• The effective diffusion coefficient of a diffusant[clarification needed] in atomic diffusion of solid polycrystalline materials like metal alloys is often...
    2 KB (291 words) - 05:27, 19 October 2023
  • diffusivity or diffusion coefficient is usually written as the proportionality constant between the molar flux due to molecular diffusion and the negative...
    14 KB (1,697 words) - 07:04, 19 April 2025
  • Thumbnail for Atomic diffusion
    activation energy for diffusion. Atomic diffusion in polycrystalline materials is therefore often modeled using an effective diffusion coefficient, which is a combination...
    4 KB (466 words) - 08:33, 8 April 2023
  • Thumbnail for Fick's laws of diffusion
    solve for the diffusion coefficient, D. Fick's first law can be used to derive his second law which in turn is identical to the diffusion equation. Fick's...
    58 KB (8,249 words) - 16:41, 24 May 2025
  • effective diffusion coefficient in the strain rate equation depends on whether or not the system is dominated by core diffusion or lattice diffusion and...
    32 KB (4,150 words) - 18:57, 22 May 2025
  • interdiffusion, hence most models of ion mixing involve an effective diffusion coefficient that is used to characterize thickness of the reacted layer...
    8 KB (969 words) - 12:03, 25 May 2025
  • The grain boundary diffusion coefficient is the diffusion coefficient of a diffusant along a grain boundary in a polycrystalline solid. It is a physical...
    5 KB (693 words) - 12:50, 26 May 2025
  • In engineering, the mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change...
    2 KB (322 words) - 13:05, 23 May 2024
  • Thumbnail for Diffusion
    d and mass m (self-diffusion). In this case, the elementary mean free path theory of diffusion gives for the diffusion coefficient D = 1 3 ℓ v T = 2 3...
    59 KB (8,686 words) - 00:02, 24 May 2025
  • Thumbnail for Corrosion
    {D_{i}}{\pi t}}}} , where t is time, Di is the ith cation effective diffusion coefficient (cm2/d), which depends on pH of contacting water as Di = Di0·10–pH...
    50 KB (6,458 words) - 23:44, 7 June 2025
  • Thumbnail for Diffusion of innovations
    Diffusion of innovations is a theory that seeks to explain how, why, and at what rate new ideas and technology spread. The theory was popularized by Everett...
    66 KB (7,271 words) - 05:17, 26 May 2025
  • machines has led to the neoclassical diffusion concept. Bohm diffusion is characterized by a diffusion coefficient equal to D Bohm = 1 16 k B T e B , {\displaystyle...
    13 KB (2,106 words) - 17:05, 9 February 2025
  • increases the hydraulic conductivity (K, m/s) of concrete and the effective diffusion coefficients (De, m2/s) of solutes and dissolved gases in the concrete matrix...
    17 KB (2,025 words) - 02:36, 24 March 2024
  • }}c^{*}} where: Deff is the effective diffusion coefficient (taking tortuosity into account, if any); δ is the diffusion layer thickness; c* is the concentration...
    18 KB (3,205 words) - 08:23, 20 July 2024
  • absorption (black) and the effective attenuation (magenta) coefficient spectra, as shown in Figure 6 (a). 'cite: Anisotropic diffusion filter for dorsal hand...
    14 KB (1,790 words) - 17:00, 19 February 2025
  • Thumbnail for Disk diffusion test
    The disk diffusion test (also known as the agar diffusion test, Kirby–Bauer test, disc-diffusion antibiotic susceptibility test, disc-diffusion antibiotic...
    32 KB (2,932 words) - 05:35, 23 May 2025
  • can be described by a generalization of the usual diffusion equation where the diffusion coefficient, instead of being a constant scalar, is a function...
    12 KB (1,754 words) - 14:12, 15 April 2025
  • where D = s 2 / 2 τ {\displaystyle D=s^{2}/2\tau } is the effective diffusion coefficient. Here s {\displaystyle s} is the step size or distance traveled...
    11 KB (1,547 words) - 22:32, 23 May 2025
  • to prevent or to retard the inter-diffusion of the two superposed metals. Therefore, to be effective, a good diffusion barrier requires inertness with respect...
    5 KB (607 words) - 20:12, 11 May 2025
  • Thumbnail for Stern–Volmer relationship
    the limiting factor, and almost all such collisions are effective), the quenching rate coefficient is given by k q = 8 R T / 3 η {\displaystyle k_{q}={8RT}/{3\eta...
    3 KB (497 words) - 11:01, 17 May 2024
  • the higher diffusion coefficient will be larger, so there will be a net flux of atoms from the material with the higher diffusion coefficient into the material...
    12 KB (1,651 words) - 19:57, 25 May 2025
  • Thumbnail for Knudsen diffusion
    molecule itself. The diffusivity for Knudsen diffusion is obtained from the self-diffusion coefficient derived from the kinetic theory of gases: D A...
    6 KB (1,042 words) - 23:53, 2 March 2025
  • diffusion curves, and D s , e f f {\displaystyle Ds,eff} is an effective diffusion coefficient (eq. 3) which relates the inverse gradient of the fit polynomial...
    16 KB (2,064 words) - 06:24, 3 June 2025
  • affected by biological parameters: The effective diffusion coefficient, which is dependent on extracellular diffusion, intracellular transport rates, and...
    26 KB (3,158 words) - 19:55, 1 January 2025
  • Thumbnail for Radiative transfer equation and diffusion theory for photon transport in biological tissue
    _{a}+\mu _{s}')}}} is the diffusion coefficient and μ's = ( 1 − g ) {\displaystyle =(1-g)} μs is the reduced scattering coefficient. Notably, there is no...
    23 KB (3,973 words) - 15:42, 29 May 2025
  • multiples of electron charges. In 1905, Albert Einstein found the diffusion coefficient D {\displaystyle D} of an ion to be proportional to its mobility...
    5 KB (684 words) - 04:49, 12 April 2025
  • Partition coefficient – Ratio of concentrations in a mixture at equilibrium Scientific laws named after people Graham's law – Graham's law of diffusion Henry...
    31 KB (4,896 words) - 13:18, 8 May 2025
  • reasonably well approximated as an “effective” Brownian motion, i.e., DB represents the effective diffusion coefficient of the moving scatterers. In order...
    11 KB (1,588 words) - 15:14, 28 May 2025
  • Thumbnail for Soil consolidation
    changes volume slowly at constant effective stress over a longer time-scale than consolidation due to the diffusion of water. To distinguish between the...
    19 KB (2,500 words) - 23:58, 23 May 2025
  • Thumbnail for Homeotic protein bicoid
    retention as a size-dependent regulator of Bicoid protein's effective diffusion coefficient, and scaling of cytoplasmic streaming. Maternal effect Little...
    11 KB (1,170 words) - 23:57, 18 May 2024