Effect of width and temperature of a vertical parallel plate channel on the transition of the developing thermal boundary layer

Transition of free convection flow inside an inclined parallel walled channel: Effects of inclination angle and width of the channel

“…In the recent study, Alzwayi and Paul [2013] have examined that the Realizable k-• turbulent model (Shih et al [1995]) performs best in predicting the transition of the free convection flow over a vertical channel, compared to the other two well know models (standard and RNG). Therefore, this model is particularly chosen in the present study to determine the turbulent viscosity µ t which depends on the turbulent dissipations energy µ, and the turbulent kinetic energy k.…”

“…The numerical methods used to solve the governing equations have already been described in Alzwayi and Paul [2013] and validated with suitable experimental data in a vertical heated channel.…”

“…In fact, all the papers cited above either considered laminar or turbulent flow and neglected the transition of developing free convection in an inclined channel. Most recently, Alzwayi and Paul [2013] have investigated numerically the transition of thermal boundary layer in a vertical parallel plate channel with an affect of its width and temperature.…”

Large eddy simulation of transition of free convection flow over an inclined upward facing heated plate

“…The fluid temperature varies along the plate with a very green dark colour showing a low temperature especially in the bottom of the plate near the inlet section, while in the downstream the green colour appears as the temperature becomes relatively large there. The surface temperature can be used to determine the local heat transfer coefficients as done in Alzwayi and Paul [12,13]. This local heat transfer coefficient will be large in the low temperature region towards the downstream regime but small in the high temperature located in the upstream where the streaks and waves started to develop along the flow.…”

“…They investigated the influence of high order effects of the boundary layer on the vortex instability of thermal boundary layer flow in a wedge-shaped domain formed by the heated and the outer boundary surface. Most recently, Alzwayi and Paul [12] numerically investigated the transition of a thermal boundary layer in a vertical parallel plate channel and its dependence on plate width and temperature. In the context of a heated surface facing downward, Alzwayi and Paul [13] also studied the transition of free convection flow in an inclined parallel walled channel.…”