diffusion circulation
1.A nonlinear and non-steady two-dimensional numerical model is used to study the thermal effect of urbanization on wind, temperature and vertical eddy diffusion coefficient and the evolution of nocturnal urban heat island circulation.
2.The effect of internal diffusion on the kinetics of isomerization of butene-l over CeO_2/SiO_2 catalyst has been investigated in an external circulation gradientless reactor.
