Abstract
New direct numerical simulation data of a fully-developed axially rotating pipe at Re = 5300 and Re = 19, 000 is used to examine the performance of the second-moment closure elliptic blending Reynolds stress model for a range of rotation rates from N=0 to N=3. In agreement with previous studies (using alternative second-moment closure models), the turbulence suppression observed by the DNS is over-predicted. This over-prediction is greatest at Re = 5, 300 and most noticeable in the poor prediction of the u′ w′ turbulent shear-stress component. At N=3 the flow is completely relaminarized in contrast to the DNS that is only partly relaminarized. The accuracy of the second-moment closure model is superior to the two-equation k − ω SST model which predicts pure solid-body rotation, however, both are equally poor at the highest rotation rates. The accuracy of each model is also assessed for the initial portion of a rotating pipe where in contrast to the fully-developed rotating pipe flow the turbulent suppression is under-predicted compared to the DNS. It is clear that greater work is required to understand the root cause of the poor prediction by these second-moment closure models and further DNS and experimental work is underway to assist this effort.
Original language | English |
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Title of host publication | AIAA Aviation 2019 Forum |
Pages | 1-12 |
Number of pages | 12 |
DOIs | |
State | Published - 2019 |
Event | AIAA Aviation 2019 Forum - Dallas, United States Duration: Jun 17 2019 → Jun 21 2019 |
Publication series
Name | AIAA Aviation 2019 Forum |
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Conference
Conference | AIAA Aviation 2019 Forum |
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Country/Territory | United States |
City | Dallas |
Period | 6/17/19 → 6/21/19 |
Bibliographical note
Publisher Copyright:© 2019 American Institute of Aeronautics and Astronautics. All rights reserved.
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Aerospace Engineering