diffusion velocity

diffusion velocity

[də′fyü·zhən və′läs·əd·ē]
(fluid mechanics)
The relative mean molecular velocity of a selected gas undergoing diffusion in a gaseous atmosphere, commonly taken as a nitrogen (N2) atmosphere; a molecular phenomenon that depends upon the gaseous concentration as well as upon the pressure and temperature gradients present.
The velocity or speed with which a turbulent diffusion process proceeds as evidenced by the motion of individual eddies.
References in periodicals archive ?
m] are the mass fraction, diffusion velocity, and the production rate of the mth species, respectively.
The diffusion velocity of the mth species is usually evaluated from Fick's law of diffusion and can be expressed in the following form
Moreover, higher electrical conductivity and better contact, corresponding to a slower diffusion velocity of the [I.
lim]) was observed from PPy-integrated poly (HEMA/CTAB) relative to that of poly(HEMA/CTAB), reflecting a higher diffusion velocity for the redox couple in the electrolyte.
Increasing temperature could improve both of the diffusion velocity of carbonium ions (+C[H.
The evaluation of enthalpy values allows an analysis of the energy contribution that is added to the process which is responsible for altering the water diffusion velocity (BAYRAM et al.
x] is not the diffusion velocity of the particle but the rate with which changes [increment of x], so [F.
The relationship between diffusion and gas density is clearly observed in Graham's Diffusion Law, which states that diffusion velocity is inversely proportional to the square root of gas density (Cremasco, 2002).
alpha]] are taken into account and then the total velocity is divided into the velocity of centre of gravity w and the diffusion velocity [u.
The thermophoretic drift velocity and diffusion velocity gives the total particle deposition rate to the wall in each discrete segment.
Chi], which is a reciprocal Peclet number, gives the ratio of the diffusion velocity and the maximum velocity of the swelling front; [[Phi].

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