The Joule–Thomson and Joule–Thomson‐Like Effects of the Black Holes in a Cavity

When a black hole is enclosed in cavity asymptotically flat space, an effective volume can be introduced, and pressure further defined as its conjugate variable. By this means, extended phase space constructed cavity, which resembles that the anti-de Sitter (AdS) many aspects. However, there are still some notable dissimilarities simultaneously. In work, Joule--Thomson (JT) effect of holes, widely discussed AdS isenthalpic (constant-mass) process, shown to only have cooling region cavity. On contrary, constant-thermal-energy process (the JT-like effect), heating Altogether, different from case, no inversion temperature or curve Our work reveals subtle discrepancy between two spaces sensitive specific boundary conditions.