Equation icon  Fick's first law of diffusion

 
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Resource type: Equation
Description: Fick's first law of diffusion states that flux moves from regions of high concentration to regions of low concentration with a magnitude that is proportional to the concentration gradient.

TeX format: J = -D\frac{\partial \phi }{\partial x}

J {J} = Diffusion flux (mol.m-2s-1) {mol.m^{-2}s^{-1}}
D {D} = Diffusivity (m2s-1) {m^2s^{-1}}
φ {\phi} = Concentration (mol.m-3) {mol.m^{-3}}
x {x} = Position (m) {m}

Keywords: Fick • diffusion • precipitation • solid-state diffusion • multicomponent alloys • carburising • corrosion
Categories: Science approaches
Science approaches > Diffusion
Science approaches > Strengthening mechanisms > Solid-solution strengthening
Science approaches > Strengthening mechanisms > Precipitation (age) hardening
Created by: The University of Liverpool
License: This resource is released under the Creative Commons Attribution license (2.0 UK: England & Wales).
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Date created: 30 June 2010
Date added: 30 June 2010
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Resource ID: 2842