diffusivity


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Related to diffusivity: eddy diffusivity, magnetic diffusivity

diffusivity

[dif·yü′ziv·əd·ē]
(thermodynamics)
The quantity of heat passing normally through a unit area per unit time divided by the product of specific heat, density, and temperature gradient. Also known as thermal diffusivity; thermometric conductivity.
References in periodicals archive ?
Results of whole-brain voxel-wise group comparison of axial, mean, and radial diffusivity (schizophrenia patients > healthy controls) Cluster size MNI peak White matter DTI measurement (voxel) coordinates tract (*) Axial diffusivity 1749 -30 -20 40 Left SLF -31 -40 40 Left SLF -26 -10 43 Left SLF Mean diffusivity cluster-1 2428 30 -15 15 Left SLF 11 -11 -3 Right ATR 11 -9 7 Right ATR 35 -4 10 Right SLF 24 -14 14 Right CST 31 -22 24 Right SLF 28 -12 23 Right CST Mean diffusivity cluster-2 12474 -26 -14 18 Left CST -29 -8 15 Left SLF -17 -9 10 Left ATR -30 -18 36 Left SLF -10 -6 9 Left ATR -24 -25 43 Left CST -10 -14 0 Left ATR -15 -20 5 Left ATR -39 -7 41 Left SLF Radial diffusivity 1466 -10 -6 6 Left ATR DTI measurement [T.
eff] is the effective diffusivity of moisture vertical to the bedding plane direction; [[lambda].
infinity]] is the weight of sample at infinite time, i is the thickness of sample and D is the diffusivity.
The theoretical determination of effective moisture diffusivity of banana using the solution to Fick's second law has been widely used by various researchers (Doymaz, 2009; Thuwapanichayanan et al.
Using the numerical analyses provided by Crank [10] the diffusivity is determined primarily from the initial slope of the curve and the solubility by the long-time equilibrium uptake.
Secondary ion mass spectrometry (SIMS) has become increasingly popular for measuring diffusivity over the past 40 years because it avoids the handling problems, environmental concerns, and shortage of suitable isotopes that are associated with using radioactive tracer methods.
The information can be used to directly assess the drying propensity of a given concrete mixture, [and] could be valuable for industrial flooring applications where quick drying is often desirable," explains Bentz, adding that the data can also be analyzed for estimates of the mixture's vapor diffusivity and Liquid permeability characteristics.