Flow Characteristics Around a Body Under Turbulent Boundary Layer

2020 ◽  
Author(s):  
Young-Woo Yi ◽  
Hee-Chang Lim
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Flow Characteristics

Characterization of Visually Detected Coherent Motions in the Turbulent Boundary Layer

2001 ◽  
Author(s):  
Christopher Robin Hirschi
Keyword(s):  
Boundary Layer ◽  
Reynolds Number ◽  
Turbulent Boundary Layer ◽  
Flow Characteristics ◽  
Viscous Sublayer ◽  
Vertical Transport ◽  
Momentum Transport ◽  
Coherent Motion ◽  
The Past

Abstract Research over the past 40 years indicates that coherent motions within the turbulent boundary layer account for disproportionate contributions to momentum transport (Robinson, 1991). To better understand these motions, low-Reynolds number turbulent boundary layer experiments were conducted to investigate the instantaneous velocity and vorticity fields associated with near-wall coherent motion interactions. The present study identifies and explores the most prevalent flow characteristics associated with the vertical transport of injected passive marker from the viscous sublayer.

Study on Flow Characteristics of a Turbulent Boundary Layer and Vortex Structure of High Pressure Guide Vanes in SCO2 Turbines

2019 ◽  
Vol 28 (3) ◽  
pp. 571-584
Author(s):  
Wanlong Han ◽  
Yueming Wang ◽  
Zhenping Feng ◽  
Hongzhi Li ◽  
Mingyu Yao ◽  
...  
Keyword(s):  
Boundary Layer ◽  
High Pressure ◽  
Turbulent Boundary Layer ◽  
Vortex Structure ◽  
Flow Characteristics ◽  
Guide Vanes

scholarly journals The effect of oscillating turbulent inflow on the shape of downstream turbulence

2021 ◽  
Author(s):  
Young-Woo Yi ◽  
◽  
Bhupendra Singh Chauhan ◽  
Hee-Chang Lim ◽  
◽  
...  
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Inlet Section ◽  
Mean Flow ◽  
Turbulent Inflow ◽  
Turbulent Statistics ◽  
Large Eddy ◽  
The Mean

Large Eddy Simulations (LES) has been widely applied and used in several decades to simulate a turbulent boundary layer in the numerical domain. In this study, we aimed to make a synthetic inflow generator (SIG) yielding an appropriate property of turbulent boundary layer in the inlet section and making quick development in the downstream of a three-dimensional domain. In order to achieve turbulent boundary layer quickly in a limited domain, the oscillating term was implemented in the well-defined boundary layer, which was expected to make faster convergence in the calculation. Cholesky decomposition was also applied to possess turbulent statistics such as the randomness and correlation of turbulent flow. In a result, the oscillating inflow did not show the faster convergence, but it indicated a possibility to improve statistical quantities in the downstream. In addition, regarding the mean flow characteristics were very close to the calculation without the oscillating flow. On the other hand, the turbulent statistics were improved depending on the oscillating magnitude.

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