder.

The spanwise variation in natural shedding frequency results in interesting three-dimensional flow phenomena. Our computed hot-wire and spectral Author: Creon Levit and Dennis Jespersen.

Sonawane CR, More WB. High order accurate numerical simulation of flow past an oscillating circular cylinder. Fluid Mech Res Int J. ;2(5)‒ DOI: /fmrij 4. Mittal S, Kumar V. Finite element study of vortex‒induced cross‒ flow and in‒line oscillations of a circular cylinder at low Reynolds numbers.

Fluid flow past twin circular cylinders in a tandem arrangement placed near a plane wall was investigated by means of numerical simulations. The two-dimensional Navier-Stokes equations were solved with a three-step finite element method at a relatively low Reynolds number of Re = for various dimensionless ratios of ≤ G/D ≤ and ≤ L/D ≤where D is the cylinder.

Three-dimensional numerical simulation of laminar flow past a tapered circular cylinder. In Parallel Computational Fluid Dynamics-Trends and Applications, pages. Numerical analysis of the flow around a circular cylinder using RANS and LES.

International Journal of Computational Fluid Dynamics: Vol. 20, Recent Advances in Simulations of CFD-based Problems, pp. A bold numerical experiment has been performed to compute the flow around a circular cylinder at super-critical Reynolds number using LES.

The simulations have been made possible by the use of a wall model that alleviates the near-wall grid resolution requirements. The equation of motion of the square cylinder is solved to simulate the vibration and the Arbitrary Lagrangian Eulerian scheme is employed to model the interaction between the vibrating cylinder and the fluid flow.

The numerical model is validated against the published results of flow past a stationary square cylinder and the results of VIV of. In the numerical simulation of the flow around a square cylinder, especially in the simulation of the Karman vortex at the end of the square cylinder, the unsteady RNG k-ε model clearly shows the.

The asymmetric steady flow experiences a Hopf bifurcation at a Reynolds number between and and becomes unsteady but maintains the planar symmetry. The transitions of the present study are compared to the transitions of flow past a square cylinder and a sphere.

The transition sequence and flow structures match closely to that of a sphere. Numerical simulations of steady flow past two cylinders in staggered arrangements - Volume - Feifei Tong, Liang Cheng, Ming Zhao. Naito, H. & Fukagata, K. Numerical simulation of flow around a circular cylinder having porous surface.

Phys. Flu This paper describes a study of the local and global effect of an isolated group of cylinders on an incident uniform flow. Using high resolution two-dimensional computations, we analysed the flow through and around a localised circular array of cylinders, where the ratio of array diameter (D G) to cylinder diameter (D) is The number of cylinders varied from N C = 7 toand they were.

the laminar flow regime by using numerical simulation. Sohankar () Flow past a quadratic cylinder at zero angle of attack performed at Reynolds number of under laminar flow. Dutta () Experimental investigation of flow past a square cylinder at an angle of 0 o and 60 o at Reynolds number 97 and Measurement have been.

This document titled ‘Direct Numerical Simulation of the Flow Past a Curved Circular Cylinder’ and the work presented in it are the Master thesis of Jos e P. Gallardo Can-abes, prepared in the Fall ofas the nal part of his Master of Science in Marine Technology degree from the Norwegian University of Science and Technology.

In this. Two-dimensional (2D) and three-dimensional (3D) hydrodynamic characteristics of flow past a square cylinder are investigated using direct numerical simulations. The variations of. The three-dimensional transition to turbulence in the wake of a tapered circular cylinder with the taper ratio has been analyzed by performing direct numerical simulation.

The Reynolds number based on the uniform inflow velocity and the diameters at the. The Reynolds number (based on the mid-span diameter) is aro The computational model has first been calibrated against experiments for uniform 3D cylinders as well as results from a Direct Numerical Simulation of turbulent wake with vortex shedding past a uniform circular cylinder, as obtained by other researchers.

FLUENT - Steady Flow Past a Cylinder; Steady Flow Past a Cylinder - Numerical Solution; Browse pages. Configure Space tools. Attachments (4) Steady Flow Past a Cylinder - Numerical Solution. Skip to end of metadata. Created by Disabled Account Alumni John Matthew Singleton Jr.

– The main objective of this work is to develop a boundary treatment in lattice Boltzmann method (LBM) for curved and moving boundaries and using this treatment to study numerically the flow around a rotating isothermal circular cylinder with/without heat transfer., – A multi‐distribution function thermal LBM model is used to simulate the flow and heat transfer around a rotating circular.

Huy Cong Vu, Jungkyu Ahn and Jin Hwan Hwang, Numerical simulation of flow past two circular cylinders in tandem and side-by-side arrangement at low Reynolds numbers, KSCE Journal of Civil Engineering, /sy, 20, 4, (), ().

FLUENT - Unsteady Flow Past a Cylinder; Unsteady Flow Past a Cylinder - Numerical Solution; Browse pages. Configure Space tools. Attachments (14) Unsteady Flow Past a Cylinder - Numerical Solution. Skip to end of metadata. Created by. A three-dimensional numerical simulation of linearly sheared flow past a circular cylinder has been performed for a shear parameter β of and a mean Reynolds number of A cylinder of 24 diameters span is considered.

