diffusive approximation

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• Fick's laws of diffusion — For the technique of measuring cardiac output, see Fick principle. Molecular diffusion from a microscopic and macroscopic point of view. Initially, there are solute molecules on the left side of a barrier (purple line) and none on the right. The… …   Wikipedia

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• Upwind scheme — In computational fluid dynamics, the upwind schemes are any of a class of discretization methods to solve hyperbolic partial differential equations numerically. The wave equation, the advection equation, the Euler equations in fluid dynamics, etc …   Wikipedia

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• Dephasing rate SP formula — The SP formula for the dephasing rate Γφ of a particle that moves in a fluctuating environment, unifies various results that have been obtained, notably in condensed matter physics with regard to the motion of electrons in a metal [1] [2] [3] [4] …   Wikipedia

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• Path integral formulation — This article is about a formulation of quantum mechanics. For integrals along a path, also known as line or contour integrals, see line integral. The path integral formulation of quantum mechanics is a description of quantum theory which… …   Wikipedia