Predictions of channel and boundary-layer flows with a low-Reynolds-number two-equation model of turbulence

Chien, Kuei‐Yuan

doi:10.2514/6.1980-134

Cited by 74 publications

(81 citation statements)

References 11 publications

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“…In this study a VLES approach based on two different RANS models is used: the k − ε VLES model based on the Chien k − ε model [3] and the elliptic-relaxation eddy-viscosity ζ − f VLES model [9]. The ζ − f RANS model developed by Hanjalic et al [9] uses a transport equation for the velocity scale ratio ζ = v 2 /k and an equation for the so-called elliptic relaxation function f , in addition to the equations for the turbulent kinetic energy k and its dissipations rate ε:…”

Section: Compatibility With Rans Modelsmentioning

confidence: 99%

Investigation of the Flow Over an Oscillating Cylinder With a Very Large Eddy Simulation Model

Kondratyuk¹,

Schäfer²,

Ali³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. The focus of this study is the numerical simulation of the forced oscillation of a circular cylinder with a Very Large Eddy Simulation model (VLES). Five different oscillating frequencies are considered to cover the so-called jump, where abrupt changes in drag and lift coefficients are observed. The results of the simulations are compared to available experimental data and numerical results from other studies. 7674

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Section: Compatibility With Rans Modelsmentioning

confidence: 99%

Investigation of the Flow Over an Oscillating Cylinder With a Very Large Eddy Simulation Model

Kondratyuk¹,

Schäfer²,

Ali³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…where k is the turbulent kinetic energy, ε is the dissipation rate and y is the closest distance to the wall [8]. Clearly enough, for computations of k and ε the above PDE system is to be complemented by two additional mutually coupled convection-diffusionreaction equations [25].…”

Section: Integration Of Pbe Into Cfdmentioning

confidence: 99%

Numerical aspects and implementation of population balance equations coupled with turbulent fluid dynamics

Bayraktar

Mierka

Platte

et al. 2011

Computers & Chemical Engineering

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“…Turbulence models used in the simulations of current study are Baldwin-Lomax [1] and Chien k-ε [9] turbulence models, which have been utilized with the following twostep strategy in simulations: 1. First, from the initial conditions defining supersonic nozzle jet with pressures and velocities at nozzle exit and quiet space with ambient conditions, BaldwinLomax turbulence model is used to detect large pressure gradients in plane jet flowfield, which identifies the location of the shock waves in the under-expended jet flow.…”

Section: Introductionmentioning

confidence: 99%

Passive Control of Supersonic Rectangular Jets through Boundary Layer Swirl

Han

Taghavi

Farokhi

2013

Int. J. Turbo Jet-Engines

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Mixing characteristics of under-expanded supersonic jets emerging from plane and notched rectangular nozzles are computationally studied using nozzle exit boundary layer swirl as a mean of passive flow control. The coupling of the rectangular jet instability modes, such as flapping, and the swirl is investigated. A threedimensional unsteady Reynolds-Averaged Navier-Stokes (RANS) code with shock adaptive grids is utilized. For plane rectangular nozzle with boundary layer swirl, the flapping and spanwise oscillations are captured in the jet's small and large dimensions at twice the frequencies of the nozzles without swirl. A symmetrical oscillatory mode is also observed in the jet with double the frequency of spanwise oscillation mode. For the notched rectangular nozzle with boundary layer swirl, the flapping oscillation in the small jet dimension and the spanwise oscillation in the large jet dimension are observed at the same frequency as those without boundary layer swirl. The mass flow rates in jets at 11 and 8 nozzle heights downstream of the nozzles increased by nearly 25% and 41% for the plane and notched rectangular nozzles respectively, due to swirl. The axial gross thrust penalty due to induced swirl was 5.1% for the plane and 4.9% for the notched rectangular nozzle.

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Predictions of channel and boundary-layer flows with a low-Reynolds-number two-equation model of turbulence

Cited by 74 publications

References 11 publications

Investigation of the Flow Over an Oscillating Cylinder With a Very Large Eddy Simulation Model

Investigation of the Flow Over an Oscillating Cylinder With a Very Large Eddy Simulation Model

Numerical aspects and implementation of population balance equations coupled with turbulent fluid dynamics

Passive Control of Supersonic Rectangular Jets through Boundary Layer Swirl

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