A second-order accurate finite volume scheme is used to integrate the unsteady Navier-Stokes equations. We have applied theseto the well-known case of an unsteady 3D flow past a tapered cylinder. First, 2D vortices are detected in a number of horizontal slices for each time step, by means of the.

Increasing the prediction accuracy and computational efficiency of turbulence models at high Reynolds number remains a challenging problem in Computational Fluid Dynamics (CFD).

In this paper, several turbulence models are applied for numerical simulation of flow past a circular and a square cylinder at high Reynolds number. Wray-Agarwal (WA) turbulence model is a recently developed one. A study of the behavior of a square cylinder subjected to an upstream uniform air flow is presented.

The present investigation uses commercial CFD software FLUENT to simulate time-resolved flow field using constitutive relationships suitable for laminar flows.

Variation of flow induced lift force coefficient is used to estimate shedding frequency and resultant mean structural vibration. Numerical simulations of two‐dimensional laminar flow past a triangular cylinder placed in free‐stream at low Reynolds number (10⩽Re⩽) are performed.

A finite volume method, second‐order accurate in space and time, employing non‐staggered arrangement of the variables with momentum interpolation for the pressure–velocity. To study free motions, a novel force-feedback control system has been developed, consisting of: (a) a force transducer, which measures forces on a section of a cylinder moving forward at constant speed; (b) a computer using the measured force signal to drive in real time a numerical simulation of an equivalent mass-dashpot-spring system; (c) a.

The numerical simulation method was used to investigate the flow past a single cylinder. The flow field structure and the characteristic parameters of the cylindrical surface were analyzed by large eddy simulation.

The numerical results show that the calculation of the length of the recirculation zone for computation of the mean velocity in the cylinder. Numerical simulations have been performed for three-dimensional flow past a square cylinder. The cylinders are placed normal to the incoming uniform flow.

The results are based on higher order spatial and temporal discretization. The computations are carried out for a range of Reynolds number (). Vortex-induced vibration (VIV) of an elastically mounted rigid circular cylinder in an oscillatory flow is investigated by three-dimensional direct numerical simulations (DNS).

The cylinder is allowed to vibrate only in the cross-flow direction. The vortex shedding past a circular cylinder in a two- dimensional channel of varying height is presented in the term of Strouhal number by solving continuity and momentum equations using FLUENT The computational grid structure is generated by using Gambit.

In this analysis, the result is carried out with blockage ratio b=80, and Reynolds number range from 50 to Jespersen, D. & Levit, C, Numerical simulation of flow past a tapered cylinder. AIAA 29th Aerospace, Sciences Meeting, Reno, AIAA Paper 91 – Lewis, C. G, & Gharib, M.

An exploration of the wake three dimensionalities caused by a local discontinuity in cylinder diameter. Grandhi Naga Veerendra (B4AP): Numerical Simulation of compressible two phase flow with phase change. Vikas Kushwaha ( B4A), 2nd Sem Mathematical Modelling of Blood Flow in a Tapered Artery with Mild Stenosis under the influence of Transverse Magnetic Field.

[2] Chakraborty, J., Verma, N. and Chhabra, R. P.,Wall effects in the flow past a circular cylinder in a plane channel: a numerical study, Chem. Engng. Processing, [3] Coutanceau, M. and Bouard, R.,Experimental determination of the main features of the viscous flow in the wake of a circular cylinder in uniform.

Numerical investigations of the compressible turbulent flow past wavy-axis cylinder 24 July | Fluid Dynamics Research, Vol. 51, No. 5 A penalization method for the simulation of weakly compressible reacting gas-particle flows with general boundary conditions. Simulation of the Flow Past an Elliptic Cylinder,In the present work, ANSYS-Fluent software is used to perform large eddy simulations to study the three dimensional flow past an elliptic cross section cylinder with different axis ratios and Reynolds numbers.

The data on the drag and lift coefficients, Strouhal number and pressure coefficient on the cylinder surface are. Yuan Ma, M.M. Rashidi, Zhi-gang Yang, Numerical Simulation of Flow past a Square Cylinder with a Circular Bar Upstream and a Splitter Plate Downstream, Journal of.

flow past a stationary triangular cylinder in the past decade. De and Dalal () performed a numerical study of laminar flow over a triangular cylinder with varying low Reynolds numbers.

A large-eddy simulation (LES) for flow over a triangular cylinder was reported by Camarri et al. (). Iungo and Buresti () investigated the effects of.Yosuke Anzai, Koji Fukagata, Philippe Meliga, Edouard Boujo and François Gallaire, Numerical simulation and sensitivity analysis of a low-Reynolds-number flow around a square cylinder controlled using plasma actuators, Physical Review Fluids, /PhysRevFluids, 2, 4, ().The problem of exhaust flow from a high speed two-cycle engine is investigated for a specific exhaust pipe geometry.

The attempt is to simulate accurately the ramming and scavenging effects of the pressure waves at the exhaust port in the cylinder of such an engine, over a range of engine speeds.

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