A new physics-basedγ–kLtransition model

Juntasaro, Ekachai; Ngiamsoongnirn, Kiattisak

doi:10.1080/10618562.2014.921681

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Following Juntasaro and Ngiamsoongnirn [31], the definition of an intermittency factor  for modelling purpose is given as…”

Section: Derivation Of a Transport Equation For mentioning

confidence: 99%

“…where   . Following Juntasaro and Ngiamsoongnirn [31], the shear-sheltering function SS f is needed to account for the shear-sheltering effect in order to damp or promote the influence of bypass transition mechanism by controlling the production term obtained from the turbulent kinetic energy, i.e. k P , which is one of the main energy sources to promote bypass transition mechanism, so that the   equation finally becomes…”

Section: Derivation Of a Transport Equation For mentioning

confidence: 99%

“…where the function (12) in which case SS C is the model constant and its optimum value was found by Juntasaro and Ngiamsoongnirn [31] When the   equation in Eq. (11) was used to simulate the flow with non-zero pressure gradient, i.e.…”

Section: Derivation Of a Transport Equation For mentioning

confidence: 99%

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A Gamma-kL Transition Model for Transitional Flow with Pressure Gradient Effects

Juntasaro¹,

Narejo²

2017

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A new and complete version of the   L k transition model has been continually developed and proposed in the present paper. This version of the   L k transition model can predict the effects of pressure gradient on the mean flow. The   L k transition model is validated with the ERCOFTAC T3-and T3C-series experimental data of Coupland [1]. The validation shows that the computed results of the   L k transition model are in good agreement with the experimental data. The performance of the   L k transition model is assessed in comparison with those of the L k transition model of Walters and Cokljat [2], the    Re transition model of Langtry and Menter [3], and the  transition model of Ge et al [4] in case of the transitional flow through the compressor blade passage of Zaki et al [5]. It is found that the proposed   L k transition model is the only transition model that can consistently capture the separation bubble on the compressor blade.

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“…Following Juntasaro and Ngiamsoongnirn [31], the definition of an intermittency factor  for modelling purpose is given as…”

Section: Derivation Of a Transport Equation For mentioning

confidence: 99%

Section: Derivation Of a Transport Equation For mentioning

confidence: 99%

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A Gamma-kL Transition Model for Transitional Flow with Pressure Gradient Effects

Juntasaro¹,

Narejo²

2017

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“…From the literature review in Fu and Wang [23], Durbin [24,25] and Dick and Kubacki [26], transition models can be categorized into three classes: two-equation, one-equation and algebraic (zero-equation) models. For two-equation transition models, Langtry and Menter [27] proposed the γ − Re θ transition model, where γ is the intermittency factor and Re θ is the momentum-thickness Reynolds number, while Juntasaro and Ngiamsoongnirn [28] developed the γ − k L transition model, where k L is the kinetic energy of laminar fluctuations. Juntasaro and Narejo [29] further improved the γ − k L transition model to account for pressure gradient effects.…”

Section: Introductionmentioning

confidence: 99%

Development of an Analytical Wall Function for Bypass Transition

Juntasaro

Ngiamsoongnirn

Thawornsathit

et al. 2021

Fluids

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The objective of the present work is to propose an extended analytical wall function that is capable of predicting the bypass transition from laminar to turbulent flow. The algebraic γ transition model, the k−ω turbulence model and the analytical wall function are integrated together in this work to detect the transition onset and start the transition process. The present analytical wall function is validated with the experimental data, the Blasius solution and the law of the wall. With this analytical wall function, the transition onset in the skin friction coefficient is detected and the growth rate of transition is properly generated. The predicted mean velocity profiles are found to be in good agreement with the Blasius solution in the laminar flow, the experimental data in the transition zone and the law of the wall in the fully turbulent flow.

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Introduction

Juntasaro

2022

Intermittency Equation for Transitional Flow

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A new physics-basedγ–k_Ltransition model

Cited by 8 publications

References 19 publications

A Gamma-kL Transition Model for Transitional Flow with Pressure Gradient Effects

A Gamma-kL Transition Model for Transitional Flow with Pressure Gradient Effects

Development of an Analytical Wall Function for Bypass Transition

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