Backward facing step

Overview

Case description

Mesh

Mesh
Close-up around the step

Boundary conditions

  • \( U \) 44.2 m/s
  • \( h \) 1.27 cm

Common fields

Velocity: U

Patch condition value
Inlet fixedValue 44.2 m/s in x
Outlet zeroGradient
Walls noSlip

Pressure: p

Patch condition value
Inlet zeroGradient
Outlet fixedValue 0 Pa (static)
Walls zeroGradient

Turbulence fields

Turbulence viscosity: nut

Patch condition value
Inlet calculated
Outlet calculated
Walls nutUSpaldingWallFunction

kOmega SST

Turbulence kinetic energy: k

Patch condition value
Inlet fixedValue based on 0.061% intensity
Outlet zeroGradient
Walls kqRWallFunction

Turbulence specific dissipation rate: omega

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

Results

Predictions are comapared against the measurements by Driver and Seegmiller [15] below

Skin friction
Pressure coefficient - lower
Streamwise velocity
Shear stress
Streamwise velocity
Shear stress

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