Govan A H.A simple equation for the diffusion coefficient of large particles in a turbulent gas flow. International Journal of Multiphase Flow . 1989A.H. Govan, A simple equation for the diffusion coefficient of large particles in a turbulent gas flow, Int. J. Multiphase Flow 15 (2) (...
The diffusion coefficient is an important constant in the formula used in many diffusion equations. There are many examples of equations for finding the diffusion coefficients of solids, liquids, and gases. The diffusion coefficient is an important factor in Fick's law. Fick's law states that th...
DS is a diffusion coefficient, or diffusivity for mass, momentum, or energy in the medium. The term Q is generally called a flux density (flow per unit area per unit of time). Equations for the specific case of matter are sometimes called mass-transfer equations. For momentum, the rate ...
Also the equation is believed to be valid only for cases of small absorption coefficient compared with the scattering coefficient. From recent numerical simulations, it was found that the conventional diffusion coefficient led to a large error in the early time after the impulse incidence, and it ...
diffusion equation 漫射方程,扩散方程 convective diffusion equation 对流扩散方程 Einstein diffusion equation 爱因斯坦扩散方程 neutron diffusion equation 中子扩散方程 reaction diffusion equation 反应扩散方程 elementary diffusion equation 基本扩散方程 general diffusion equation 一般扩散方程 coefficient of dif...
11. The measurements were correlated with the Tait-type equation for density and the Hard-sphere scheme for viscosity. 利用得到的实验数据,分别拟合了碳酸二乙酯黏度和密度方程。 12. Introducing mass density allows the equation to be simp... ...
Einstein and Smoluchowski's treatment of. the Brownian motion has been discussed. It is shown that although the diffusion equations derived from both treatments are mathematically identical, Smoluchowski's equation defines a somewhat concentration-dependent diffusion coefficient, while Einstein's equation de...
Arrhenius equation - Wikipedia
For the discrete-domain case, cd(x) represents the diffusion coefficient for direction d at location x. Although the diffusion coefficients here are defined using c(x) for the continuous case, the functions are equivalent in the discrete-domain case of cd(x). Typically c(x) is a non...
The fractional diffusion-wave equation (10.102) was intensively studied by F. Mainardi [131, 135, 133, 134, 137], and also by A. N. Kochubei [117], and A. M. A. El-Sayed [57]. A different type of equation has been proposed by J. D. Polack [210] for modelling wave propagation...