Langley Research Center Turbulence Modeling Resource

DNS: Flattened Speed Bump

Return to: Data from DNS - Intro Page

The data on this page were provided by G. Coleman.

This case is based on a quasi-2D version of the Boeing Gaussian Speed Bump (Case C), as described in: Balin, R. and Jansen, K. E., "Direct Numerical Simulation of a Turbulent Boundary Layer Over a Bump with Strong Pressure Gradients," Journal of Fluid Mechanics, Vol. 918, A14, 2021, https://doi.org/10.1017/jfm.2021.312. In the current Case F, however, the test wall is straight ("flattened"), while the opposite wall has a blowing/suction distribution that yields the same pressure distribution on the straight wall as if it was the quasi-2D Boeing Gaussian Speed Bump shape. This allows the investigation of curvature and pressure effects independently. The flow was computed using the incompressible Navier-Stokes equations in a pseudo-spectral code. Additional details concerning the data, code, and computational methodology can be found in:

• Spalart, P. R., Jansen, K. E., and Coleman, G. N., "Direct Numerical Simulation of Two Boundary Layers with the Same Pressure Distribution but Different Surface Curvatures," arXiv:2409.00555 [physics.flu-dyn], https://doi.org/10.48550/arXiv.2409.00555.

(See also the related 3-D experimental data and description of the original geometry in Exp: Smooth Body Separation Experiment (SBSE) - Boeing Gaussian Bump with Error Function Shoulders).

Here is an explanation of what is in the data files provided:

• README.v1 (explanation of what is in the files)

The DNS data files are given here:

• Qofx.dat (one-dimensional/streamwise (x) data in Tecplot format)
• Qofxy.plt.gz (field data in Tecplot format, gzipped 3.3 MB)

Return to: Data from DNS - Intro Page

Recent significant updates:

Privacy Act Statement

Accessibility Statement

Responsible NASA Official: Ethan Vogel
Page Curator: Clark Pederson
Last Updated: 09/24/2024