A dual-eddy EMMS-based turbulence model for laminar–turbulent transition prediction--颗粒学报PARTICUOLOGY

Guo, S., & Wang, L. (2021). A dual-eddy EMMS-based turbulence model for laminar–turbulent transition prediction. Particuology, 58, 285-298. https://doi.org/10.1016/j.partic.2021.04.005

A dual-eddy EMMS-based turbulence model for laminar–turbulent transition prediction

Shuyu Guo ^{a b}, Limin Wang ^{a b c *}

a State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
c Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China

10.1016/j.partic.2021.04.005

Volume 58, October 2021, Pages 285-298

Received 27 January 2021, Revised 7 April 2021, Accepted 8 April 2021, Available online 4 May 2021, Version of Record 13 September 2021.

E-mail: lmwang@ipe.ac.cn

Highlights

• A meso-scale turbulence model i.e. dual-eddy EMMS-based turbulence model is proposed.

• The principle of EMMS model extended from gas–solid system to turbulence.

• The dual-eddy EMMS-based turbulence model successfully predicts turbulent transition.

• Mesoscale concept provides a new viewpoint for establishing turbulence transition models.

Abstract

Turbulence is a century-old physics problem, and the prediction of laminar–turbulent transition remains a major challenge in computational fluid dynamics (CFD). This paper proposes a new conceptual multiscale-structure flow system consisting of a nonturbulent part and two types of turbulent eddies with different properties. The stability criterion for turbulent transition flows, based on the principle of compromise-in-competition between viscosity and inertia, is used to obtain model closure. The multiscale-structure concept and stability criterion are the characteristics of the dual-eddy energy-minimization multiscale (EMMS)-based turbulence model. The solved heterogeneous structure parameters and energy dissipation rate are analyzed, which reveal the laminar–turbulent transition process. To validate the dual-eddy EMMS-based turbulence model, three benchmark problems, namely, the transitional flows over the flat plate boundary layer with zero pressure gradient, NACA0012, and Aerospatiale-A airfoils, were simulated. The simulation was performed by combining the optimized results from the proposed model with the equations of the well-known k-w shear stress transfer (SST) turbulence model. The numerical results show that the dual-eddy EMMS-based turbulence model improves the prediction in the laminar–turbulent transition process. This demonstrates the soundness of using the multiscale-structure concept in turbulent flows to establish the turbulence transition model by considering the principle of compromise-in-competition between viscosity and inertia.

Graphical abstract

Keywords

Turbulent flows; Laminar–turbulent transition; EMMS; Turbulence model; Multiscale structure

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