A state of a thermodynamic system which is in thermal, mechanical, and chemical equilibrium.
Specifically it is achieved at:
Maximum Entropy | Minimum Helmholtz free energy | Minimum Gibbs Free Energy |
---|---|---|
for isolated system | for a system with | for a system with |
Particularly in Fluid Dynamics it means that:
| The Gibbs free energy is at minimum | |
| the fluid temperature is constant at any moment of time and spatial location of a fluid flow | |
| the fluid pressure is constant at any moment of time and spatial location of a fluid flow | |
| fluid density is a function of pressure and temperature only | |
| fluid viscosity is a function of pressure and temperature only | |
| fluid thermal conductivity is a function of pressure and temperature only | |
| fluid isobaric specific heat capacity is a function of pressure and temperature only | |
| fluid Joule–Thomson coefficient is a function of pressure and temperature only |
Natural Science / Physics / Thermodynamics / Thermodynamic system
[ Vapour Liquid Equilibrium (VLE) ]