Teplofizika vysokikh temperatur
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Teplofizika vysokikh temperatur, 2019, Volume 57, Issue 3, Pages 426–430
DOI: https://doi.org/10.1134/S0040364419030141
(Mi tvt11043)
 

Heat and Mass Transfer and Physical Gasdynamics

Simple wave transformations in the channel

L. N. Pyatnitskiĭ

Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow
References:
Abstract: The Riemann wave describes the plane flow behind an infinite wavefront, though it is used to describe its propagation in channels. The influence of the walls on the process of wave propagation is not taken into account. However, friction against the walls slows the flow, and the limited diameter of the elementary plane waves, which compensate for the friction, undergo diffraction divergence. As a result, the entropy constancy and laminar flow structure are violated. This means that a simple wave as such may not exist in the channel. In this case, analysis of the friction and diffraction divergence make it possible to explain the turbulence occurrence in the flow and to find a way to form a simple wave of finite aperture with a large Rayleigh length.
Received: 22.04.2018
Revised: 07.11.2018
Accepted: 25.12.2018
English version:
High Temperature, 2019, Volume 57, Issue 3, Pages 388–392
DOI: https://doi.org/10.1134/S0018151X1903012X
Bibliographic databases:
Document Type: Article
UDC: 533.6.01
Language: Russian
Citation: L. N. Pyatnitskiǐ, “Simple wave transformations in the channel”, TVT, 57:3 (2019), 426–430; High Temperature, 57:3 (2019), 388–392
Citation in format AMSBIB
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  • https://www.mathnet.ru/eng/tvt/v57/i3/p426
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