Fig. 9.
Typical water vapour concentration isocontours (i.e. of constant xv) in the boundary layer above the leaf surface for Ub = 2 m s−1 at a CR of 1 %. The dimensionless isocontour value (Iv) is also given. These isocontours are coloured according to air speed. One isocontour is shown per image. In addition, air speeds in a horizontal and vertical centreplane are also shown. The cross-section between these planes is indicated by the black line. The white area indicates the leaf surface. The colour scale includes the entire air speed range.