Particle image velocimetry ( PIV ) experimental investigation of flow structures and dynamics produced by a centripetal turbine

2021 ◽  
Author(s):  
Jie Jin ◽  
Ying Fan
Keyword(s):  
Experimental Investigation ◽  
Particle Image Velocimetry ◽  
Particle Image ◽  
Flow Structures ◽  
Image Velocimetry ◽  
Centripetal Turbine

Flow Characteristics of Pressure-Driven Water in Serpentine Micro-Channels

2006 ◽  
Author(s):  
Renqiang Xiong ◽  
J. N. Chung
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Flow Characteristics ◽  
Flow Structures ◽  
Micro Channel ◽  
Pressure Drops ◽  
Micro Particle Image Velocimetry ◽  
Image Velocimetry ◽  
Micro Channels ◽  
Shape And Size

Flow structures and pressure drops were investigated in rectangular serpentine micro-channels with miter bends which had hydraulic diameters of 0.209mm, 0.395mm and 0.549mm respectively. To evaluate the bend effect, the additional pressure drop due to the miter bend must be obtained. Three groups of micro-channels were fabricated to remove the inlet and outlet losses. A validated micro-particle image velocimetry (μPIV) system was used to achieve the flow structure in a serpentine micro-channel with hydraulic diameter of 0.173mm. The experimental results show the vortices around the outer and inner walls of the bend do not form when Re<100. Those vortices appear and continue to develop with the Re number when Re> 100-300, and the shape and size of the vortices almost remain constant when Re>1000. The bend loss coefficient Kb was observed to be related with the Re number when Re<100, with the Re number and channel size when Re>100. It almost keeps constant and changes in the range of ± 10% When Re is larger than some value in 1300-1500. And a size effect on Kb was also observed.

Experimental investigation of a twice-shocked spherical gas inhomogeneity with particle image velocimetry

Shock Waves ◽  
2011 ◽  
Vol 21 (3) ◽  
pp. 225-231 ◽  
Author(s):  
N. Haehn ◽  
C. Weber ◽  
J. Oakley ◽  
M. Anderson ◽  
D. Ranjan ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Particle Image Velocimetry ◽  
Particle Image ◽  
Image Velocimetry
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