Relativistic spin hydrodynamics

In recent years, due to the discoveries of hyperon spin polarization and vector meson alignment in relativistic heavy-ion collision experiments, transports quark-gluon matter has received intensive studies. The hydrodynamics is one important theoretical frameworks describe transports, which encodes degree freedom into a hydrodynamic theory. have conservation equations for energy-momentum tensor, currents total angular momentum. this article, we give an overview progresses hydrodynamics. We focus on following topics: 1) derivation equations, including phenomenological approach, effective theory method, kinetic 2) Some special properties hydrodynamics, especially asymmetric tensor pseudogauge transformation, 3) analytical solutions systems under Bjorken Gubser expansion.