The effect of sweep on the forced transitional flow over a backward-facing step

Jürgens, Werner; Kaltenbach, Hans-Jakob

doi:10.1016/j.compfluid.2012.01.022

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…El Khoury et al [28] have utilized DNS to consider backward-facing step flow at Re = 5200. Jürgens and Kaltenbach [29] have employed LES turbulence model for backwardfacing step flow of Re = 3000. LES turbulence model has also been used by Kanchi et al [30] for backward-facing step flow for varying Reynolds numbers from 5000 to 28000.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Backward-Facing Step Flow via Computational Fluid Dynamics

GÖKTEPELİ,

ATMACA

2023

Journal of Scientific Reports-A

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As a fundamental case for problems of fluid mechanics, examination of flow separation and its reattachment is important for engineering applications. Considering the significance of the subject, backward-facing step flow has been modeled via Computational Fluid Dynamics (CFD) based on an experimental study previously done at Re = 5000. Steady simulations have been conducted by k-ε Renormalization Group (RNG) considering the same flow conditions of the reference study. Pressure distributions, streamwise and cross-stream velocity components, velocity magnitude values with streamline patterns and turbulence kinetic energy values have been presented by using contour graphics. Furthermore, the stations for pressure distributions, velocity profiles for streamwise components and turbulence kinetic energy values have been defined for evolution of related data. Lower pressure zone for the wake region of the backward-facing step has been attained due to flow separation. Separation of the upstream boundary layer has been seen and it became a curved one. Moreover, turbulence level of the step wake has been obtained as higher than those of any other points. Transition to core flow has been attained at y* = 1.1 that is above the step height. Flow oscillations have been observed for x* ≥ 2 and y* ≤ 1 since the fluctuations for these values were effective in the wake region. To sum up, the dimensionless reattachment length has been numerically obtained as 5.92 which is very good agreement with the experimental results at same Reynolds number. The deviation from the reference results is from 0.34 % to 1.33 %.

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Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Backward-Facing Step Flow via Computational Fluid Dynamics

GÖKTEPELİ,

ATMACA

2023

Journal of Scientific Reports-A

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“…Also the cavity flows found in different application fields were investigated in many experimental and theoretical works. For instance, the obtained insights into the flow behavior over a backward-facing step and in cavities can be used to develop various flow control techniques [31,28,16].…”

Section: Introductionmentioning

confidence: 99%