The 14th Workshop on QCD Phase Transition and Relativistic Heavy-Ion Physics (QPT 2021)

Second-order viscous hydrodynamics has been successfully applied to describe the space-time evolution of the quark-gluon plasma created in heavy-ion collisions. While hydrodynamics is a macroscopic theory, the transport coefficients and the relaxation times --- controlling the evolution of the non-equilibrium corrections --- depend on the microscopic processes, and can be derived using a 14-moment expansion formalism. The quark-gluon plasma consists of multiple components (gluons and various flavors of quarks and anti-quarks), and they convert to each other through inelastic scattering. In this talk, I will give a detailed derivation of second-order viscous hydrodynamics of multi-component reactive fluids based on the 14-moment formalism. Compared to a single-component system, the influence of multiple particle species and chemical reactions is taken into considerations. I will compare the transport coefficients of single-component and multi-component reactive systems using various types of cross-sections.