Papers Published

1. Bejan, A. and Cunnington, G. R., THEORETICAL CONSIDERATIONS OF TRANSITION TO TURBULENCE IN NATURAL CONVECTION NEAR A VERTICAL WALL., International Journal of Heat and Fluid Flow, vol. 4 no. 3 (1983), pp. 131 - 139 [0142-727X(83)90058-9] .
   (last updated on 2007/04/08)

   Abstract:
   Hydrodynamic stability analysis of an inviscid wall jet shows that instability is possible above a characteristic disturbance wavelength which is proportional to the jet thickness. This scaling is the basis for an argument that transition occurs when the fluctuating time period of the unstable (inviscid) wall jet is of the same order as the viscous diffusion time normal to the jet. Specifically, numerous observations on buoyant jets near isothermal walls, near constant-heat-flux walls, and in enclosures with vertical isothermal walls are shown to support the validity of the transition mechanism proposed.

   Keywords:
   FLOW OF FLUIDS - Turbulent;