TY - JOUR
T1 - Sidewall and non-uniformity corrections for flume experiments
AU - Guo, Junke
N1 - Funding Information:
Service members aboard the USS Theodore Roosevelt; Naval Medical Forces Pacific; Navy Environmental and Preventive Medicine Units 2 and 6; U.S. Naval Hospital Guam; Lisa Pearse, Brianna Rupp, Jefferson Moody, Azad Al-Koshnaw, W. Thane Hancock,
Publisher Copyright:
© 2014 International Association for Hydro-Environment Engineering and Research.
PY - 2015/3/4
Y1 - 2015/3/4
N2 - Studying open channel flow and sediment transport in narrow flumes under non-uniform flow conditions, both sidewall and non-uniformity corrections are required for bed-shear stress. This research first reviews conventional predictive methods for bed-shear stress, including the flow-depth method, the hydraulic radius method and Einstein's sidewall correction. It then presents a novel procedure for sidewall and non-uniformity corrections based on a recent cross-sectional velocity distribution model. These methods are compared with data from the log-law under uniform and non-uniform, sub- and supercritical flow conditions, indicating that (i) the flow-depth and the hydraulic radius methods specify the upper and lower bounds for bed-shear stress; (ii) although Einstein's procedure causes a paradox for smooth flumes, it agrees with data from rough beds; and (iii) the proposed is better than Einstein's for subcritical flow, but the latter has advantage for supercritical flow. As an application, sediment inception under non-uniform flow conditions is also discussed.
AB - Studying open channel flow and sediment transport in narrow flumes under non-uniform flow conditions, both sidewall and non-uniformity corrections are required for bed-shear stress. This research first reviews conventional predictive methods for bed-shear stress, including the flow-depth method, the hydraulic radius method and Einstein's sidewall correction. It then presents a novel procedure for sidewall and non-uniformity corrections based on a recent cross-sectional velocity distribution model. These methods are compared with data from the log-law under uniform and non-uniform, sub- and supercritical flow conditions, indicating that (i) the flow-depth and the hydraulic radius methods specify the upper and lower bounds for bed-shear stress; (ii) although Einstein's procedure causes a paradox for smooth flumes, it agrees with data from rough beds; and (iii) the proposed is better than Einstein's for subcritical flow, but the latter has advantage for supercritical flow. As an application, sediment inception under non-uniform flow conditions is also discussed.
KW - Bed-shear stress
KW - Einstein's procedure
KW - flume experiment
KW - non-uniform flow
KW - sidewall correction
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U2 - 10.1080/00221686.2014.971449
DO - 10.1080/00221686.2014.971449
M3 - Review article
AN - SCOPUS:84929272818
VL - 53
SP - 218
EP - 229
JO - Journal of Hydraulic Research/De Recherches Hydrauliques
JF - Journal of Hydraulic Research/De Recherches Hydrauliques
SN - 0022-1686
IS - 2
ER -