  We introduce a new technique for constructing three-dimensional (3D) models
of incompressible Riemann S-type ellipsoids and compressible triaxial
configurations that share the same velocity field as that of
  Riemann S-type ellipsoids. Our incompressible models are exact steady-state
configurations; our compressible models represent approximate steady-state
equilibrium configurations. Models built from this method can be used to study
a variety of relevant astrophysical and geophysical problems.
