scholarly journals Numerical simulation of the flow around a circular cylinder at Reynolds number Re = 3900 by means of the PANS model

2021 ◽  
Vol 2119 (1) ◽  
pp. 012078
Author(s):  
A. Shebelev ◽  
A. Gavrilov ◽  
A. Dekterev ◽  
A. Sentyabov
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Circular Cylinder ◽  
Flow Around A Cylinder ◽  
Turbulence Simulation ◽  
Computational Mesh

Abstract The paper presents a study of various versions of PANS approach for turbulence simulation using a flow around a cylinder at Reynolds number Re = 3900 as an example. The considered models were implemented in the in-house CFD package. The influence of the method of determining the parameter f k on the flow behind the cylinder was studied. The first method assumed a constant value of f k. In the second method, the f k value depended on the local computational mesh scale and the shear scale.

Numerical simulation of Reynolds number effects on velocity shear flow around a circular cylinder

2010 ◽  
Vol 26 (5) ◽  
pp. 685-702 ◽  
Author(s):  
Shuyang Cao ◽  
Shigehira Ozono ◽  
Yukio Tamura ◽  
Yaojun Ge ◽  
Hironori Kikugawa
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Circular Cylinder ◽  
Shear Flow ◽  
Velocity Shear ◽  
Reynolds Number Effects

Numerical Simulation of Vortex Shedding From a Circular Cylinder in the Presence of a Free Surface

2003 ◽  
Author(s):  
S. Nagaya ◽  
R. E. Baddour
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Free Surface ◽  
Circular Cylinder ◽  
Vortex Shedding ◽  
Fluid Flows ◽  
Reynolds Numbers ◽  
Cfd Simulations ◽  
Induced Drag

CFD simulations of crossflows around a 2-D circular cylinder and the resulting vortex shedding from the cylinder are conducted in the present study. The capability of the CFD solver for vortex shedding simulation from a circular cylinder is validated in terms of the induced drag and lifting forces and associated Strouhal numbers computations. The validations are done for uniform horizontal fluid flows at various Reynolds numbers in the range 103 to 5×105. Crossflows around the circular cylinder beneath a free surface are also simulated in order to investigate the characteristics of the interaction between vortex shedding and a free surface at Reynolds number 5×105. The influence of the presence of the free surface on the vortex shedding due to the cylinder is discussed.

Numerical Simulation of Vortex Shedding Past a Circular Cylinder in a Cross-Flow at Low Reynolds Number With Finite Volume-Technique: Part 1 — Forced Oscillations

2007 ◽  
Author(s):  
Antoine Placzek ◽  
Jean-Franc¸ois Sigrist ◽  
Aziz Hamdouni
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Circular Cylinder ◽  
Finite Volume ◽  
Vortex Shedding ◽  
Stokes Equations ◽  
Cross Flow ◽  
Forced Oscillations ◽  
Lift And Drag ◽  
Wake Characteristics

The numerical simulation of the flow past a circular cylinder forced to oscillate transversely to the incident stream is presented here for a fixed Reynolds number equal to 100. The 2D Navier-Stokes equations are solved with a classical Finite Volume Method with an industrial CFD code which has been coupled with a user subroutine to obtain an explicit staggered procedure providing the cylinder displacement. A preliminary work is conducted in order to check the computation of the wake characteristics for Reynolds numbers smaller than 150. The Strouhal frequency fS, the lift and drag coefficients CL and CD are thus controlled among other parameters. The simulations are then performed with forced oscillations f0 for different frequency rations F = f0/fS in [0.50–1.50] and an amplitude A varying between 0.25 and 1.25. The wake characteristics are analysed using the time series of the fluctuating aerodynamic coefficients and their FFT. The frequency content is then linked to the shape of the phase portrait and to the vortex shedding mode. By choosing interesting couples (A,F), different vortex shedding modes have been observed, which are similar to those of the Williamson-Roshko map.

Numerical Simulation of Flow around Cylinder Using the Lattice Boltzmann Method Based on Guo Boundary Condition

2011 ◽  
Vol 474-476 ◽  
pp. 422-427
Author(s):  
Hang Li ◽  
Yong Hong Liu ◽  
Ya Zhou Wang ◽  
Jian Ming Ma
Keyword(s):  
Numerical Simulation ◽  
Boundary Condition ◽  
Reynolds Number ◽  
Kinetic Energy ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Cooling Tower ◽  
Flow Around A Cylinder ◽  
Flow Around Cylinder ◽  
Boltzmann Method

In this paper, the lattice Boltzmann Method is applied to simulate incompressible steady flow around a cylinder. The simulation model is based on D2Q9 lattice model and Guo boundary condition. Different Reynolds number and cylinder position in the flow field is considered to acquire corresponding velocity, vorticity, pressure and kinetic energy. The conclusions demonstrated in this paper could be useful for the project like construction of ocean platform, cooling tower or high chimney and so on.

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