The open source CFD toolbox
Turbulent flat plate

# Overview

The domain comprises a 2D rectangular slab as shown below:

Case description

# Mesh

Several meshes are employed to highlight the sensitivity of the computed skin friction coefficient to the near wall $$y^+$$ over the range $$0.05 < y^+ < 100$$. All meshes are generated using blockMesh and employ the same number of cells whereby the first cell height is varied by changing the expansion ratio from the wall patch.

# Boundary conditions

## Common fields

Velocity: U

Patch condition value
Inlet fixedValue 69.4 m/s in x
Walls noSlip

Pressure: p

Patch condition value
Outlet fixedValue 0 Pa (static)

Turbulence viscosity: nut

Patch condition value
Inlet calculated
Outlet calculated
Walls nutUSpaldingWallFunction

## Turbulence fields

Inlet conditions are based on an inlet turbulence intensity of 0.0039%, and turbulence viscosity ratio of 0.009.

Turbulence kinetic energy: k

Patch condition value
Inlet fixedValue based on 0.039% intensity
Walls kqRWallFunction

Turbulence specific dissipation rate: omega

Patch condition value
Inlet fixedValue based on nut/nu = 0.009
Walls omegaWallFunction

# Results

The following figures show the predicted skin friction coefficient as a function of Reynolds number, compared against the experimental data from Weighardt [95]

Skin friction: low y-plus
Skin friction: high y-plus

 Would you like to suggest an improvement to this page? Create an issue