The "marker" velocity of a system undergoing this process is given by Darken's first equation.
In computational fluid dynamics, an error term known as the "false" type of this process appears when using upwind schemes. Nekhoroshev's theorem restricts the extent of this process in nearly integrable systems, where it leads to unstable growth of action variables. The "marker" velocity of a system undergoing this process is given by Darken's first equation. The expression "one-third" times "the integral from t equals zero to infinity" of the "velocity autocorrelation function" gives the proportionality constant in a partial differential equation governing this process that may be solved via the Boltzmann-Matano method. The current density in a semiconductor equals the sum of a drift component and a component named for this process. The product of k, T, and mobility gives this process's namesake coefficient. For 10 points, name this process described by Fick's laws, in which particles move down concentration gradients.
In computational fluid dynamics, an error term known as the "false" type of this process appears when using upwind schemes.
diffusion [or false diffusion; or Arnold diffusion; or interdiffusion; or diffusion current; or diffusion coefficient; prompt on mass transport; prompt on mass transfer]