A thin, flat plate that is 0.2 m × 0.2 m on a side with rough top and bottom surfaces is placed in a wind tunnel so that its surfaces are parallel to an atmospheric airstream having a velocity of 30 m/s. The air is at a temperature of T = 20°C while the plate is maintained at T₁ = 80°C. The plate is rotated 45° about its center point, as shown in the schematic. Airflows over the top and bottom surfaces of the plate, and measurement of the heat transfer rate is 2200 W. What is the drag force on the plate? Air T…".. FD = ILLANU Top view of thin, flat plate N

Air at 305 K flows at 4 m/s over a flat plate at 350 K. The air properties are as follows: density =1.1 kg/m3, viscosity =18.1×10−6 Pa.s, specific heat capacity =1005 J/kgK, and thermal conductivity =0.024 W/mK. The velocity and temperature profiles are assumed to be linear, giving the local Nusselt number to be Nux = 0.289 Rex1/ 2Pr1/3. The flow will become turbulent at a Reynolds number of 5×105. Assume the width of the plate perpendicular to the air flow is 1 m.   At what distance from the leading edge does the flow become turbulent? ________m What is the heat transfer at the point of transition? ___________W What is the total heat transfer along the length of the plate where the flow is laminar? __________W

Calculate the heat transfer from a 60 cm x 60 cm plate on which air flows at 40⁰C and. The plate temperature is 100⁰ C while the air speed is 5 m/s.Find the thickness of the boundary layer at a distance of x = 20 cm, for the same data in problem "number 1 In the picture below"