caa a22 4500 477092713 CHVBK 20180405111519.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF01893305 doi (NATIONALLICENCE)springer-10.1007/BF01893305 Discriminator laser Doppler velocimetry for measurement of liquid and particle velocities in sediment-laden flows [Elektronische Daten] [M. Muste, V. Patel, R. Parthasarathy] An accurate non-intrusive method of measurement of liquid and sediment velocities, called Discriminator Laser Doppler Velocimetry (DLDV) is described. The DLDV arrangement consists of a LDV, and a discriminator system that utilizes near on-axis diffraction from sediment particles passing through or grazing the LDV measurement volume to result in strong voltage signals. For liquid velocity statistics, velocity measurements associated with a discriminator voltage above a threshold are discarded; the discriminator signal is used to validate that only particle velocities are recorded during particle velocity measurement. Possible error sources in the use of DLDV are discussed. Measurements using DLDV in an open-channel alluvial sand-laden flow indicate differences between liquid and particle velocities even for dilute sand concentrations. Springer-Verlag, 1996 Muste M. Iowa Institute of Hydraulic Research, The University of Iowa, 52242-1585, Iowa City, IA, USA aut Patel V. Iowa Institute of Hydraulic Research, The University of Iowa, 52242-1585, Iowa City, IA, USA aut Parthasarathy R. School of Aerospace and Mechanical Engineering, The University of Oklahoma Norman, 212 Felgar Hall, 865 Asp Avenue, 73019-0601, OK, USA aut Experiments in Fluids Springer-Verlag 22/1(1996-11-01), 45-56 0723-4864 22:1<45 1996 22 348 https://doi.org/10.1007/BF01893305 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01893305 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Muste M. Iowa Institute of Hydraulic Research, The University of Iowa, 52242-1585, Iowa City, IA, USA aut NATIONALLICENCE 700 1- Patel V. Iowa Institute of Hydraulic Research, The University of Iowa, 52242-1585, Iowa City, IA, USA aut NATIONALLICENCE 700 1- Parthasarathy R. School of Aerospace and Mechanical Engineering, The University of Oklahoma Norman, 212 Felgar Hall, 865 Asp Avenue, 73019-0601, OK, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer-Verlag 22/1(1996-11-01), 45-56 0723-4864 22:1<45 1996 22 348 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer