Turbulent viscosity variability in self-propelled body wake model
  We study the influence of turbulent viscosity variability on the properties of self-propelled body wake model. In addition to the already known integrals of motion obtained with constant turbulent viscosity, we obtain new ones. The presence of new integrals of motion leads, in particular, to changes in the behavior of the width and profile of the wake leading to its conservation. 
K. Dubrovin, M. Gedalin, E.Golbraikh, A. Soloviev
physics.flu-dyn physics.ao-ph