230 Experimental study of rotation effect on vortex structure in oscillating-grid turbulence

2016 ◽  
Vol 2016.65 (0) ◽  
pp. _230-1_-_230-2_
Author(s):  
Masaki MIZUOCHI ◽  
Mitsuhiro KIMURA ◽  
Shinji TAMANO ◽  
Yohei MORINISHI
Keyword(s):  
Experimental Study ◽  
Vortex Structure ◽  
Grid Turbulence ◽  
Rotation Effect ◽  
Oscillating Grid

166 Experimental study on turbulence diffusion and vortex structure in rotating oscillating-grid turbulence

2015 ◽  
Vol 2015.64 (0) ◽  
pp. _166-1_-_166-2_
Author(s):  
Mitsuhiro KIMURA ◽  
Masaki MIZUOCHI ◽  
Shinji TAMANO ◽  
Yohei MORINISHI
Keyword(s):  
Experimental Study ◽  
Vortex Structure ◽  
Grid Turbulence ◽  
Oscillating Grid

Experimental study on oscillating grid turbulence and free surface fluctuation

2012 ◽  
Vol 53 (5) ◽  
pp. 1515-1531 ◽  
Author(s):  
Luca Chiapponi ◽  
Sandro Longo ◽  
Mara Tonelli
Keyword(s):  
Experimental Study ◽  
Free Surface ◽  
Grid Turbulence ◽  
Surface Fluctuation ◽  
Oscillating Grid

Experimental Study on the Drag-Reducing Characteristics in Two-Oscillating Grid Turbulence With Polymer Additives

2016 ◽  
Author(s):  
Yue Wang ◽  
Weihua Cai ◽  
Tong-zhou Wei ◽  
Feng-chen Li ◽  
Li-ming Yao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Kinetic Energy ◽  
Drag Reduction ◽  
Polymer Solution ◽  
Turbulent Kinetic Energy ◽  
Newtonian Fluid ◽  
Reduction Rate ◽  
Grid Turbulence ◽  
Solution Flow ◽  
Oscillating Grid

In this paper, we carried out the experimental study to investigate the polymer effect on two-oscillating grid turbulence based on Particle Image Velocimetry. We chose five different concentrations (25, 50, 100, 150 and 200ppm) of polymer solution flow and the Newtonian fluid flow for comparison at three different grid oscillating frequencies (5, 7.5 and 10Hz). The results showed that comparison with the Newtonian fluid case, the turbulent kinetic energy is much smaller in polymer solution cases. A natural definition for drag reduction rate was proposed based on turbulent kinetic energy. It showed that the maximum drag reduction reaches around 80% and the drag-reducing effect increases as the concentration increases. Finally, proper orthogonal decomposition (POD) was used to extract coherent structures in grid turbulence.

1011 Experimental Study of the Micromixer Using the Chaos of Secondary Flow(Rotation Effect of the Channel)

2011 ◽  
Vol 2011.49 (0) ◽  
pp. 299-300
Author(s):  
Kazunori NISHIDA ◽  
Yasutaka HAYAMIZU ◽  
Shinichi MORITA ◽  
Shigeru OHTSUKA ◽  
Shinichiro YANASE ◽  
...  
Keyword(s):  
Experimental Study ◽  
Secondary Flow ◽  
Rotation Effect

704 Experimental study on decaying grid turbulence of surfactant solution(1)

2006 ◽  
Vol 2006 (0) ◽  
pp. _704-a_
Author(s):  
Shigeya Kawada ◽  
Masayuki Hasegawa ◽  
Yoshiyuki Tuji ◽  
Yutaka Kukita
Keyword(s):  
Experimental Study ◽  
Surfactant Solution ◽  
Grid Turbulence

704 Experimental study on decaying grid turbulence of surfactant solution(2)

2006 ◽  
Vol 2006 (0) ◽  
pp. _704-1_-_704-4_
Author(s):  
Shigeya Kawada ◽  
Masayuki Hasegawa ◽  
Yoshiyuki Tuji ◽  
Yutaka Kukita
Keyword(s):  
Experimental Study ◽  
Surfactant Solution ◽  
Grid Turbulence
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