Quasistatic equilibrium

Quasistatic equilibrium

Quasistatic equilibrium is the quasi-balanced state of a thermodynamic system near to thermodynamic equilibrium in some sense or degree. A process is called quasi-static when it follows a succession of equilibrium states; the surroundings may be irreversibly altered during the process so that after a return path, the system ends up in a final state which differs from its initial state.

The quasistatic equilibrium model facilitates or justifies the use of Gibbsian thermodynamic applications, i.e. equations of state, to systems characterized by slow change if measured on the adjunct time scale. In short, the quasistatic equilibrium model approximates change as a series of equilibrium processes.

In a quasistatic process, or equilibrium process, a sufficiently slow transition of a thermodynamic system from one equilibrium state to another occurs such that at every moment in time the state of the system is close to an equilibrium state. During a quasistatic process, the system reaches equilibrium much faster, almost instantaneously, than its physical parameters vary. A quasistatic process is not necessarily a reversible one.

ee also

* Adiabatic process
* Berry phase
* Quasistatic process

References

* Perrot, P. (1998). "A to Z of Thermodynamics" (dictionary). New York: Oxford University Press.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Quasistatic — can refer to: * Quasistatic process * Quasistatic equilibrium * Quasistatic loading * Quasistatic dynamics …   Wikipedia

  • Equilibrium — is the condition of a system in which competing influences are balanced and it may refer to:cienceBiology* Equilibrioception, the sense of balance present in humans and animals * Homeostasis, the ability of an open system, especially living… …   Wikipedia

  • Quasistatic process — In thermodynamics, a quasistatic process is a thermodynamic process that happens infinitely slowly. In practice, such processes can be approximated by performing them very slowly .A quasistatic process often ensures that the system will go… …   Wikipedia

  • quasistatic — adjective a) Happening so slowly as to appear to be static b) In a state of dynamic equilibrium …   Wiktionary

  • quasistatic — /kwaziˈstætɪk/ (say kwahzee statik) adjective of or relating to a thermodynamic process in which the system remains infinitesimally close to equilibrium throughout …  

  • Non-equilibrium thermodynamics — Thermodynamics …   Wikipedia

  • Polytropic process — A polytropic process is a thermodynamic process that obeys the relation::P V^n = C,where P is pressure, V is volume, n is any real number (the polytropic index), and C is a constant. This equation can be used to accurately characterize processes… …   Wikipedia

  • Adiabatic process — This article covers adiabatic processes in thermodynamics. For adiabatic processes in quantum mechanics, see adiabatic process (quantum mechanics). For atmospheric adiabatic processes, see lapse rate. In thermodynamics, an adiabatic process or an …   Wikipedia

  • Bending — For other uses, see Bending (disambiguation). Flexure redirects here. For joints that bend, see living hinge. For bearings that operate by bending, see flexure bearing. Continuum mechanics …   Wikipedia

  • Entropy — This article is about entropy in thermodynamics. For entropy in information theory, see Entropy (information theory). For a comparison of entropy in information theory with entropy in thermodynamics, see Entropy in thermodynamics and information… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”