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http://hdl.handle.net/10397/106544
Title: | Development of a k–ω–ϕ–α turbulence model based on elliptic blending and applications for near-wall and separated flows | Authors: | Yang, XL Yang, L Huang, ZW Liu, Y |
Issue Date: | 2017 | Source: | Journal of turbulence, 2017, v. 18, no. 1, p. 36-60 | Abstract: | A new turbulence model based on elliptic blending, termed as k − ω − ϕ − α model, is developed. This model uses the latest version of Wilcox's k − ω model in near-wall region and changes gradually to the BL−v2/K model elsewhere. The capabilities of the present model are evaluated on near-wall and separation flows, i.e. the 2D fully developed channel flow, the asymmetric plane diffuser flow and the 2D backward-facing step flow, in comparison with available direct numerical simulation (DNS) and experimental data. The computational results are compared also to those from the popular BL−v2/K model and the original BL−v2/K model, and the present model is more stable than the BL−v2/K model in complex flows. The present model provides indistinguishable velocity profiles and improved turbulent kinetic energy profiles compared to the BL−v2/K model in the channel flow, while in the separation flows tested herein, the present model can obtain comparable results with the BL−v2/K model, and both of them show improvements to some extent compared with the BL−v2/K model. | Keywords: | Elliptic blending k–ω–ϕ–α model Near-wall flow Separated flow Turbulence model |
Publisher: | Taylor & Francis | Journal: | Journal of turbulence | EISSN: | 1468-5248 | DOI: | 10.1080/14685248.2016.1244336 | Rights: | ©2016 Informa UK Limited, trading as Taylor & Francis Group This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Turbulence on 18 Oct 2016 (published online), available at http://www.tandfonline.com/10.1080/14685248.2016.1244336. |
Appears in Collections: | Journal/Magazine Article |
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Liu_Development_Turbulence_Model.pdf | Pre-Published version | 1.05 MB | Adobe PDF | View/Open |
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