An experimental study on characteristics of turbulence generated by oscillating grids in a wave tank

Ma Hongyu; Dai Dejun; Qiao Fangli; Jiang Shumin

doi:10.3969/j.issn.0253-4193.2017.12.002

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Ma Hongyu, Dai Dejun, Qiao Fangli, Jiang Shumin. An experimental study on characteristics of turbulence generated by oscillating grids in a wave tank[J]. Haiyang Xuebao, 2017, 39(12): 12-19. doi: 10.3969/j.issn.0253-4193.2017.12.002

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Ma Hongyu, Dai Dejun, Qiao Fangli, Jiang Shumin. An experimental study on characteristics of turbulence generated by oscillating grids in a wave tank[J]. Haiyang Xuebao, 2017, 39(12): 12-19. doi: 10.3969/j.issn.0253-4193.2017.12.002

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An experimental study on characteristics of turbulence generated by oscillating grids in a wave tank

doi: 10.3969/j.issn.0253-4193.2017.12.002

1.
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China;Key Laborotry of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China;The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
Key Laborotry of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China;The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received Date: 2017-01-03
Rev Recd Date: 2017-04-11

Abstract

Abstract

In this paper, we study the characteristics of turbulence generated by oscillating grids in a wave tank. Four experiments are carried out. High-frequency velocity fluctuations with different depths of measurement points, vibration frequency, vibration stroke were recorded by an acoustic Doppler velocimeter (ADV). The experiments results show that, the turbulence strength becomes weak with increasing the distance from measurement points to grid position, becomes strong with increasing vibration frequency and vibration stoke respectively as power function. At the meantime, the turbulence strength of two different grids was compared. From the results we know that the length of grid has great influence on turbulence strength, this is different from the turbulence characteristic in a water box.
- wave tank,
- oscillating grid,
- turbulence

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References

Rouse H. Experiments on the mechanics of sediment suspension[C]//Proceedings of the 5th international congress of applied mechanics. Cambridge, MA, 1939:550-554.

Rouse H, Dodu J. Turbulent diffusion across a density discontinuity[J]. La Houille Blanche, 1955, 10(4):522-532.

Thompson S M, Turner J S. Mixing across an interface due to turbulence generated by an oscillating grid[J]. Journal of Fluid Mechanics, 1975, 67(2):349-368.

Hopfinger E J, Toly J A. Spatially decaying turbulence and its relation to mixing across density interfaces[J]. Journal of Fluid Mechanics, 1976, 78(1):155-175.

Brumley B H, Jirka G H. Near-surface turbulence in a grid-stirred tank[J]. Journal of Fluid Mechanics, 1987, 183:235-263.

De Silva I P D, Fernando H J S. Oscillating grids as a source of nearly isotropic turbulence[J]. Physics of Fluids, 1994, 6(7):2455-2464.

Variano E A, Cowen E A. A random-jet-stirred turbulence tank[J]. Journal of Fluid Mechanics, 2008, 604:1-32.

Maxey M R. The velocity skewness measured in grid turbulence[J]. Physics of Fluids, 1987, 30(4):935-938.

Douady S, Couder Y, Brachet M E. Direct observation of the intermittency of intense vorticity filaments in turbulence[J]. Physical Review Letters, 1991, 67(8):983-986.

Villermaux E, Sixou B, Gagne Y. Intense vortical structures in grid-generated turbulence[J]. Physics of Fluids, 1995, 7(8):2008-2013.

Srdic A, Fernando H J S, Montenegro L. Generation of nearly isotropic turbulence using two oscillating grids[J]. Experiments in Fluids, 1996, 20(5):395-397.

Shy S S, Tang C Y, Fann S Y. A nearly isotropic turbulence generated by a pair of vibrating grids[J]. Experimental Thermal and Fluid Science, 1997, 14(3):251-262.

Voth G A, Satyanarayan K, Bodenschatz E. Lagrangian acceleration measurements at large Reynolds numbers[J]. Physics of Fluids, 1998, 10(9):2268-2280.

Liu S, Katz J, Meneveau C. Evolution and modelling of subgrid scales during rapid straining of turbulence[J]. Journal of Fluid Mechanics, 1999, 387:281-320.

Birouk M, Sarh B, Gökalp I. An attempt to realize experimental isotropic turbulence at low Reynolds number[J]. Flow, Turbulence and Combustion, 2003, 70(1/4):325-348.

Hwang W, Eaton J K. Creating homogeneous and isotropic turbulence without a mean flow[J]. Experiments in Fluids, 2004, 36(3):444-454.

