Investigating the structure of a vortex flow in the closed polygonal containers

I. Yu Podolskaya, G. V. Bakakin, I. V. Naumov

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The structure of confined vortex flow generated by a rotating lid in a closed container with polygonal cross-section geometry (eight, six and five angles) has been investigated numerically for different height/radius aspect ratios h from 3.0 to 4.5 and for Reynold numbers ranging from 1500 to 3000. The critical Reynolds numbers at which the flow becomes unsteady were determined numerically by STAR-CCM+ computational fluid dynamics software for pentagonal and hexagonal cross-section configurations. The obtained results were compared with the flow structure in the closed cylindrical container. The boundary of a nonstationarity in polygonal containers is found to shift to the region of smaller aspect ratio and smaller Reynolds numbers with a decrease in the number of angles in the cross-section of the container relative to the boundary in a cylindrical container. It is additionally established that the structure of the flow in the near-axis region remains similar to the vortex structure in the cylinder, therefore the shape of the container does not influence the near-axis region.

Original languageEnglish
Article number012002
Number of pages6
JournalJournal of Physics: Conference Series
Volume980
Issue number1
DOIs
Publication statusPublished - 19 Mar 2018
Event6th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows - Novosibirsk, Russian Federation
Duration: 21 Nov 201723 Nov 2017

Keywords

  • BREAKDOWN

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