Calculation of the separation streamlines of barchans and transverse   dunes
  We use FLUENT to calculate the wind profile over barchans and transverse dunes. The form of the streamlines of flow separation at the lee side of the dunes is determined for a symmetric barchan dune in three dimensions, and for the height profile of a measured transverse dune field in the Len\c{c}\'ois Maranhenses. 
H. J. Herrmann, J. S. Andrade Jr., V. Schatz, G. Sauermann, E. J. R.   Parteli