A Nonlinear k - Turbulence Model Applicable to High Pressure Gradient and Large Curvature Flow

Xiyao Gu, Junlian Yin, Jintao Liu and Yulin Wu

Mathematical Problems in Engineering, 2014, vol. 2014, 1-9

Abstract:

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 - ε turbulence model is proposed, which is modified from the RNG k - ε turbulence model and Wilcox's k - ω turbulence model. The Reynolds stresses are solved by nonlinear methods. The nonlinear k - ε turbulence model can calculate the near wall region without the use of wall functions. The improved nonlinear k - ε turbulence model is used to simulate the flow field in a curved rectangular duct. The results based on the improved nonlinear k - ε turbulence model agree well with the experimental results. The calculation results prove that the nonlinear k - ε 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.

Date: 2014
References: Add references at CitEc
Citations:

Downloads: (external link)
http://downloads.hindawi.com/journals/MPE/2014/405202.pdf (application/pdf)
http://downloads.hindawi.com/journals/MPE/2014/405202.xml (text/xml)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:405202

DOI: 10.1155/2014/405202

Access Statistics for this article

More articles in Mathematical Problems in Engineering from Hindawi
Bibliographic data for series maintained by Mohamed Abdelhakeem ().