Flow Past a Backward-Facing Step: Comparison of PANS, DES and URANS Results with Experiments

Frendi, Abdelkader; Tosh, Abhijit; Girimaji, Sharath S.

doi:10.1080/15502280601006207

Cited by 50 publications

(14 citation statements)

References 19 publications

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“…An increase of the f ε ratio led to a prediction of a wider range of scales. A similar result was found by Frendi et al [16] at the flow past a backward-facing step. In that case a decrease in f ε improved match with experimental data.…”

supporting

confidence: 89%

Partially-Averaged Navier-Stokes Simulation of the Flow Around Circular Cylinder at Re=3900: Comparison of Low and High Reynolds Number Approaches

Korinek¹,

Tisovský²,

Hujer³

et al. 2020

Topical Problems of Fluid Mechanics 2020

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An appropriate choice of physical resolution for the Scale-Resolved Simulations (SRS) method is crucial for the accurate prediction of flow dynamics. The present study deals with numerical simulations of the flow past a circular cylinder using the Partially-Averaged Navier-Stokes bridging method. A subcritical Reynolds number 3900 is investigated at various physical resolution (the ratio of unresolved to total resolved turbulent kinetic energy f k) involving two approaches to estimate the ratio of unresolved to total resolved eddy dissipation rate fε, in particular a low Reynolds number fε = f k and a high Reynolds number fε = 1 approaches. Good agreement with experimental and DNS results was achieved for a higher physical resolution f k ≤ 0.5, fε = 1. The low Re approach led to the earlier transition of the separated boundary layer which resulted in a short recirculation region. Additionally, predicted results from simulations with the low Re approach were not influenced by a refinement of the computational grid.

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supporting

confidence: 89%

Partially-Averaged Navier-Stokes Simulation of the Flow Around Circular Cylinder at Re=3900: Comparison of Low and High Reynolds Number Approaches

Korinek¹,

Tisovský²,

Hujer³

et al. 2020

Topical Problems of Fluid Mechanics 2020

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“…Basu et al (2007) employed the PANS model to a cavity flow with varying values of f k as a function of local grid spacing and turbulent length scale. Frendi et al (2007) compared three modelling approaches (DES, URANS and PANS) and showed that the PANS model gives promising predictions for a turbulent flow over a backward facing step. In simulations of the flow past a square cylinder, Song and Park (2009) investigated the determination of parameter f k and proposed an equation to evaluate this parameter.…”

Section: Introductionmentioning

confidence: 99%

“…It was demonstrated that, for separated turbulent flows, the PANS approach is able to yield accurate predictions on a relatively coarse grid. The influence of the PANS parameter f ε was also investigated, and it was shown that the range of resolved scales decreases with decreasing f ε (Frendi et al, 2007). Basara et al (2009) combined the ζ − f model with the PANS model and applied it to the flow around the Ahmed body.…”

Section: Introductionmentioning

confidence: 99%

A low Reynolds number variant of partially-averaged Navier–Stokes model for turbulence

Peng

Davidson

et al. 2011

International Journal of Heat and Fluid Flow

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A low Reynolds number (LRN) formulation based on the Partially Averaged Navier-Stokes (PANS) modelling method is presented, which incorporates improved asymptotic representation in near-wall turbulence modelling. The effect of near-wall viscous damping can thus be better accounted for in simulations of wall-bounded turbulent flows. The proposed LRN PANS model uses an LRN k −ε model as the base model and introduces directly its model functions into the PANS formulation. As a result, the inappropriate wall-limiting

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“…PANS has proven itself in a number of applications, e.g. (Frendi et al, 2007, Krajnovic et al, 2012, Pereira, 2018, however primarily for bluff body flows where turbulence develops in shear layers. More recently, studies have been extended to boundary layer flows by Razi (2017), where the properties for using PANS for a channel flow were investigated.…”

Section: Introductionmentioning

confidence: 99%

Using a PANS Simulation Approach for the Transient Flow Around the Japan Bulk Carrier

Bensow

Boogaard

2019

Journal of Ship Research

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In this study, a PANS, Partially averaged Navier-Stokes, modelling approach developed based on the k − ω turbulence model has been applied to the flow around the Japan Bulk Carrier. Three different meshes has been employed for a fixed physical resolution for the PANS modelling. The results are encouraging, with small scale flow dynamics being allowed to develop on reasonably small mesh sizes, but more studies are required before reliable predictive simulations can be performed.

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Flow Past a Backward-Facing Step: Comparison of PANS, DES and URANS Results with Experiments

Cited by 50 publications

References 19 publications

Partially-Averaged Navier-Stokes Simulation of the Flow Around Circular Cylinder at Re=3900: Comparison of Low and High Reynolds Number Approaches

Partially-Averaged Navier-Stokes Simulation of the Flow Around Circular Cylinder at Re=3900: Comparison of Low and High Reynolds Number Approaches

A low Reynolds number variant of partially-averaged Navier–Stokes model for turbulence

Using a PANS Simulation Approach for the Transient Flow Around the Japan Bulk Carrier

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