@TechReport{	  it:2007-019,
  author	= {Sofia Eriksson and Magnus Sv{\"a}rd and Jan Nordstr{\"o}m},
  title		= {Simulations of Ground Effects on Wake Vortices at
		  Runways},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2007},
  number	= {2007-019},
  month		= jun,
  abstract	= {In this paper the interaction between two counter-rotating
		  vortices is examined, and the performance of a newly
		  developed finite difference code is discussed. The Reynolds
		  numbers considered are low to medium, and the flow is
		  compressible. Most of the computations are performed in a
		  two dimensional domain, with different grid sizes, Reynolds
		  number and order of accuracy of the scheme. Finally, a
		  three dimensional computation is made in order to examine
		  the relevance of the two dimensional model.}
}