Effect of aspect ratio on higher order moments of velocity fluctuations in hydraulically rough open channel flow

被引：0

作者：

Mahananda, Minakshee ^{[1
]}

Hanmaiahgari, Prashanth Reddy ^{[1
]}

机构：

[1] IIT Kharagpur, Dept Civil Engn, Kharagpur 721302, W Bengal, India

来源：

NINTH INTERNATIONAL CONFERENCE ON FLUVIAL HYDRAULICS (RIVER FLOW 2018) | 2018年 / 40卷

关键词：

TURBULENCE;

D O I：

10.1051/e3sconf/20184005045

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

The effect of aspect ratio on the higher order statistics of velocity fluctuations in a hydraulically rough turbulent open channel flow is investigated. In this regard, an experiment was conducted in a rough bed narrow open channel flow of aspect ratio equal to three and the instantaneous flow velocities were measured using a Nortek Vectrino+ Acoustic Doppler Velocimeter. To understand the effect of aspect ratio, the results obtained from the present study are compared with the literature data of approximately same Reynolds number and bed roughness in a wide open channel flow for turbulence intensities and higher order statistics of velocity fluctuations. Comparison of turbulence intensities between Narrow OCF and Wide OCF shows occurrence of higher streamwise and vertical turbulence intensities in the outer region of Narrow OCF. The results of third order moments of velocity fluctuations are sensitive to aspect ratio in the outer region.

引用

页数：8

共 50 条

[21] Effect of channel aspect ratio on the flow performance of a spiral-channel viscous micropump
Kilani, M. I.
Al-Salaymeh, A.
Al-Halhouli, A. T.
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2006, 128 (03): : 618 - 627
[22] Solid-flow interactions of a large aspect ratio cylinder in a shallow open channel
Miguntanna, Nadeeka S.
Sivakumar, Muttucumaru
Yang, Shu-Qing
Enever, Keith
Bin Riaz, Muhammad Zain
PHYSICS OF FLUIDS, 2020, 32 (05)
[23] Higher-order moments and spectra of velocity fluctuations in adverse-pressure-gradient turbulent boundary layer
Nagano Y.
Houra T.
Experiments in Fluids, 2002, 33 (01) : 22 - 30
[24] Study the effect of seepage on the higher order moment to extract information about the turbulent flow structure in an open channel flow
Al Faruque, Md Abdullah
Balachandar, Ram
5TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING, 2013, 56 : 263 - 268
[25] THE EFFECT OF EDDY VISCOSITY ON THE VELOCITY PROFILE OF STEADY FLOW IN A UNIFORM ROUGH CHANNEL
HAQUE, SMA
JOURNAL OF FLUID MECHANICS, 1959, 5 (02) : 310 - 316
[26] Effect of roughness aspect ratio on the ''bursting'' period in a fully turbulent channel flow
Labraga, L
Mazouz, A
Demare, S
Tournier, C
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 1997, 119 (02): : 469 - 471
[27] Effect of roughness aspect ratio on the bursting period in a fully turbulent channel flow
Laboratoire de Mecanique des Fluides, Universite' de Valenciennes, 59326 Valenciennes Cedex, France
J Fluids Eng Trans ASME, 2 (469-471):
[28] Effect of running propellers on flow and hinge moments of trailing edge mechanization of high aspect ratio
Pigusov, E. A.
Pavlenko, O. V.
Kornushenko, A. V.
Vinogradov, O. N.
Reslan, M. G.
ST PETERSBURG POLYTECHNIC UNIVERSITY JOURNAL-PHYSICS AND MATHEMATICS, 2023, 16 (01): : 295 - 300
[29] STATIONARY BOTTOM GENERATED VELOCITY FLUCTUATIONS IN ONE-DIMENSIONAL OPEN-CHANNEL FLOW
DEJONG, B
DYNAMICS OF ATMOSPHERES AND OCEANS, 1993, 20 (1-2) : 185 - 202
[30] The effect of submerged groynes in a near-natural rough open channel flow
Sindelar, Christine
Lichtneger, Petr
Habersack, Helmut
PROCEEDINGS OF THE 39TH IAHR WORLD CONGRESS, 2022, : 1021 - 1026

← 1 2 3 4 5 →