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

Steady simulations

PreviousSolverNextUnsteady simulations

Last updated 3 years ago

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For steady simulations, the APM Solver assumes that the wake is a flat surface that extends to infinity. The following options in the .conf file are changed:

  • dt- the timestep size in seconds

  • N_timesteps - the number of timesteps

The dt option must be such as to allow the wake to extend at least 100 chord lengths downstream in direction of the flow. If the airspeed is norm_V_ref=10 m/s and the c_ref=1 m, dt should be approximately 1000 s. In addition, N_timesteps should be set to 1.

The values for airspeed and chord are arbitrary and are used for illustrative purposes.

Steady simulation of a NACA4412 wing