年間 18 号発行
ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561
Indexed in
Generation of Helicity and the Critical Transitions in a Twisted Flow of a Single-Phase Liquid
要約
Equations to determine the rate of change of the helicity in a dynamic liquid system are obtained. For the convenience of carrying out engineering calculations the equations are presented in dimensional and dimensionless forms. The conditions for critical transition to a helical character of a twisted flow and to the crisis-induced rearrangement of the flow velocity field due to the change in the flow vortex structure are considered.
A new physical model of the vortex motion of a liquid is suggested. It allows one to explain a number of phenomena: the effect of spontaneous flow twisting in the collectors of tank-type nuclear reactors; the reason for the considerable increase in the nonuniformity of the radial distribution of pressure at the inlet into the active zone for liquid-metal heat-transfer agents as compared to the water one; the crisis-induced rearrangement of the flow velocity field with formation of large-scale vortex structures during flow in curvilinear channels and of spiral vortices on curvilinear surfaces.
-
Giannakopoulos Antonios E., Sofos Filippos, Karakasidis Theodoros E., Liakopoulos Antonios, A quasi-continuum multi-scale theory for self-diffusion and fluid ordering in nanochannel flows, Microfluidics and Nanofluidics, 17, 6, 2014. Crossref