Free Thermal Convection Driven by Nonlocal Effects
  We report and explain a convective phenomenon observed in molecular dynamics simulations that cannot be classified either as a hydrodynamics instability nor as a macroscopically forced convection. Two complementary arguments show that the velocity field by a thermalizing wall is proportional to the ratio between the heat flux and the pressure. This prediction is quantitatively corroborated by our simulations. 
Jorge Ibsen, Rodrigo Soto, Patricio Cordero