Open AccessInfluence of gas flow turbulence scale on heat exchange intensity in a long smooth pipe
Author(s) -
Alexandr Nevolin,
Leonid Osipov,
Л. В. Плотников
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1867/1/012001
Subject(s) - turbulence , turbulence kinetic energy , mechanics , heat transfer , dynamic scraped surface heat exchanger , k epsilon turbulence model , heat transfer coefficient , churchill–bernstein equation , boundary layer , thermodynamics , k omega turbulence model , reynolds number , intensity (physics) , turbulence modeling , flow (mathematics) , convective heat transfer , computational fluid dynamics , physics , materials science , critical heat flux , nusselt number , optics
It is known that the initial level of gas flow turbulence has a noticeable effect on the development and structure of the boundary layer and on the intensity of heat transfer, respectively. Many scientists have evaluated the influence of the flow turbulence number on the level of heat transfer for various applications, among them Dyban E.P., Kestin J., Simonich JC, Isomoto K., Dreitser G.A., Terekhov V.I., MacMullin R. and etc. In all cases, the turbulence of the flow led to the intensification of heat transfer. However, insufficient attention is paid to studies of the effect of turbulence on the heat transfer of flows in pipes. The studies were carried out on the basis of numerical modeling of gas dynamics and heat transfer of stationary flows based on the CFD method. The results of numerical modeling to assess the influence of the turbulence scale of gas flows on heat transfer in a long smooth pipe are presented in the article. It has been established that a growth in the heat transfer coefficient by about 3% occurs with an increase in the turbulence scale from 10 to 30% with a Reynolds number equal to 250,000.