3D Structures from Stereoscopic PIV Measurements in a Turbulent Boundary Layer

2009 ◽  
pp. 65-68
Author(s):  
David J. C. Dennis ◽  
Timothy B. Nickels
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Piv Measurements ◽  
Stereoscopic Piv ◽  
3D Structures

Stereoscopic PIV measurements of a turbulent boundary layer with a large spatial dynamic range

2008 ◽  
Vol 45 (4) ◽  
pp. 745-763 ◽  
Author(s):  
Sophie Herpin ◽  
Chong Yau Wong ◽  
Michel Stanislas ◽  
Julio Soria
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Dynamic Range ◽  
Spatial Dynamic ◽  
Piv Measurements ◽  
Stereoscopic Piv

scholarly journals Cross-plane stereo-PIV measurements in a refractive-index-matched environment of flow associated with barchan dunes immersed in a turbulent boundary layer

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Nathaniel Bristow ◽  
Gianluca Blois ◽  
James Best ◽  
Kenneth Christensen
Keyword(s):  
Boundary Layer ◽  
Refractive Index ◽  
Turbulent Boundary Layer ◽  
Coherent Structures ◽  
Fixed Bed ◽  
Flow Structures ◽  
Local Flow ◽  
Piv Measurements ◽  
Complex Interactions ◽  
Barchan Dunes

Barchan dunes are crescent-shaped bedforms that form in aeolian (i.e., wind-driven) environments (including both Earth and other planets, such as Mars) as well as subaqueous environments. Under the forcing of the aloft turbulent boundary layer, they migrate downstream at a rate inversely proportional to their size, which results in complex interactions between neighboring dunes of disparate scales. In particular, it has been observed that dunes will interact at a distance, causing changes in morphology without contacting each other, which is thought to be driven by the way dunes modify the local flow field Bristow et al. (2018); Assis and Franklin (2020). In this study, the coherent structures formed in the wakes of barchan dunes are investigated using measurements of the flow over fixed-bed (i.e., solid) barchan models, both in the wake of an isolated barchan and the interdune region between interacting barchans (Fig. 1(a)). Furthermore, the interactions between the flow structures shed by the dunes and the structures in the incoming boundary layer are analyzed.

scholarly journals PIV measurements in a turbulent boundary layer overlying a spanwise heterogeneous roughness

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Rongnan Yao ◽  
Kenneth Christensen
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Boundary Layers ◽  
Surface Condition ◽  
Cross Flow ◽  
Surface Heterogeneity ◽  
Spanwise Direction ◽  
Smooth Wall ◽  
Piv Measurements ◽  
Flow Plane

In nature and engineering applications, wall-bounded flow often encounter a heterogeneous surface condition, such as the atmosphere boundary layer at the urban boundary and flow over riveted aircraft surfaces. In a particular scenario, when the surface heterogeneity is predominantly in the spanwise direction of the flow, this roughness heterogeneity can generate secondary flow in cross flow plane which is very different from smooth-wall or homogeneous rough-wall boundary layers.

Double large field stereoscopic PIV in a high Reynolds number turbulent boundary layer

2009 ◽  
Vol 50 (1) ◽  
pp. 1-12 ◽  
Author(s):  
S. Coudert ◽  
J. M. Foucaut ◽  
J. Kostas ◽  
M. Stanislas ◽  
P. Braud ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Reynolds Number ◽  
Turbulent Boundary Layer ◽  
High Reynolds Number ◽  
Large Field ◽  
Stereoscopic Piv ◽  
High Reynolds
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