Research Article
Jul 1970
Inception and Entrainment in Self-Aerated Flows
Authors: Thimmaiah Gangadharaiah, Nagar S. Lakshmana Rao, AM.ASCE, and Kyathasandra Seetharamiah, F.ASCEAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 96, Issue 7
Abstract
Inception and entrainment of air in self-aerated open channel flows are studied. For inception to occur surface eddies should leave the free surface and the whole fluid should be turbulent. A criterion for the surface eddy to leave the free surface is formulated using the energy concept. A method to locate the zone of boundary layer emergence to the free surface which causes the whole fluid to be turbulent in the case of flow over free overfall spillways is developed. Using the concept of entrainment, the basic equations for aerated flow down prismatic channels are formulated. Using these equations, several flow characteristics of the uniform aerated flow are studied. The investigations help in computing uniform aerated flow characteristics knowing the non-aerated flow data.
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Published In
Journal of the Hydraulics Division
Volume 96 • Issue 7 • July 1970
Pages: 1549 - 1565
Copyright
© 1970 American Society of Civil Engineers.
History
Published in print: Jul 1970
Published online: Feb 3, 2021
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Authors
Affiliations
Thimmaiah Gangadharaiah
Sr. Res. Asst. of Civ. and Hydr. Engrg. Dept., Indian Inst. of Sci., Bangalore, India
Nagar S. Lakshmana Rao, AM.ASCE
Assoc. Prof. of Civ. and Hydr. Engrg. Dept., Indian Inst. of Sci., Bangalore, India
Kyathasandra Seetharamiah, F.ASCE
Prof. of Civ. and Hydr. Engrg. Dept., Indian Inst. of Sci., Bangalore, India
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