Examples of blob

• How can we connect our ideas about random convection and relative dispersion of contaminant blobs with this need to model 'smearing ' processes ?

• Extrapolations from experiment suggest that the two-dimensional shear layer will consist a t every stage of a linear arrangement of blobs of vorticity.

• An example related to the development and coalescence of two initially separated blobs in a cell on a spherical surface is presented.

• We now consider the merging of two vortex blobs more quantitatively.

• According to table 1 the vortex blobs are initially a bit elongated in the x direction as one would expect.

• The shear layer consists at every stage of an array of clusters of vortex blobs.

• The size of these clusters, and hence the degree of scatter of the vortex blobs about the midline, determines the layer thickness.

• The simple picture of the shear layer as a line of vortex blobs, that merge painvise thus thickening the layer, is not seen.