Aviumtechnologies APM Docs
  • Introduction to APM
  • Quick start
    • Set up your licence key
  • Release notes
  • User guide
    • The configuration file
      • Calculating pressure
      • Calculating skin friction
      • Creating control surfaces
      • Creating actuator disks
    • The mesh file
      • Creating meshes
        • OpenVSP
        • SUMO
    • Preprocessor
    • Solver
      • Steady simulations
      • Unsteady simulations
      • Symmetry
      • Wake
        • Interaction with the body
        • Viscous vortex particle wake
    • Output files
  • Examples
  • Sphere
  • Ellipsoid
  • NACA4412 wing
  • NACA0015 wing
  • Caradonna-Tung rotor in hover
  • NREL Phase IV wind turbine
  • AGARD-AR-303 E6
  • Wing-tail configuration
  • Fixed-wing UAV
  • Aerosonde UAV
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  1. User guide
  2. Solver

Wake

PreviousSymmetryNextInteraction with the body

Last updated 3 years ago

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The APM Solver has several options for controlling the wake. The wake_alignement option in the .conf file controls the alignment of the wake with respect to the trailing edge.

  • By default the wake_alignement option is set to 0. The wake will be aligned with the freestream velocity vector at the trailing edge.

  • If the wake_alignement option is set to 1 the wake will be aligned with the average trailing edge bisector. The average trailing edge bisector is calculated from the normal vectors of the trailing edge elements.

  • If the wake_alignement option is set to 2 the wake will be positioned at a specific angle with respect to the x−yx-yx−yplane. The wake_angle option in the .conf file can be used to specify the angle. If you do not specify an angle a default value of 0 deg will be assumed.

Use the average trailing angle bisector option for best results.

The images below show the wake of a NACA4412 wing aligned with the freestream velocity vector and with the average trailing edge bisector.

Wake aligned with the freestream flow
Wake aligned with the average trailing edge bisector