Numerical simulation in converging channel flow of the fluid M1 using an integral constitutive equation

1994 ◽  
Vol 52 (1) ◽  
pp. 69-89 ◽  
Author(s):  
H.J. Park ◽  
D. Kim ◽  
K.-J. Lee ◽  
E. Mitsoulis
Keyword(s):  
Numerical Simulation ◽  
Constitutive Equation ◽  
Channel Flow ◽  
Converging Channel ◽  
Integral Constitutive Equation

Direct numerical simulation of thermal channel flow for and

2021 ◽  
Vol 916 ◽  
Author(s):  
Francisco Alcántara-Ávila ◽  
Sergio Hoyas ◽  
María Jezabel Pérez-Quiles
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Channel Flow

Abstract

Direct numerical simulation of turbulent channel flow up to

2015 ◽  
Vol 774 ◽  
pp. 395-415 ◽  
Author(s):  
Myoungkyu Lee ◽  
Robert D. Moser
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Direct Numerical Simulation ◽  
Turbulent Flows ◽  
Channel Flow ◽  
Turbulent Channel Flow ◽  
Streamwise Velocity ◽  
Mean Velocity ◽  
Layer Structures ◽  
High Reynolds

A direct numerical simulation of incompressible channel flow at a friction Reynolds number ($\mathit{Re}_{{\it\tau}}$) of 5186 has been performed, and the flow exhibits a number of the characteristics of high-Reynolds-number wall-bounded turbulent flows. For example, a region where the mean velocity has a logarithmic variation is observed, with von Kármán constant ${\it\kappa}=0.384\pm 0.004$. There is also a logarithmic dependence of the variance of the spanwise velocity component, though not the streamwise component. A distinct separation of scales exists between the large outer-layer structures and small inner-layer structures. At intermediate distances from the wall, the one-dimensional spectrum of the streamwise velocity fluctuation in both the streamwise and spanwise directions exhibits $k^{-1}$ dependence over a short range in wavenumber $(k)$. Further, consistent with previous experimental observations, when these spectra are multiplied by $k$ (premultiplied spectra), they have a bimodal structure with local peaks located at wavenumbers on either side of the $k^{-1}$ range.

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