PROBLEMS OF THE GRADIENT-DIFFUSION THEORY IN ITS APPLICATION TO THE DETERMINATION OF MASS AND ENERGY FLUXES
梯度扩散理论在能量和物质输送计算中的若干问题

Problems and limitation of the gradient-diffusion theory have been revealed with experiments recently made, The validity of this theory has also been discussed, the length scale of eddies must be much less than the spatial scale of the variation of gradients In terms of the Eulerian integration method the length scales of eddies were estimated for several examples in the near-surface air layer, under which the gradient-diffusion theory failed to be effection