A nonlinear \(k\)-\(\mathbf{\varepsilon}\) turbulence model applicable to high pressure gradient and large curvature flow
type: Item
instance of: scholarly article
title: A nonlinear \(k\)-\(\mathbf{\varepsilon}\) turbulence model applicable to high pressure gradient and large curvature flow
zbMATH Open document ID: 1407.76040
DOI: 10.1155/2014/405202
author: Xiyao Gu
author: Jintao Liu
author: Yulin Wu
author: JunLian Yin
published in: Mathematical Problems in Engineering
publication date: 2019-02-08T00:00:00Z
review text: Summary: Most of the RANS turbulence models solve the Reynolds stress by linear hypothesis with isotropic model. They can not capture all kinds of vortexes in the turbomachineries. In this paper, an improved nonlinear \(k\)-\(\epsilon\) turbulence model is proposed, which is modified from the RNG \(k\)-\(\epsilon\) turbulence model and Wilcox's \(k\)-\(\omega\) turbulence model. The Reynolds stresses are solved by nonlinear methods. The nonlinear \(k\)-\(\epsilon\) turbulence model can calculate the near wall region without the use of wall functions. The improved nonlinear \(k\)-\(\epsilon\) turbulence model is used to simulate the flow field in a curved rectangular duct. The results based on the improved nonlinear \(k\)-\(\epsilon\) turbulence model agree well with the experimental results. The calculation results prove that the nonlinear \(k\)-\(\epsilon\) turbulence model is available for high pressure gradient flows and large curvature flows, and it can be used to capture complex vortexes in a turbomachinery.
Mathematics Subject Classification ID: 76F60
zbMATH DE Number: 7016357
Wikidata QID: Q59066799
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.1155/2014/405202
OpenAlex ID: W2084669415
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description: scientific article; zbMATH DE number 7016357