com1DFA.particleTools.getTangenVectors

getTangenVectors(nx, ny, nz, ux, uy, uz)[source]

Compute the tangent vector to the surface

If possible, e1 is in the velocity direction, if not possible, use the tangent vector in x direction for e1 (not that any other u vector could be provided, it does not need to be the velocity vector, it only needs to be in the tangent plane)

Parameters

  • nx (float) – x component of the normal vector

  • ny (float) – y component of the normal vector

  • nz (float) – z component of the normal vector

  • ux (float) – x component of the velocity vector

  • uy (float) – y component of the velocity vector

  • uz (float) – z component of the velocity vector

Returns

  • e1x (float) – x component of the first tangent vector

  • e1y (float) – y component of the first tangent vector

  • e1z (float) – z component of the first tangent vector

  • e2x (float) – x component of the second tangent vector

  • e2y (float) – y component of the second tangent vector

  • e2z (float) – z component of the second tangent vector