The wind flow isovels were drawn not on the basis of the values of absolute wind velocity, but on the percentage expression of wind velocity (where a 100% isovel corresponds to wind velocity in the middle point of the beach, at a height of 2 m above the ground surface).
0 m layer decreased as a result of changes in topography and the presence of marram grass, but increased (convergence in upper isovels of the wind flow) above that level (1.
0 m) it increased significantly (convergence in isovels of the wind flow; Fig.
2 m continued to decrease due to the occurrence of marram grass, while in the higher layers it increased because of the convergence of isovels over the incipient dune crest (Fig.
increases at the stoss slope of a foredune where wind isovels become compressed, reaching 0.
This suggests that the form of these isovels is related to the form of the gas core; we show below how an appropriately defined isovel can provide a good approximation to the form and location of the gas-liquid interface after gas injection.
The location of the gas-melt interface resulting from gas injection is then approximated by the isovel of an appropriately defined mean velocity on a plane perpendicular to the principal flow direction.
5 represents the interface location prediction by the full analysis, and the isovel contour v/[bar.
This is probably because it results in an adjustment to the isovel position over the whole channel cross section, whereas a more localized correction is needed in this case.
The approach is based on steady-state flow analysis for a single fluid (polymer melt) and the identification of an appropriately chosen isovel of the flow.
2,n6], which is assumed to be a curve formed on the melt surface along the isovel of [V.
2,n6] was assumed to be formed along the isovel of [V.