Eddy-Diffusion

Under Eddy Eddy diffusion or dispersion is the process by which substances in the atmosphere or any fluidem system are mixed by vortex motion. In German, alongside the term eddy diffusion and eddy diffusion or scattering diffusion is used.

Chromatography

In chromatography, the eddy diffusion describes the first part of the Van Deemter equation. It provides a contribution to the band broadening due to uneven substance migration within a column packed with non-uniformly sized particles column. The sample molecules migrate not linear, but " zig -zag " in different ways by the separation bed. The contribution of the eddy diffusion is independent of the linear velocity of the mobile phase.

Fluid Mechanics

In fluid dynamics we mean by eddy diffusion the spread or distribution of a substance in a fluid flowing through turbulent mixing. In contrast to molecular diffusion, the turbulent diffusion is much faster. An illustrative example is a cup of coffee with a cube of sugar. Even if the sugar dissolves relatively quickly, it takes hours to days, until the sugar is distributed by diffusion into the cup. Once accomplished by stirring the same turbulence in seconds.