Webster D R, Brathwaite A, Yen J. A novel laboratory apparatus for simulating isotropic oceanic turbulence at low Reynolds number[J]. Limnology and Oceanography:Methods, 2004, 2(1):1-12.

Mcdougall T J. Measurements of turbulence in a zero-mean-shear mixed layer[J]. Journal of Fluid Mechanics, 1979, 94(3):409-431.

Variano E A, Bodenschatz E, Cowen E A. A random synthetic jet array driven turbulence tank[J]. Experiments in Fluids, 2004, 37(4):613-615.

Krawczynski J F, Renou B, Danaila L. The structure of the velocity field in a confined flow driven by an array of opposed jets[J]. Physics of Fluids, 2010, 22(4):045104.

Goepfert C, Marié J L, Chareyron D, et al. Characterization of a system generating a homogeneous isotropic turbulence field by free synthetic jets[J]. Experiments in Fluids, 2010, 48(5):809-822.

Bellani G, Variano E A. Homogeneity and isotropy in a laboratory turbulent flow[J]. Experiments in Fluids, 2014, 55(1):1-12.

Hunt J C R, Graham J M R. Free-stream turbulence near plane boundaries[J]. Journal of Fluid Mechanics, 1978, 84(2):209-235.

Corrsin S. Turbulence:experiment methods[J]. Handbuch der Physik, Stromungs Mechanik, 1963, 8:524-587.

Xuequan E, Hopfinger E J. On mixing across an interface in stably stratified fluid[J]. Journal of Fluid Mechanics, 1986, 166:227-244.

Cheng N S, Law A W K. Measurements of turbulence generated by oscillating grid[J]. Journal of Hydraulic Engineering, 2001, 127(3):201-208.

Yi Y K, Lyn D A. Scaling and inhomogeneities in oscillating-grid flows[C]//Building Partnerships. ASCE, 2000:1-10.

王得祥, 王得军, 李艳. 水槽中振动格栅紊流特性实验研究[J]. 华北水利水电学院学报, 2007, 28(2):19-21. Wang Dexiang, Wang Dejun, Li Yan. Experimental study on characteristics of oscillating-grid turbulence in flume[J]. Journal of North China Institute of Water Consercancy and Hydrielectric Power, 2007, 28(2):19-21.

Thais L, Magnaudet J. Turbulent structure beneath surface gravity waves sheared by the wind[J]. Journal of Fluid Mechanics, 1996, 328:313-344.

Atkinson J F, Damiani L, Harleman D R F. A comparison of velocity measurements using a laser anemometer and a hotfilm probe, with application to grid-stirring entrainment experiments[J]. Physics of Fluids (1958-1988), 1987, 30(10):3290-3292.

Zedel L, Hay A E, Cabrera R, et al. Performance of a single-beam pulse-to-pulse coherent Doppler profiler[J]. IEEE Journal of Oceanic Engineering, 1996, 21(3):290-297.

Lohrmann A, Cabrera R, Kraus N C. Acoustic-Doppler velocimeter (ADV) for laboratory use[C]//Fundamentals and advancements in hydraulic measurements and experimentation. ASCE, 1994:351-365.

Cabrera R, Deines K, Brumley B, et al. Development of a practical coherent acoustic Doppler current profiler[C]//OCEANS'87. IEEE, 1987:93-97.

Lhermitte R, Lemmin U. Open-channel flow and turbulence measurement by high-resolution Doppler sonar[J]. Journal of Atmospheric and Oceanic Technology, 1994, 11(5):1295-1308.

Mori N, Suzuki T, Kakuno S. Noise of acoustic Doppler velocimeter data in bubbly flows[J]. Journal of Engineering Mechanics, 2007, 133:122-125.

Martin V, Fisher T S R, Millar R G, et al. ADV data analysis for turbulent flows:Low correlation problem[C]//Proceedings of Hydraulic Measurements and Experimental Methods Conference. 2002.

Elgar S, Raubenheimer B, Guza R T. Quality control of acoustic Doppler velocimeter data in the surfzone[J]. Measurement Science and Technology, 2005, 16(10):1889-1893.

Goring D G, Nikora V I. Despiking acoustic Doppler velocimeter data[J]. Journal of Hydraulic Engineering, 2002, 128(1):117-126.

Wahl T L. Discussion of "Despiking acoustic Doppler velocimeter data" by Derek G. Goring and Vladimir I.Nikora[J]. Journal of Hydraulic Engineering, 2002, 128(1):117-126.

Ölmez H S, Milgram J H. An experimental study of attenuation of short water waves by turbulence[J]. Journal of Fluid Mechanics, 1992, 239:133-156.

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