Classical fluids

Classical fluids

Classical fluids[1] are systems of particles which retain a definite volume, and are at sufficiently high temperatures (compared to their Fermi Energy) that quantum effects can be neglected. A system of hard spheres, interacting only by hard collisions (e.g., billiards, marbles), is a model classical fluid. Such a system is well described by the Percus-Yevik equation. Common liquids, e.g., liquid air, gasoline etc., are essentially mixtures of classical fluids. Electrolytes, molten salts, salts dissolved in water, are classical charged fluids. A classical fluid when cooled undergoes a freezing transition. On heating it undergoes an evaporation transition and becomes a classical gas that obeys Boltzmann statistics.

A system of charged classical particles moving in a uniform positive neutralizing background is known as a one-component plasma (OCP). This is well described by the Hyper-netted chain equation (see CHNC). An essentially very accurate way of determining the properties of classical fluids is provided by the method of molecular dynamics. An electron gas confined in a metal is NOT a classical fluid, whereas a very high-temperature plasma of electrons could behave as a classical fluid. Such non-classical Fermi systems, i.e., quantum fluids, can be studied using quantum Monte Carlo methods, Feynman path integral equation methods, and approximately via CHNC integral-equation methods.


  1. ^ R. Balescu, Equilibrium and Nonequilibrium Statistical Mechanics, (John Wiley, 1975)

See also

Fermi liquid

Many-body theory

Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Classical-map Hyper-Netted-Chain — (CHNC) technique is a method in many body theoretical physics for interacting uniform electron liquids in two and three dimensions, and to interacting hydrogen plasmas. The method extends the famous hyper netted chainmethod (HNC) introduced by… …   Wikipedia

  • Classical-map hypernetted-chain method — For the Canadian radio station, see CHNC FM . The classical map hypernetted chain method (CHNC method) is a method used in many body theoretical physics for interacting uniform electron liquids in two and three dimensions, and for interacting… …   Wikipedia

  • Classical mechanics — This article is about the physics sub field. For the book written by Herbert Goldstein and others, see Classical Mechanics (book). Classical mechanics …   Wikipedia

  • Leiden Classical — Платформа BOINC Объём загружаемого ПО 1,5 МБ Объём загружаемых данных задания 1,5 КБ Объём отправляемых данных задания 0,8 8 КБ Объём места на диске 3 МБ Используемый объём памяти 2 4 МБ Графический интерфейс есть Среднее время расчёта задания …   Википедия

  • Scale invariance — In physics and mathematics, scale invariance is a feature of objects or laws that do not change if length scales (or energy scales) are multiplied by a common factor. The technical term for this transformation is a dilatation (also known as… …   Wikipedia

  • Chandre Dharma-wardana — is a Sri Lankan born academic and scientist. A former President of Vidyodaya Campus (now the University of Sri Jayewardenepura), he is currently a Professor of Theoretical Physics at the Université de Montréal. Contents 1 Education 2 Academic… …   Wikipedia

  • Dichtefunktionaltheorie (Statistische Physik) — Die Dichtefunktionaltheorie ist in der statistischen Physik eine Methode, das Verhalten eines Vielteilchensystems (etwa eines Gases in einem Behälter) zu beschreiben. Dazu liefert sie für gegebene Parameter (u. a. Temperatur und… …   Deutsch Wikipedia

  • Fermi liquid — is a generic term for a quantum mechanical liquid of fermions that arises under certain physical conditions when the temperature is sufficiently low. The interaction between the particles of the many body system does not need to be small (see e.g …   Wikipedia

  • Loup Verlet — (1931 ) (pronounced: loo vuhr LEH) is a French physicist who pioneered the computer simulation of molecular dynamics models. In a famous 1967 paper he developed what is now known as Verlet integration (a method for the numerical integration of… …   Wikipedia

  • Ornstein–Zernike equation — In statistical mechanics the Ornstein–Zernike equation (named after Leonard Salomon Ornstein and Frits Zernike) is an integral equation for defining the direct correlation function. It basically describes how the correlation between two molecules …   Wikipedia

Share the article and excerpts

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