What is the type of flow at these two sections?

Question

Air at a temperature of 30^oC flows over a flat plate of length 2m, which is maintained at 150^oC. The air flows with a velocity of 12m/s . Find the local heat transfer coefficient at a distance of 0.5m from the leading edge, and at the trailing edge. What is the type of flow at these two sections? At what length , does the flow pattern change?

         The properties of air at the mean temperature of 90^o C are

         C_p = 1.01kJ/kg^oC , r= 0.962kg/m³

         m = 2.131´10^-5kg/m-s , k = 0.031W/mK

         Use the equations :

         Nu = 0.332 Re^0.5 Pr^0.33  for laminar flow,

         Nu = 0.0296 Re^0.8 Pr^0.33 for turbulent flow.