DNS: Turbulent channel flow

A series of direct numerical simulations (DNSs) have been performed in a turbulent channel flow with / without passive scalar transport over a range of Reynolds and Prandtl numbers. Particular attention is given to the effects of Reynolds and Prandtl numbers. The present flow is a fully developed turbulent channel flow, which is driven by a streamwise mean pressure gradient. The flow is heated with a constant time-averaged heat flux (qw) from both walls. The periodic boundary condition is used in the streamwise (x) and spanwise (z) directions. The no-slip condition is imposed at both the top (y=2h) and bottom (y=0) walls. More details are given in the below references.

Statistics Downloads

Basic statistics such as mean quantities and one-point turbulence statistics

Ret Velocity field Scalar Field
Pr=0.71 Pr=0.025
180 DOWNLOADch180.dat DOWNLOADch180pr071.dat DOWNLOADch180pr0025.dat
395 DOWNLOADch395.dat DOWNLOADch395pr071.dat DOWNLOADch395pr0025.dat
640 DOWNLOADch640.dat DOWNLOADch640pr071.dat DOWNLOADch640pr0025.dat
1020 DOWNLOADch1020.dat DOWNLOADch1020pr071.dat DOWNLOADch1020pr0025.dat
  • Note that Reτ and Pr denote the friction Reynolds number and the molecular Prandtl number, respectively.

Turbulent eddy viscosity (νt) and diffusivity (at), and turbulent Prandtl number (Prt = νt / at)

Ret νt , at , Prt
Pr=0.71 Pr=0.025
180 DOWNLOADnut_at_Prt_180pr071.dat DOWNLOADnut_at_Prt_180pr0025.dat
395 DOWNLOADnut_at_Prt_395pr071.dat DOWNLOADnut_at_Prt_395pr0025.dat
640 DOWNLOADnut_at_Prt_640pr071.dat DOWNLOADnut_at_Prt_640pr0025.dat
1020 DOWNLOADnut_at_Prt_1020pr071.dat DOWNLOADnut_at_Prt_1020pr0025.dat

References

  • H. Abe, H. Kawamura, and Y. Matsuo, “Direct numerical simulation of a fully developed turbulent channel flow with respect to Reynolds number dependence,“ Trans. ASME J. Fluids Eng., Vol. 123, pp. 382-393 (2001). DOI: https://doi.org/10.1115/1.1366680
  • H. Abe, H. Kawamura, and Y. Matsuo, "Surface heat-flux fluctuations in a turbulent channel flow up to Re_tau=1020 with Pr=0.025 and 0.71," Int. J. Heat and Fluid Flow, Vol. 25, pp. 404-419 (2004). DOI: https://doi.org/10.1016/j.ijheatfluidflow.2004.02.010
  • H. Abe, R.A.Antonia and H. Kawamura, " Correlation between small-scale velocity and scalar fluctuations in a turbulent channel flow," J. Fluid Mech., Vol. 627, pp. 1-32 (2009). DOI: https://doi.org/10.1017/S0022112008005569
  • H. Abe and R.A. Antonia, “ Mean temperature calculations in a turbulent channel flow for air and mercury,” Int. J. Heat Mass Transfer, Vol. 132, pp. 1152-1165 (2019). DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2018.11.100
  • In the DNSs, statistics have been obtained with maximal caution on the accuracy and convergence. Users however should remind that their accuracy is within a certain limit imposed by the grid resolution and numerical scheme employed. The database may be updated without any notification.
  • When publishing the results using the downloaded data, users should clarify the source of the data, such as by quoting the above references.
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