Skip to main content
Top
Published in: Fluid Dynamics 5/2023

01-10-2023

Numerical Simulation of the Formation and Motion of Turbulent Vortex Clouds (Puffs)

Authors: M. A. Zasimova, V. V. Ris, N. G. Ivanov

Published in: Fluid Dynamics | Issue 5/2023

Log in

Activate our intelligent search to find suitable subject content or patents.

search-config
loading …

Abstract

The results of numerical simulation of the formation and motion of turbulent vortex clouds (puffs) resulting from the blowing of pulsed jets with various initial velocities and durations are given. A model of axisymmetric turbulent flow described by the time-dependent Reynolds equations is adopted. It is shown that, regardless of the initial conditions, a puff which has the shape similar to a sphere develops after the same dimensionless time interval from the instant of jet outflow. In the rest of the space the vortex-induced flow is close to a potential flow. It is found that in the vortices the velocity profiles in the axial and transverse directions are close to self-similar profiles and similar each other for various conditions of outflow of pulsed jets. The time dependences of the geometric and kinematic characteristics of puffs, namely, the location of the cloud center (points with the maximum velocity) and the radius of a sphere equivalent in volume to the puff, as well as the maximum and mean velocities, are given and analyzed. For the jet outflow conditions considered, the characteristics of puffs turn out to be similar.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Literature
7.
go back to reference Fabregat, A., Gisbert, F., Vernet, A., Ferré, J.A., Mittal, K., Dutta, S., and Pallarès, J., Direct numerical simulation of turbulent dispersion of evaporative aerosol clouds produced by an intense expiratory event, Phys. Fluids, 2021, vol. 33, pp. 1–13. https://doi.org/10.1063/5.0045416CrossRef Fabregat, A., Gisbert, F., Vernet, A., Ferré, J.A., Mittal, K., Dutta, S., and Pallarès, J., Direct numerical simulation of turbulent dispersion of evaporative aerosol clouds produced by an intense expiratory event, Phys. Fluids, 2021, vol. 33, pp. 1–13. https://​doi.​org/​10.​1063/​5.​0045416CrossRef
9.
go back to reference Akhmetov, D.G., Vortex Rings, Berlin: Springer, 2009; Novosibirsk: GEO, 2007. Akhmetov, D.G., Vortex Rings, Berlin: Springer, 2009; Novosibirsk: GEO, 2007.
16.
go back to reference Zasimova M.A., Ivanov, N.G., and Ris, V.V., Non-stationary diffusion of viral particles in a pulsed jet formed during coughing, in: XVI Minsk International Forum on Heat and Mass Transfer. Abstracts and Messages. Minsk: ITMO im. A.V. Lykov, 2022, pp. 251–255. Zasimova M.A., Ivanov, N.G., and Ris, V.V., Non-stationary diffusion of viral particles in a pulsed jet formed during coughing, in: XVI Minsk International Forum on Heat and Mass Transfer. Abstracts and Messages. Minsk: ITMO im. A.V. Lykov, 2022, pp. 251–255.
18.
go back to reference Zasimova M.A., Ivanov, N.G., and Ris, V.V., URANS and LES simulation of the initial stage of propagation of a droplet-containing air jet characteristic of acute respiratory phenomena, in: Materials of the 8th RNKT, Moscow: Izd. MEI, 2022, vol. 1, pp. 435–438. Zasimova M.A., Ivanov, N.G., and Ris, V.V., URANS and LES simulation of the initial stage of propagation of a droplet-containing air jet characteristic of acute respiratory phenomena, in: Materials of the 8th RNKT, Moscow: Izd. MEI, 2022, vol. 1, pp. 435–438.
19.
go back to reference Pallarès, J., Fabregat, A., Lavrinenko, A., et al., Numerical simulations of the flow and aerosol dispersion in a violent expiratory event: Outcomes of the “2022 International Computational Fluid Dynamics Challenge on violent expiratory events,” Phys. Fluids, 2023, vol. 35, pp. 1–22. https://doi.org/10.1063/5.0143795CrossRef Pallarès, J., Fabregat, A., Lavrinenko, A., et al., Numerical simulations of the flow and aerosol dispersion in a violent expiratory event: Outcomes of the “2022 International Computational Fluid Dynamics Challenge on violent expiratory events,” Phys. Fluids, 2023, vol. 35, pp. 1–22. https://​doi.​org/​10.​1063/​5.​0143795CrossRef
22.
go back to reference Batchelor, G.K., An Introduction to Fluid Dynamics, Cambridge: Cambridge University Press, 2000.CrossRef Batchelor, G.K., An Introduction to Fluid Dynamics, Cambridge: Cambridge University Press, 2000.CrossRef
Metadata
Title
Numerical Simulation of the Formation and Motion of Turbulent Vortex Clouds (Puffs)
Authors
M. A. Zasimova
V. V. Ris
N. G. Ivanov
Publication date
01-10-2023
Publisher
Pleiades Publishing
Published in
Fluid Dynamics / Issue 5/2023
Print ISSN: 0015-4628
Electronic ISSN: 1573-8507
DOI
https://doi.org/10.1134/S0015462823601316

Other articles of this Issue 5/2023

Fluid Dynamics 5/2023 Go to the issue

Premium Partners