Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Consider an experiment to investigate the transition to turbulent flow in a free convection boundary layer that develops along a vertical plate suspended in a large room. The plate is constructed of a thin heater that is sandwiched between two aluminum plates and may be assumed to be isothermal. The heated plate is 1 m high and 2 m wide. The quiescent air and the surroundings are both at 25°C.
(a) The exposed surfaces of the aluminum plate are painted with a very thin coating of high emissivity (s = 0.95) paint. Determine the electrical power that must be supplied to the heater to sustain the plate at a temperature of Ts = 35°C. How much of the plate is exposed to turbulent conditions in the free convection boundary layer?
(b) The experimentalist speculates that the roughness of the paint is affecting the transition to turbulence in the boundary layer and decides to remove the paint and polish the aluminum surface (s = 0.05). If the same power is supplied to the plate as in part (a), what is the steady-state plate temperature? How much of the plate is exposed to turbulent con- ditions in the free convection boundary layer?
A rotating saw blade has 48 teeth and 4 slots. If the room where the saw is used is illuminated with a pulsed light source, at what pulse frequencies will The saw blade teeth appear to be stationary?
a pipeline connects 2 reservoirs. the elevation of the upper reservoir is 20 m higher than the elevation of the lower
how is diffusion time related to diffusion temperature for the case where the concentration at some distance into an
a solar hot-water system stagnates at 85 c under insolation of 740 wm2 and an ambient temperature of 17 c. find its
A four-pole, star-connected, squirrel-cage induction motor operates from a variable voltage 50 Hz three-phase supply. The following results were obtained as the supply voltage was gradually reduced with the motor running on no-load. Stator line vo..
find the equal annual payment series that would be equivalent to the following increasing series of payments if the
air at 20 degree c 40 rh is mixed adiabatically with air at 40 degree c 40 rh in the ratio of 1 kg of the former to 2
Reheat is added to an ideal Rankine steam power cycle to improve it’s efficiency and turbine exit quality. Steam enters the HP turbine at 15 MPa and 600C. Steam exits the HP turbine at 4 MPa and enters the boiler for reheat. Then the steam enters the..
Draw a qualitative shape for the bending moment diagram for the beam loaded as shown. Clearly state any assumptions you make.
The crank rotates at a speed of 60 rpm and the centre distance OC is 90 mm. At the instant shown determine the velocity of C, the angular velocity of the rocker BC and the angular velocity of the connecting rod AB.
consider a reheat cycle with steam leaving the boiler and entering the turbine at 4 mpa and 400 c . after expanded in
a 4.53 kg mass attached to the lower end of a spring whose upper end is fixed vibrates with a natural period of 0.45
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd