Air at 10°C and I atm flows over a flat plate (30 cm x100 cm) at...

Air at 10°C and I atm flows over a flat plate (30 cm x100 cm) at 20 m/s. The plate is maintained at 70°C. (a) calculate the boundary layer thikness at distances of 30 cm and 100 cm, (b) calculate the heat transfer from first 30 cm and from whole the plate.

Solutions

Expert Solution

usimg given data and air propeties at mean tmepertaure we can find the required variables

for any doubts write in comments

Amanda K answered 1 year ago

Next > < Previous

Related Solutions

Air at 1 atm and 27 degree C flows across a flat plate at a velocity...

Air at 1 atm and 27 degree C flows across a flat plate at a velocity of 14 m/s. Find the distance from the leading edge where transition to turbulent flow begins and the local heat-transfer coefficient at this point if the temperature of the plate is 77 degree C.

A thin plate is suspended in air at 1 atm. with T_infinite= 15°C. Air flows on...

A thin plate is suspended in air at 1 atm. with T_infinite= 15°C. Air flows on both sides of the plate where the bottom side absorbs a uniform radiative heat flux of 1542 W/m2. The plate is oriented parallel to the flow and the length along the flow direction is 60 cm. Consider the plate is negligibly thin and the width of the plate (perpendicular to the flow) is large, so that the problem can be considered as a 2D...

The air, which has a temperature of 120 ° C, flows over a plate with a...

The air, which has a temperature of 120 ° C, flows over a plate with a length of 1.2 m and a constant temperature of 30 ° C across the surface, and its speed flows at a speed of 2 m / s. According to this, a.) Calculate the speed and temperature boundary layer thickness at the end of the plate. b.) Find the local heat transfer coefficient and heat flux at the end of the plate. c.) Find the...

Air flows over a 4 meter long flat plate at a velocity of 8 m/s. Using...

Air flows over a 4 meter long flat plate at a velocity of 8 m/s. Using a spreadsheet, calculate the boundary layer thickness and wall shear stress at 0.1 meter intervals along the plate. Do not plot the wall shear stress at x=0. Use a transition Reynolds number of 5 x 10^5 . (You will need to calculate Rex at each location to determine if the laminar or turbulent correlations should be used.) Generate a spreadsheet table that includes columns...

Air at 15°C flows at 9 m/s parallel to a thin flat plate measuring 260 mm...

Air at 15°C flows at 9 m/s parallel to a thin flat plate measuring 260 mm × 390 mm. The direction of flow is parallel to the 260-mm edges. The surface of the plate is at a uniform temperature of 85°C. The plate is in a large chamber with walls at a temperature of 22°C. The emissivity of the plate’s surfaces is 0·75. (a) Determine the rate of convective heat transfer from one side of the plate to air. [16]...

Air at 20°C and 1 atm flows over a spherical object at 1 m/s. The sphere...

Air at 20°C and 1 atm flows over a spherical object at 1 m/s. The sphere has a diameter of 10mm and its initial temperature is 134°C. If the density, specific heat, and conductivity of the sphere are 7832 kg/m”, 549 J/kg.K, and 49.2 W/m.K, respectively, calculate the temperature at the center of the sphere after 100 seconds.

Air enters a 30-cm-diameter cooling section at 1 atm, 35 C, and 60 percent relative humidity...

Air enters a 30-cm-diameter cooling section at 1 atm, 35 C, and 60 percent relative humidity at 120 m/min. The air is cooled by passing it over a cooling coil through which cold water flows. The water experiences a temperature rise of 8 C. The air leaves the cooling section saturated at 20 C. (a) Determine the rate of heat transfer. Round your answer to the nearest tenth. Qout = _____ kJ/min (b) Determine the mass flow rate of...

Forced convection A thin plate is suspended in air at 1 atm. with T? = 15°C....

Forced convection A thin plate is suspended in air at 1 atm. with T? = 15°C. Air flows on both sides of the plate where the bottom side absorbs a uniform radiative heat flux of 1542 W/m2. The plate is oriented parallel to the flow and the length along the flow direction is 60 cm. Consider the plate is negligibly thin and the width of the plate (perpendicular to the flow) is large, so that the problem can be considered...

Consider a 1.5m long 30cm wide flat plate exposed to two laminar flows of air (6...

Consider a 1.5m long 30cm wide flat plate exposed to two laminar flows of air (6 m/s free stream top surface and 12m/s free stream bottom surface) at 25ºC and atmospheric pressure. The top and bottom surfaces of the plate are electrically heated (1.5 kW total power, heaters assumed infinitesimally thin). The plate consists of 3 layers: a top and bottom layer of 1.0 cm balsa wood (k = 0.055 W/(m·K)), and a middle layer of 2.0 cm plywood (k...

Air at 30 C flows at 10 m/s across an in-line tube bank consist of 5...

Air at 30 C flows at 10 m/s across an in-line tube bank consist of 5 rows with 10 tubes per row. The diameter of the tube is 5 cm and the tube pitch is 13 cm. Water flowing in tube maintains the tube surface temperature at 80C find the following: a) the air temperature at the outlet of the tube b) the convective heat transfere per unit length per tube to the air ( it is heat transfer problem...

Subjects