An NPARC Turbulence Model with Wall Functions PDF Download
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Author: Gang Zhu
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 9
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Author: Gang Zhu
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 9
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Book Description
Author: J. Zhu
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 14
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722100599
Category :
Languages : en
Pages : 38
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Book Description
This is a user's manual of the CMOTT turbulence module, version 2.0, developed for the NPARC code. The module is written in a self-contained manner so that the user can use any turbulence model in the module without concern as to how it is implemented and solved. Three two-equation turbulence models have been built into the module: Chien, Shih-Lumley and CMOTT models, and all of them have both the low Reynolds number and wall function options. Unlike Chien's model, both the Shih-Lumley and CMOTT models do not involve the dimensionless wall distance y(sup +) in the low Reynolds number approach, an advantage for separated flow calculations. The Van Driest transformation is used so that the wall functions can be applied to both incompressible and compressible flows. The manual gives the details of the turbulence models used and their numerical implementation. It also gives two application examples, one for subsonic and the other for transonic flow, for demonstration. The module can be easily linked to the NPARC code for practical applications. Zhu, J. and Shih, T.-H. Glenn Research Center NCC3-520; RTOP 522-31-23...
Author: J. Zhu
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 40
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Author: Manuel D. Salas
Publisher: Springer Science & Business Media
ISBN: 9401147248
Category : Science
Languages : en
Pages : 385
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Book Description
Turbulence modeling both addresses a fundamental problem in physics, 'the last great unsolved problem of classical physics,' and has far-reaching importance in the solution of difficult practical problems from aeronautical engineering to dynamic meteorology. However, the growth of supercom puter facilities has recently caused an apparent shift in the focus of tur bulence research from modeling to direct numerical simulation (DNS) and large eddy simulation (LES). This shift in emphasis comes at a time when claims are being made in the world around us that scientific analysis itself will shortly be transformed or replaced by a more powerful 'paradigm' based on massive computations and sophisticated visualization. Although this viewpoint has not lacked ar ticulate and influential advocates, these claims can at best only be judged premature. After all, as one computational researcher lamented, 'the com puter only does what I tell it to do, and not what I want it to do. ' In turbulence research, the initial speculation that computational meth ods would replace not only model-based computations but even experimen tal measurements, have not come close to fulfillment. It is becoming clear that computational methods and model development are equal partners in turbulence research: DNS and LES remain valuable tools for suggesting and validating models, while turbulence models continue to be the preferred tool for practical computations. We believed that a symposium which would reaffirm the practical and scientific importance of turbulence modeling was both necessary and timely.
Author: T. H. Shih
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 18
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Author: Douglas L. Brown
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
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Author: Mohamed Abdel Meguid Elhadidy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 118
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