Journal article
Experimental comparison of two laser-based velocimeters for flows with alluvial sand
Experiments in fluids, Vol.24(4), pp.273-284
1998
DOI: 10.1007/s003480050174
Abstract
Nonintrusive measurements in a sediment-laden flow using two laser-based techniques, Discriminator Laser-Doppler Velocimetry (DLDV) and Particle Tracking Velocimetry (PTV), are compared. DLDV was previously developed at the Iowa Institute of Hydraulic Research, while PTV was specially configured for this application. Mean and fluctuating velocity components for both flow fractions were simultaneously measured in a laboratory-scale, submerged water jet loaded with alluvial sand. This information cannot be obtained using existing measurement techniques. The jet Reynolds number was 6120, and the sediment sieve diameter ranged from 0.5 to 0.6 mm. Small mass loadings of sand with inertial time constant τP of 0.6 ms were examined. The configuration, operation, and results obtained using the DLDV and PTV are presented. For each technique, means to precisely distinguish between the light scattered by suspended sand and that originating from seed-particles following the water were implemented. The agreement in measurement for the two methods validates one another since they are based on completely different principles of operation. The capabilities of DLDV and PTV to reliably measure sand and water velocities in sediment-laden flows are further indicated by the agreement of the present findings with those obtained previously in similar studies. The comparison suggests that PTV, due to its whole field nature, could become a powerful tool for flow and particle-related diagnostics, yielding fundamental information in an area with a long history of conflicting experimental evidence.
Details
- Title: Subtitle
- Experimental comparison of two laser-based velocimeters for flows with alluvial sand
- Creators
- M MUSTE - Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, IA 55242-1585, United StatesI FUJITA - Fujita Department of Civil Engineering, Gifu University, Gifu, JapanA KRUGER - Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, IA 55242-1585, United States
- Resource Type
- Journal article
- Publication Details
- Experiments in fluids, Vol.24(4), pp.273-284
- Publisher
- Springer
- DOI
- 10.1007/s003480050174
- ISSN
- 0723-4864
- eISSN
- 1432-1114
- Language
- English
- Date published
- 1998
- Academic Unit
- Electrical and Computer Engineering; IIHR--Hydroscience and Engineering; Mechanical Engineering; Civil and Environmental Engineering; Geographical and Sustainability Sciences
- Record Identifier
- 9984083823102771
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