Experimental/Numerical Study of Turbulent Wake in Adverse Pressure Gradient

Guseva, Ekaterina; Shur, M. L.; Strelets, M. Kh.; Travin, Andrey; Breitenstein, Wiebke; Radespiel, Rolf; Scholz, Peter; Burnazzi, Marco; Knopp, Tobias

doi:10.1007/978-3-030-27607-2_33

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…At the same time, the test-case should be suitable for RANS simulations, i.e., the boundary conditions should be well-defined and without the use of active flow control, e.g., synthetic jets, to avoid flow separation on the geometry parts which generate the adverse pressure gradient. Moreover, the aim was to achieve a macroscopically statistically steady flow, which was presumably not fully met, for example, for the experiment by Driver and Mateer, see [6].…”

Section: Test Case Descriptionmentioning

confidence: 99%

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Study of RANS Turbulence Models for Turbulent Wake Flow in Adverse Pressure Gradient

Knopp¹,

Korsmeier²,

Strelets

et al. 2021

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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We present an analysis of RANS turbulence models for a new turbulent wake flow case in adverse pressure gradient. The reference data are obtained from an LES. RANS simulations using the Spalart-Allmaras model, the SST model and the SSG/LRR-ω model show a tendency to underpredict the onset of flow reversal in the wake. The comparison with the LES data reveals that the SSG/LRR-ω model underpredicts the turbulent transport of the Reynolds stresses and overpredicts the ratio of production to dissipation. Therefore two modifications of the SSG/LRR-ω model are studied, i.e., the modification of the coefficient of the gradient diffusion hypothesis for the turbulent transport of the Reynolds stresses and the sensitization of the dissipation rate to irrotational strains. Both modifications improve the agreement with the reference data.

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Section: Test Case Descriptionmentioning

confidence: 99%

“…A new test-case was designed with exactly specified boundary conditions. The test-case was studied experimentally [1] and numerically (using Large-Eddy Simulation (LES)) [6]. The comparison between experiment and LES will be described in a separate paper.…”

Section: Introductionmentioning

confidence: 99%

Study of RANS Turbulence Models for Turbulent Wake Flow in Adverse Pressure Gradient

Knopp¹,

Korsmeier²,

Strelets

et al. 2021

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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show abstract

RANS-based design of experimental flow model for investigation of complex curved turbulent wakes subjected to adverse pressure gradient

Guseva

Nikulin

Travin

et al. 2021

J. Phys.: Conf. Ser.

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Results are presented of a series of RANS computations aimed at creating a new experimental flow model of a curved turbulent wake evolving under adverse pressure gradient. In the course of the computations, key geometric parameters of the model (the angle of attack of a flat plate generating the wake and the shape and the angles of attack of liner foils creating the pressure gradient) were varied in a wide range. The purpose was to find the parameters ensuring desirable features of the flow, namely, a considerable wake curvature and its strong deceleration leading to formation of a large stagnation or even a reversal flow region, on the one hand, and no flow separation either from the flat plate or from the surfaces of the liner foils, on the other hand. As a result, the design satisfying all these demands has been found. This design will be implemented and studied in the framework of recently launched joint German-Russian project “Complex Wake Flows” which presents a continuation of an earlier similar project devoted to symmetric wakes.

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Numerical Simulation of the Evolution of a Curved Turbulent Wake Subjected to an Adverse Pressure Gradient

Stabnikov,

Strelets,

Travin

et al. 2024

Math Models Comput Simul

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Experimental/Numerical Study of Turbulent Wake in Adverse Pressure Gradient

Cited by 4 publications

References 9 publications

Study of RANS Turbulence Models for Turbulent Wake Flow in Adverse Pressure Gradient

Study of RANS Turbulence Models for Turbulent Wake Flow in Adverse Pressure Gradient

RANS-based design of experimental flow model for investigation of complex curved turbulent wakes subjected to adverse pressure gradient

Numerical Simulation of the Evolution of a Curved Turbulent Wake Subjected to an Adverse Pressure Gradient

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