Large eddy simulation of the influence of high free-stream turbulence on a spatially evolving boundary layer

Péneau, Frédéric; Boisson, H. C.; Djilali, Ned

doi:10.1016/s0142-727x(00)00055-2

Cited by 18 publications

(23 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 13 shows a more pronounced flattening of the temperature profile compared to the velocity profile. This was reported in Péneau et al (2000) and is confirmed here with the finer grid simulations presented for both lower turbulent levels and higher Reynolds numbers. At higher turbulence levels we can observe in Fig.…”

Section: Resultssupporting

confidence: 90%

“…The formation of streak-like structures takes place rapidly after the leading edge for both fields. This supports the occurrence of bypass transition pointed out in Péneau et al (2000).…”

Section: The High Free-stream Turbulence Field and The Spatial Simulasupporting

confidence: 91%

“…The generation of the turbulent fields used as entrance conditions for our spatial large eddy simulation (LES) has been fully presented in Péneau et al (2000). The same method was used here, utilizing the computational mesh described in the preceding section so that a larger range of length scale is covered and a better resolution of the vortices is achieved in the region near the wall.…”

Section: The High Free-stream Turbulence Field and The Spatial Simulamentioning

confidence: 99%

See 2 more Smart Citations

Structure of a Flat Plate Boundary Layer Subjected to Free-Stream Turbulence

Péneau¹,

Boisson

Kondjoyan³

et al. 2004

International Journal of Computational Fluid Dynamics

Self Cite

View full text Add to dashboard Cite

The structure near the flat plate leading edge of an incompressible boundary layer subjected to freestream turbulence is investigated using large eddy simulation (LES) with a dynamic mixed subgridscale model. Free-stream turbulent intensities ranging from 1.5 to 10% are investigated. The evolutions of the velocity, temperature and turbulent intensity profiles inside the boundary layer and the characteristic length scales are analyzed and compared to a laminar flat plate boundary layer. The impact of the free-stream turbulence is examined for Reynolds numbers ranging from 0 (leading edge of the flat plate) to Re x ¼ 80; 000 by using two consecutive spatial LESs. Bypass transition is found to occur in the early stage of the boundary layer development for all five cases presented here. The analysis indicates that the thermal turbulent structures transfer more energy and hence generate more thermal fluctuations in their wake than the dynamic structures.

show abstract

Section: Resultssupporting

confidence: 90%

“…The formation of streak-like structures takes place rapidly after the leading edge for both fields. This supports the occurrence of bypass transition pointed out in Péneau et al (2000).…”

Section: The High Free-stream Turbulence Field and The Spatial Simulasupporting

confidence: 91%

Section: The High Free-stream Turbulence Field and The Spatial Simulamentioning

confidence: 99%

See 1 more Smart Citation

Structure of a Flat Plate Boundary Layer Subjected to Free-Stream Turbulence

Péneau¹,

Boisson

Kondjoyan³

et al. 2004

International Journal of Computational Fluid Dynamics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Other possibilities, e.g. followed by Péneau et al [15], generate the inflow FST by superimposing random Oseen vortices.…”

Section: Introductionmentioning

confidence: 99%

Simulations of heat transfer in a boundary layer subject to free-stream turbulence

Schlatter

Henningson

2010

Journal of Turbulence

View full text Add to dashboard Cite

The present study investigates the effects of ambient free-stream turbulence (FST) on the momentum and heat transfer in a spatially developing, turbulent flat-plate boundary layer via large-eddy simulations using the ADM-RT model. Due to a local turbulence intensity T u of 7% in the free stream, the skin-friction coefficient c f and Stanton number St are substantially elevated up to 25% and 32%, respectively, in the fully turbulent region (Re τ = 300). This observation is in qualitative agreement with earlier experimental studies. Moreover, the Reynolds analogy factor is found to increase with the FST intensity T u. The depression of both mean velocity and temperature profiles in the wake region due to FST is observed. In addition, the pre-multiplied spanwise spectra show that the outer peak residing in the logarithmic region in the case without FST is replaced by a new peak located near the boundary layer edge with a spanwise scale of about 3 − 4δ 95 . It is suggested that these large-scale events and their imprint throughout the boundary layer cause the elevation of both the skin friction and heat transfer on the solid surface.

show abstract

“…Such differences make it difficult to draw reliable quantitative conclusions from comparisons of these experiments. The structure of the flat plate thermal and velocity turbulent boundary layer subjected to free stream turbulence (ranging from 7% to 21%) was investigated using large eddy simulation (LES) with a dynamic mixed sub-grid scale model (Pé neau et al, 2000), but their results were not validated with experimental data. It may be seen in Fig.…”

Section: Effect Of Incident Turbulence Intensitymentioning

confidence: 99%