Understanding the capability of RANS based turbulence models on fully turbulent channel flow

Yasin Kaan ILter*, Ugur Oral Ünal

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Özet

Fully turbulent channel flow is a very common and effective way to investigate the boundary layer flow over the flat plates. Mean flow characteristics of the channel flow can be predicted using steady Reynolds Averaged Navier-Stokes (RANS) simulations although the turbulent flow has an unsteady nature. The objective of the present study is to evaluate the predictive capability of the turbulence models, which are based on RANS decomposition, in channel flow involving smooth surfaces. The study covers the application of the Reynolds-stress based second-moment turbulence closure model and the most preferred linear eddy viscosity models to determine the mean flow characteristics. The turbulence properties were compared with the DNS data obtained from the open literature. Also, an iterative study was performed for the fine-tuning of the coefficients appearing in the Reynolds-stress turbulence model. A tuned version of the Reynolds-stress model for two different frictional Reynolds numbers (Ret) of 180 and 590 is presented. These studies will form a basis for further computations on the channel flow with a higher Reynolds number range and different channel sections. They will also serve as the initial steps for the future experimental and computational studies that will focus on the understanding of the flow mechanism over the dimpled surfaces at Reynolds numbers (based on half channel height and mean bulk velocity) up to 2.105

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıCFD and FSI
YayınlayanAmerican Society of Mechanical Engineers (ASME)
ISBN (Elektronik)9780791858776
DOI'lar
Yayın durumuYayınlandı - 2019
EtkinlikASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom
Süre: 9 Haz 201914 Haz 2019

Yayın serisi

AdıProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Hacim2

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???event.eventtypes.event.conference???ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
Ülke/BölgeUnited Kingdom
ŞehirGlasgow
Periyot9/06/1914/06/19

Bibliyografik not

Publisher Copyright:
Copyright © 2019 ASME

Finansman

This work was supported by the Scientific and Technological Research Council of Turkey (TÜBITAK). The authors gratefully acknowledge the close collaboration, help, and contributions provided by Prof. Mehmet Atlar of the University of Strathclyde. The computations were performed by using the ARCHIE-WeSt supercomputer (www.archie-west.ac.uk). This work was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK). The authors gratefully acknowledge the close collaboration, help, and contributions provided by Prof. Mehmet Atlar of the University of Strathclyde. The computations were performed by using the ARCHIE-WeSt supercomputer (www.archie-west.ac.uk).

FinansörlerFinansör numarası
University of Strathclyde
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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