A laser droppler anemometry study of the development of an initially turbulent flow in a horizontal tube

(1991) A laser droppler anemometry study of the development of an initially turbulent flow in a horizontal tube. Masters thesis, King Fahd University of Petroleum and Minerals.

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Arabic Abstract

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English Abstract

Laser doppler anemometry was employed to study the development of an initially uniform turbulent flow of water in a horizontal straight tube without a diffuser at the inlet. The study was carried out for three different Reynolds numbers in the laminar, transitional and turbulent regimes. For low Reynolds number flow, relaminarization takes place. The velocity profile approaches the known parabolic profile within 45 tube diameters at about twice the rate reported for pipe systems with a diffuser at the inlet. Turbulence intensity is also found to decay more rapidly. No fully developed profile is observed for the transitional Reynolds number flow, while a power law profile is established for the higher Reynolds flow after an inlet length of about 30 tube diameters. Further analysis of centerline velocity distributions reveals an asymmetric behavior as the flow develops. No particular trend for the flatness is observed.

Item Type: Thesis (Masters)
Subjects: Physics
Divisions: College Of Sciences > Physics Dept
Committee Advisor: Klein, Uwe Karl Albert
Committee Members: Habib, Mohammed A. and Al-Adel, Fida F.
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 16:58
Last Modified: 01 Nov 2019 16:57
URI: http://eprints.kfupm.edu.sa/id/eprint/10177