Joule–Thomson expansion of RN-AdS black hole immersed in perfect fluid dark matter

In this paper, we study the Joule-Thomson expansion for RN-AdS black holes immersed in perfect fluid dark matter. Firstly, negative cosmological constant could be interpreted as thermodynamic pressure and its conjugate quantity with volume gave us more physical insights into hole. We derive definitions critical behaviour of Secondly, explicit expression coefficient is obtained from basic formulas enthalpy temperature. Then, obtain isenthalpic curve $T-P$ graph demonstrate cooling-heating region by inversion curve. At last, ratio minimum temperature to curves terms charge $Q$ parameter $\lambda$.