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RAS Energy, Mechanics & ControlПрикладная математика и механика Journal of Applied Mathematics and Mechanics

  • ISSN (Print) 0032-8235
  • ISSN (Online) 3034-5758

STRUCTURE OF A LOCALLY TURBULENT FLOW FORMED WHEN A PART OF THE FLUID LEAVES INTO THE SIDE BRANCH OF A CIRCULAR TUBE

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PII
S3034575825050023-1
DOI
10.7868/S3034575825050023
Publication type
Article
Status
Published
Authors
E.M. Smirnov
  • Affiliation: Peter the Great St. Petersburg Polytechnic University
Ya.A. Gataulin
  • Affiliation: Peter the Great St. Petersburg Polytechnic University
E.V. Kolesnik
  • Affiliation: Peter the Great St. Petersburg Polytechnic University
Volume/ Edition
Volume 89 / Issue number 5
Pages
703-717
Abstract
The results of a numerical study of unsteady viscous fluid flow in the area of the branching of a circular cross-section channel at an angle of 60° are presented for four values of the inlet Re number that are less than or equal to 1475; in the upstream region, the channel flow is assumed to be unperturbed and fully-developed. The main results relate to the case of equality of the flow rates in two branches, with flow separation regions in both branches. It was shown, in particular, that at Re = 750, intense quasi-periodic oscillations develop in the computational domain due to the Kelvin-Helmholtz instability. At Re = 1475, a zone of locally turbulent motion is formed in the flow, the size of which depends on the proportion of the flow going into the side branch. The vortex pattern of the flow and the type of the velocity pulsation spectrum at various points in the region are analyzed.
Keywords
численное моделирование динамика вязкой жидкости разветвление канала отрывное течение гидродинамические неустойчивости локальная турбулентность
Date of publication
01.05.2025
Year of publication
2025
Number of purchasers
0
Views
16

References

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