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Some Observations of Flow Patterns and Statistical Properties of Three Component Flows

Kytomaa, H. K. and Brennen, C. E. (1986) Some Observations of Flow Patterns and Statistical Properties of Three Component Flows. In: International Symposium on Slurry Flows : presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Anaheim, California, December 7-12, 1986. Fluids Engineering Division. Vol.FED-38. No.38. American Society of Mechanical Engineers , New York, NY, pp. 95-101.

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Air-water flows, solids-water flows and three component air-solids-water flows in a vertical pipe have been investigated in a Three Component Flow Facility. Visual observations of the patterns show that the three component flow exhibits strong unsteady vertical motions which do not occur in the two phase flows studied. Quantitative results of the fluctuating component of the cross-sectionally averaged volume fraction measurements are presented, and related to the nature of the flows. The ratio of the steady component to the r.m.s of the fluctuating component of the volume fraction measurement (Signal To Noise Ratio) is found to be a good flow structure indicator. Remarkably, the solids-water flows and the bubbly air-water flows exhibit almost identical signal to noise ratios for the same volume fraction. However, the corresponding values for the three component flows reflect greater fluctuations corresponding to the vertical structures.

Item Type:Book Section
Additional Information:The authors wish to thank Danamichele Brennen for help with the experiment and data reduction.
Series Name:Fluids Engineering Division
Issue or Number:38
Record Number:CaltechAUTHORS:KYTasmessf86
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:218
Deposited By: Christopher Brennen
Deposited On:13 Dec 2004
Last Modified:02 Oct 2019 22:31

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