DOI: 10.1615/THMT-18
ISBN Print: 978-1-56700-468-7
ISBN Online: 978-1-56700-467-0
ISSN Print: 2377-2816
DNS study of turbulent flow in a circular pipe subjected to radial rotation
Краткое описание
The effect of Coriolis force on turbulent flow confined within a circular pipe subjected to radial system rotation has been studied using direct numerical simulation (DNS). In order to study the rotating effects, a wide range of rotation numbers have been tested. In response to the system rotation imposed, large-scale secondary flows appear in the form of axial counter-rotating vortices, which have a significant impact on the coherent structures and dynamics of the flow field. A quasi Taylor-Proudman region is observed at moderate rotation numbers, where the mean axial velocity is invariant along the rotating axis. However, full laminarization occurs at high rotation numbers. The characteristics of the flow field are investigated in both physical and spectral spaces, which include the analyses of the first- and second-order statistical moments, two point auto-correlation coefficients, spectra of velocity fluctuations, and budget balance of the transport equation of Reynolds stresses.