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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Print: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v15.i1.10
pages 1-15

NEAR-BED PARTICLE MOTION DUE TO TURBULENT FLOW USING IMAGE-PROCESSING TECHNIQUE

B. S. Mazumder
Fluvial Mechanics Laboratory Physics and Applied Mathematics Unit Indian Statistical Institute Kolkata - 700108, India
Anindita Bhattacharyya
Fluvial Mechanics Laboratory, Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata 700108, India
Satya P. Ojha
Fluvial Mechanics Laboratory Physics and Applied Mathematics Unit Indian Statistical Institute Kolkata - 700108, India

ABSTRACT

The objective of this paper is to examine the behavior of particle movement due to near-bed turbulence over the rough bed surface in an open channel flow. The fluid velocity components with fluctuations are measured by 3D Micro-acoustic Doppler velocimeter (ADV) and subsequently, under given flow conditions images of released moving particles are recorded using a High-Speed Motion-Scope (HSMS) at the Fluvial Mechanics Laboratory of the Indian Statistical Institute, Calcutta. The recorded images are analyzed in the light of particle motions, trajectories, saltation heights and lengths of individual particles, angles of orientation and their interactions with the boundary using a digital image processing technique. The statistical distributions of the physical parameters of turbulence and particle motion have been discussed. The particle motion analysis at the near-bed turbulence using the image processing technique is a new emerging tool to the sediment sorting process.


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