Flow Around Thick Airfoils at Very High Reynolds Number. Stall and Dynamic Stall Applications

2019 ◽  
pp. 359-365 ◽  
Author(s):  
F. Barnaud ◽  
P. Bénard ◽  
G. Lartigue ◽  
V. Moureau ◽  
P. Deglaire
Keyword(s):  
Reynolds Number ◽  
High Reynolds Number ◽  
Dynamic Stall ◽  
High Reynolds ◽  
Very High

scholarly journals RANS study of very high Reynolds-number plane turbulent Couette flow

2020 ◽  
Vol 14 (2) ◽  
pp. 6663-6678
Author(s):  
Akshay Sherikar ◽  
P. J. Disimile
Keyword(s):  
Reynolds Number ◽  
Couette Flow ◽  
High Reynolds Number ◽  
Turbulence Models ◽  
Navier Stokes ◽  
Shear Stresses ◽  
Sensitivity Testing ◽  
Wall Functions ◽  
High Reynolds ◽  
Very High

The objective of this study is to expound on the deliverables of a steady-state RANS (Reynolds Averaged Navier Stokes) simulation in one of the simplest flows, Couette flow, at a very high Reynolds number. To that end, a process to perform better grid sensitivity testing is introduced. Three two-equation turbulence models ( , , and ) are compared against each other as well as pitted against formal literature on the subject and core flow velocities, slopes, wall-bounded velocities, shear stresses and kinetic energies are analyzed.  applied with enhanced wall functions is consistently found to be in better agreement with previous studies. Finally, plane turbulent Couette flow at  51,099, the range at which it has not been studied experimentally, numerically or analytically in former studies, is simulated. The results are found to be consistent with the trends asserted by literature and preliminary computations of this study.

Turbulent boundary layer statistics at very high Reynolds number

2015 ◽  
Vol 779 ◽  
pp. 371-389 ◽  
Author(s):  
M. Vallikivi ◽  
M. Hultmark ◽  
A. J. Smits
Keyword(s):  
Boundary Layer ◽  
Reynolds Number ◽  
High Reynolds Number ◽  
Reynolds Numbers ◽  
Working Fluid ◽  
Mean Velocity ◽  
High Reynolds Numbers ◽  
Layer Flow ◽  
High Reynolds ◽  
Very High

Measurements are presented in zero-pressure-gradient, flat-plate, turbulent boundary layers for Reynolds numbers ranging from $\mathit{Re}_{{\it\tau}}=2600$ to $\mathit{Re}_{{\it\tau}}=72\,500$ ($\mathit{Re}_{{\it\theta}}=8400{-}235\,000$). The wind tunnel facility uses pressurized air as the working fluid, and in combination with MEMS-based sensors to resolve the small scales of motion allows for a unique investigation of boundary layer flow at very high Reynolds numbers. The data include mean velocities, streamwise turbulence variances, and moments up to 10th order. The results are compared to previously reported high Reynolds number pipe flow data. For $\mathit{Re}_{{\it\tau}}\geqslant 20\,000$, both flows display a logarithmic region in the profiles of the mean velocity and all even moments, suggesting the emergence of a universal behaviour in the statistics at these high Reynolds numbers.

Turbulent boundary layer at very high Reynolds number and its relation to the initial conditions

2001 ◽  
Author(s):  
Luciano Castillo ◽  
Junghwa Seo ◽  
David Walker ◽  
Gunnar Johansson ◽  
Horia Hangan ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Reynolds Number ◽  
Turbulent Boundary Layer ◽  
High Reynolds Number ◽  
Initial Conditions ◽  
High Reynolds ◽  
Very High

scholarly journals Persistence of the laminar regime in a flat plate boundary layer at very high Reynolds number

2006 ◽  
Vol 10 (2) ◽  
pp. 63-96 ◽  
Author(s):  
Jovan Jovanovic ◽  
Bettina Frohnapfel ◽  
Emir Skaljic ◽  
Milenko Jovanovic
Keyword(s):  
Boundary Layer ◽  
Reynolds Number ◽  
Flat Plate ◽  
High Reynolds Number ◽  
Plate Boundary ◽  
Laminar Regime ◽  
High Reynolds ◽  
Very High ◽  
Flat Plate Boundary Layer

A Spectrum of Turbulence at Very High Reynolds Number

Nature ◽  
1959 ◽  
Vol 184 (4689) ◽  
pp. 808-810 ◽  
Author(s):  
H. L. GRANT ◽  
A. MOILLIET ◽  
R. W. STEWART
Keyword(s):  
Reynolds Number ◽  
High Reynolds Number ◽  
High Reynolds ◽  
Very High
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