TY - JOUR

T1 - Investigating the structure of a vortex flow in the closed polygonal containers

AU - Podolskaya, I. Yu

AU - Bakakin, G. V.

AU - Naumov, I. V.

N1 - Publisher Copyright: © Published under licence by IOP Publishing Ltd.

PY - 2018/3/19

Y1 - 2018/3/19

N2 - 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.

AB - 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.

KW - BREAKDOWN

UR - http://www.scopus.com/inward/record.url?scp=85045927425&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/980/1/012002

DO - 10.1088/1742-6596/980/1/012002

M3 - Conference article

AN - SCOPUS:85045927425

VL - 980

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012002

T2 - 6th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows

Y2 - 21 November 2017 through 23 November 2017

ER -