Numerical modeling of the induced vorticity effect on the von Kàrmàn vortex street downstream of a circular cylinder

Baranov, P. A.; Исаев, С. А.; Sudakov, A. G.

doi:10.1007/bf02831428

Cited by 5 publications

(7 citation statements)

References 7 publications

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“…Note further that the values of Strouhal number obtained in the calculations using different grids at Re = 140 (Fig. 2i) fit quite adequately the calculation and experimental data on Sh(Re) [7,[20][21][22][23][24]. Figure 2c gives the results of numerical simulation of unsteady-state heat transfer under conditions of self-oscillatory low-velocity air flow (Pr = 0.72) past a heated (jumpwise, to a temperature of 373 K) circular cylinder.…”

Section: Procedural Calculationssupporting

confidence: 66%

“…It is known (see, for example, [7]) that the development of unsteady-state laminar flow past a circular cylinder from the state of abrupt beginning of motion in a medium at rest involves several stages. The first one is the initial stage, i.e., the shock interaction between the flow and cylinder and the formation of a symmetric separation zone in the near wake.…”

Section: Procedural Calculationsmentioning

confidence: 99%

“…The value of dimensionless step in terms of time Δt in fractions of the ratio of the cylinder diameter to the characteristic velocity of incident flow, which was determined previously in test calculations [6,7,10,11,13], is 0.02.…”

Section: Multiblock Computational Gridsmentioning

confidence: 99%

“…The suggested methodology [2][3][4] was further developed in the dedicated applied software package VP2/3 [5,6] based on the use of intersecting structured grids of different scales. The VP2/3 package was used [7][8][9][10][11][12][13][14][15][16] to calculate various cases of unsteady-state laminar and turbulent flow past a circular cylinder, including those with vortex cells which are built in the circuit and accommodate rotating cylindrical bodies. Also analyzed was a flow past a cylinder with a perforated casing within which a fluid is conveyed from the high-pressure zone (in the neighborhood of the stagnation point) to the low-pressure region (in the near wake).…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

et al. 2005

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Two-dimensional Navier-Stokes and energy equations are used to perform a numerical calculation of the parameters of unsteady-state flow and heat transfer under conditions of laminar transverse flow of a viscous incompressible fluid past a circular cylinder and at Re = 140. The process of formation of Karman vortex street is treated, as well as the cyclic heating of the near and far wakes behind the heated cylinder. Special attention is given to analysis of the behavior of the integral characteristics of flow and heat transfer, and the distributions of pressure, friction and heat-transfer coefficients on the cylinder surface, as well as to correlations of the parameters of flow and temperature at selected points in the vicinity of the cylinder. Evaluation is made of the effect of the factor of unsteadiness on the increment of power and heat loads in the process of flow past the cylinder.

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Section: Procedural Calculationssupporting

confidence: 66%

Section: Procedural Calculationsmentioning

confidence: 99%

Section: Multiblock Computational Gridsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

et al. 2005

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“…The configuration of the region surrounding the cylinder with an outer boundary spaced by a large distance (30 calibers or 30 cylinder diameters in the present investigation) from the center has the form of a circle; this configuration was used in the majority of earlier investigations [7,10,15,[19][20][21][22][23]. Fixed boundary conditions, u = 1, v = 0, and p = 0, are set in the input left half the region.…”

Section: Calculation Of a Laminar Flow Around A Circular Cylindermentioning

confidence: 99%

Comparative analysis of the calculation data on an unsteady flow around a circular cylinder obtained using the VP2/3 and fluent packages and the Spalart-Allmaras and Menter turbulence models

Исаев¹,

Baranov²,

Kudryavtsev³

et al. 2005

J Eng Phys Thermophys

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An unsteady flow around a transversal circular cylinder has been analyzed on the basis of solution of Navier-Stokes and Reynolds equations, closed, in the latter case, using one-and two-parameter differential models of turbulence, by the implicit factorized method with the use of different-density structured and nonstructured grids. Solvers of specialized multiblock and universal packages have been tested.Introduction. Modern computational technologies for solving various thermophysical and aerohydrodynamical problems are characterized by the following factors: a) packages are used at the industrial stage of numerical simulation, b) calculations are paralleled with the use of multiprocessors, which is considered as the most economical way of increasing the computational efficiency, and c) different-scale problems are represented on multiblock grids, which is considered as the most rational method of solving such problems [1]. In the present numerical investigation, we considered the genesis of multiblock computational technologies [2] based on solution of Navier-Stokes and Reynolds equations by the factorized implicit method on a set of intersecting different-scale grids, including sliding ones, used for solving the classical problems on unsteady laminar and turbulent flows around a circular cylinder. Prominence was given to the comparative analysis of the specialized package VP2/3, developed on the basis of multiblock computational technologies, with the known universal package FLUENT [3]. Estimation of the acceptability of two semiempirical models of turbulence -the one parameter Spalart-Allmaras model of eddy viscosity (SA) [4] and the two-parameter Menter zonal model of shear-stress transfer (MSST) [5] -has also been the subject of the present investigation.As is known, the progress made in computational hydrodynamics in the last few decades is comparable to the progress made in the classical sciences over several centuries. These advances resulted from the rapid development of computational engineering; mathematical models of turbulence, combustion, radiative heat exchange, and others; and efficient numerical methods. Comparatively recently (in the lifetime of one generation -in the late 1960s-early 1970s), application programs written in one of the algorithmic programming languages (ALGOL or FORTRAN most often) served as the information basis of calculations. These programs were activated in large (BESM6 or CDC7600) computers in centers of collective use, and the results obtained were processed practically by hand.Today, at the industrial stage of development of computational hydrodynamics [6], application programs comprise universal and specialized packages representing complex multicomponent intelligence systems written, as a rule, in object-oriented programming languages and having a "triad" structure: grid generator-solver-graphic data interpreter. A package involves catalogs of mathematical models and data of controlling physical processes, from elements of which a desired problem is formed. Packages a...

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Baranov¹,

Исаев²,

Prigorodov³

et al. 2003

Fluid Dynamics

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Numerical modeling of the induced vorticity effect on the von Kàrmàn vortex street downstream of a circular cylinder

Cited by 5 publications

References 7 publications

Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

Comparative analysis of the calculation data on an unsteady flow around a circular cylinder obtained using the VP2/3 and fluent packages and the Spalart-Allmaras and Menter turbulence models

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