Spin fluids and hyperfluids

The general theory of continua with microstructure reviewed in [2] (and, in particular, the theory of gyrocontinua studied in [1] is adapted to apply to perfect spin fluids and hyperfluids [10]. Obvious changes are needed due to the prevailing interest for solids in [1] and to some extent in [2]; here, in addition, the conservative character of the continuum is exploited. Finally, the roles of metric, coframe, connection, torsion and curvature in fluids are explored.