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

Symmetry

PreviousUnsteady simulationsNextWake

Last updated 2 years ago

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The APM solver supports symmetry solutions across the x-z plane. When using the symmetry option the solver calculates the influence coefficients 2x faster and requires 2x less memory. To enable the symmetry option, set the symmetry option to 1 in the .conf file. Note that any motion that you prescribe (if performing an unsteady simulation) must honour the x-z symmetry requirements. This means no velocity components in the y-direction or non-zero sideslip angle! The image below shows the comparison of the wake between symmetric and non-symmetric solutions.

Symmetric and non-symmetric (not assuming) symmetry of a fixed-wing UAV.