Rotating and swirling turbulence comprises an important class of flows, not only due to the complex physics that occur, but also due to their relevance to many engineering applications, such as combustion, cyclone separation, mixing, etc. In these types of flows, rotation strongly affects the characteristics and structure of turbulence. However, the underlying turbulent flow phenomena are complex and currently not well understood. The axially rotating pipe is an exemplary prototypical model problem that exhibits these complex turbulent flow physics. By examining turbulent statistics, the physical mechanisms responsible for turbulence suppression are investigated. Direct numerical simulations are conducted at a bulk Reynolds number up to ReD = 19,000 with rotation numbers ranging from N = 0 to 3. Within the chosen range of Reynolds numbers, some Reynolds number dependence on the results was observed. Turbulent kinetic energy budgets and Reynolds stresses were computed for these flows to quantify the effects of rotation on the turbulent flow. It is found that rotation causes a reduction in production near the wall and an increase in dissipation in inner-scaled dissipation. Additionally, a small region of increased turbulent production was found near the center of the pipe flow.
|Title of host publication||AIAA Aviation 2019 Forum|
|Number of pages||19|
|State||Published - 2019|
|Event||AIAA Aviation 2019 Forum - Dallas, United States|
Duration: Jun 17 2019 → Jun 21 2019
|Name||AIAA Aviation 2019 Forum|
|Conference||AIAA Aviation 2019 Forum|
|Period||6/17/19 → 6/21/19|
Bibliographical noteFunding Information:
This work was supported by funding from the National Science Foundation under award CBET-1706346 with Dr. R. Joslin as Program Manager.
This research is part of the Blue Waters sustained-petascale computing project, which is supported by the National Science Foundation (awards OCI-0725070 and ACI-1238993) and the state of Illinois. Blue Waters is a joint effort of the University of Illinois at Urbana-Champaign and its National Center for Supercomputing Applications.
This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number ACI-1548562. Research was conducted using the Stampede2 and Comet HPC systems through allocation TG-CTS180008.
© 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Aerospace Engineering