Research Article
Oct 1981
Settling Velocity of Spherical Particles in Calm Water
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VIEW THE REPLYAuthors: Jean L. Boillat and Walter H. Graf, M.ASCEAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 107, Issue 10
Abstract
The settling velocities of round and smooth spherical particles in calm water at 200 /LT R /LT 6,000 were analysed utilizing modern measuring techniques. When the present results are compared with the standard CTS = f(R) curve, they fall on the average 20 percent higher. However, the standard curve was established with the majority of data derived from fixed spheres tested in wind tunnels. Because the experiments are limited, a new drag coefficient cannot be made. To settle the existing discrepancy between fixed and falling spheres, it will be necessary to do further research, Possibly focusing on the effect of the Strouhal number on the drag of freely falling spheres.
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Published In
Journal of the Hydraulics Division
Volume 107 • Issue 10 • October 1981
Pages: 1123 - 1131
Copyright
© 1981 American Society of Civil Engineers.
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Published in print: Oct 1981
Published online: Feb 3, 2021
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Jean L. Boillat
Research Asst., Lab. d'hydraulique, Ecole Polytechnique Federale, CH-1015 Lausanne, Switzerland
Walter H. Graf, M.ASCE
Prof. and Dir., Lab. d'hydraulique, Ecole Polytechnique Federale, CH-1015 Lausanne, Switzerland
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.