Diffusive
41Numerical diffusion — is a difficulty with computer simulations of continua (such as fluids) wherein the simulated medium exhibits a higher diffusivity than the true medium. This phenomenon can be particularly egregious when the system should not be diffusive at all,… …
42Magnetic Reynolds number — The Magnetic Reynolds number is a dimensionless group that occurs in magnetohydrodynamics. It gives an estimate of the effects of magnetic advection to magnetic diffusion, and is typically defined by: where U is a typical velocity scale of the… …
43Nernst-Planck equation — The Nernst Planck equation describes the flux of ions through a diffusive membrane under the influence of both an ionic concentration gradient (X) and electric potential (V).It is defined :Phi = D abla X P X abla VWhere D is a set of constants… …
44Weak localization — is a physical effect, which occurs in disordered electronic systems at very low temperatures. The effect manifests itself as a positive correction to the resistivity of a metal or semiconductor.The effect is quantum mechanical in nature and has… …
45Diffusion (acoustics) — Diffusion, in acoustics and architectural engineering, is the efficacy by which sound energy is spread evenly in a given environment. A perfectly diffusive sound space is one that has certain key acoustic properties which are the same anywhere in …
46Sergei P. Kurdyumov — Sergei Pavlovich Kurdyumov (Russian: Сергей Павлович Курдюмов November 18, 1928 ndash; December 2, 2004) was a specialist in mathematical physics, mathematical modeling, plasma physics, complexity studies and synergetics from Moscow,… …
47Surface photovoltage — (SPV) measurements are a widely used method to determine the minority carrier diffusion length of semiconductors. Since the transport of minority carriers determines the behavior of the p n junctions that are ubiquitous in semiconductor devices,… …
48Robin boundary condition — In mathematics, the Robin (or third type) boundary condition is a type of boundary condition, named after Victor Gustave Robin (1855 1897) who lectured in mathematical physics at the Sorbonne in Paris and worked in the area of thermodynamics.… …
49Blue sky catastrophe — The blue sky catastrophe is a type of bifurcation of a periodic orbit. In other words, it describes a sort of behaviour stable solutions of a set of differential equations can undergo as the equations are gradually changed. This type of… …
50Upwind 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 …
