Investigation of turbulence on the molecular level

S. A. Novopashin

Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: The influence of the molecular structure of gas flows on the characteristics of turbulent flows and the effect of the properties molecules on turbulent processes have been studied. This paper presents a review of the results of study of turbulent processes. Data on flows at the boundary of a supersonic jet and in a tube with an expanding input section, and Hagen–Poiseuille flow are given. Experimental study of Hagen–Poiseuille has shown that the molecular properties of the medium affect the critical Reynolds number. It is shown that in comparing the critical Reynolds numbers for flows of different gases at different pressures, the determining parameter is the second virial coefficient.

Keywords: turbulence, laminar-turbulent transition, Hagen–Poiseuille, second virial coefficient.

UDC: 532.5.03, 533.5

Received: 03.07.2018

DOI: 10.15372/PMTF20180502

 English version: Journal of Applied Mechanics and Technical Physics, 2018, 59:5, 778–785

Bibliographic databases:

•