Onedimensional probability distribution laws of velocity fluctuations in turbulent flow in a circular tube
Abstract
The onedimensional probability density distributions of the fluctuations of the longitudinal velocity component of fully developed turbulent flow in a circular channel with smooth walls were studied at Reynolds numbers of 40,000 and 80,000 at a distance of 80 mm from the inlet. Measurements were made with a Danish DISA hotwire anemometer (employing a linearizer) and with a French CRC 256channel pulseamplitude analyzer. It is shown that the probability density distributions are satisfactorily approximated by Pearson curves at any point of the tube crosssection and that all the probability characteristics of the velocity fluctuations depend on the Reynolds number, particularly near the wall.
 Publication:

Akademiia Nauk SSSR Sibirskoe Otdelenie Izvestiia Seriia Tekhnicheskie Nauki
 Pub Date:
 October 1975
 Bibcode:
 1975SiSSR........3B
 Keywords:

 Flow Velocity;
 Pipe Flow;
 Probability Density Functions;
 Turbulent Flow;
 Annular Flow;
 Circular Tubes;
 HotWire Anemometers;
 Reynolds Number;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer