Wind Tunnel Experiments of Large Scale turbulence generated on Roughness Surface

2002 ◽  
Vol 2002.3 (0) ◽  
pp. 69-70
Author(s):  
Nobumasa SEKISHITA ◽  
Hideharu MAKITA ◽  
Shirohisa KOBAYASHI
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Wind Tunnel Experiments ◽  
Roughness Surface ◽  
Scale Turbulence

scholarly journals Drag kings: characterizing large-scale flows in cycling aerodynamics

2014 ◽  
Vol 748 ◽  
pp. 1-4 ◽  
Author(s):  
A. E. Hosoi
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Primary Source ◽  
Vortex Wake ◽  
Wind Tunnel Experiments ◽  
Vortical Structures ◽  
Drag Kings ◽  
Full Rotation

AbstractIn their recent publication Crouch et al. (J. Fluid Mech., this issue, vol. 748, 2014, pp. 5–35) use wind tunnel experiments to quantify the large-scale vortical structures that develop as a cyclist progresses through a full rotation of the pedals. The authors identify asymmetries in the trailing vortex wake, which intensify as one leg straightens, as the primary source of drag variation over one pedal cycle. These new data suggest that targeted approaches to mitigate asymmetries in the trailing wake present an intriguing opportunity to reduce drag in cycling strategies and technologies.

Wind Stress on Water Surfaces

1956 ◽  
Vol 37 (5) ◽  
pp. 211-217 ◽  
Author(s):  
Gerhard Neumann
Keyword(s):  
Wind Tunnel ◽  
Wind Stress ◽  
Large Scale ◽  
Small Scale ◽  
Wind Tunnel Experiments ◽  
Large Lakes ◽  
Flow Models ◽  
Open Sea ◽  
Scale Models ◽  
Bodies Of Water

Various attempts to estimate the total wind stress at the sea surface are briefly reviewed, and the difficulties in the application of the methods used in the past are discussed. The results obtained under natural conditions, that is over larger bodies of water, such as the open sea or large lakes, agree fairly well with each other, whereas great discrepancies are observed with wind tunnel experiments. It is conceivable that the stress values obtained from wind tunnel experiments only hold for the special conditions encountered with small scale flow models. The most important hydrodynamical differences in the flow at both sides of the air-sea interfaces between small scale models and large scale natural bodies of water are pointed out.

scholarly journals On the use of helium-filled soap bubbles for large-scale tomographic PIV in wind tunnel experiments

2015 ◽  
Vol 56 (2) ◽  
Author(s):  
Fulvio Scarano ◽  
Sina Ghaemi ◽  
Giuseppe Carlo Alp Caridi ◽  
Johannes Bosbach ◽  
Uwe Dierksheide ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Wind Tunnel Experiments ◽  
Tomographic Piv ◽  
Soap Bubbles
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