Journal article
Discriminator laser Doppler velocimetry for measurement of liquid and particle velocities in sediment-laden flows
Experiments in fluids, Vol.22(1), pp.45-56
11/01/1996
DOI: 10.1007/BF01893305
Abstract
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.
Details
- Title: Subtitle
- Discriminator laser Doppler velocimetry for measurement of liquid and particle velocities in sediment-laden flows
- Creators
- M Muste - University of IowaR. N Parthasarathy - University of OklahomaV. C Patel - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Experiments in fluids, Vol.22(1), pp.45-56
- Publisher
- Springer
- DOI
- 10.1007/BF01893305
- ISSN
- 0723-4864
- eISSN
- 1432-1114
- Language
- English
- Date published
- 11/01/1996
- Academic Unit
- Geographical and Sustainability Sciences; IIHR--Hydroscience and Engineering; Mechanical Engineering
- Record Identifier
- 9984459626902771
Metrics
2 Record Views