Fluid temperature T_{\rm inv} satisfying the following condition:
| T_{\rm inv} \cdot \alpha_V(T_{\rm inv}) = 1 |
where
\alpha_V | Thermal expansion coefficient |
The Fluid above Inversion Temperature T > T_{\rm inv} has negative Joule–Thomson coefficient \epsilon_{JT} <0 and hence will be cooling under expansion ( \delta P > 0).
The Fluid below Inversion Temperature T < T_{\rm inv} has positive Joule–Thomson coefficient \epsilon_{JT} >0 and hence will be warming under expansion ( \delta P > 0).
See also
Physics / Thermodynamics / Thermodynamic process / Adiabatic Process / Throttling process