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The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as

The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as Correct Answer H<sub>a</sub> = 2h<sub>L</sub>

Related Questions

The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as
Experimental results indicate that the local heat transfer coefficient h g for flow over a flat plate with an extremely rough surface is approximated by the relation h x = a x -0.12 Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?
A stream of air at 100 kPa pressure and 300 K is flowing on the top surface of a thin flat sheet of solid naphthalene of length 0.2 m with a velocity of 20 m/sec. The other data are: Mass diffusivity of naphthalene vapor in air = 6 * 10 –6 m2/sec Kinematic viscosity of air = 1.5 * 10 –5 m2.sc Concentration of naphthalene at the air-solid naphthalene interface = 1 * 10 – 5 kmol/m3 Calculate the overage mass transfer coefficient over the flat plate. Note: For heat transfer over a flat plate, convective heat transfer coefficient for laminar flow can be calculated by the equation. Nu = 0.664 ReL1/2 Pr1/3 you may use analogy between mass and heat transfer.
Which of the following sequence of Heat zones is/are correctly placed? A) Torrid zone, South temperate zone and Frigid zone. B) Torrid zone, North temperate zone and Frigid zone. C) South temperate zone, torrid zone and Frigid zone. Select the correct answer given below.
If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
If average heat transfer co-efficient is $${{\text{h}}_{\text{a}}}$$ and the local coefficient at the end of the plate is $${{\text{h}}_l}$$ then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
Six flats A, B, C, D, E and F are located in two rows of three flats each. The flats in both the rows face each other. Flat D is diagonally opposite to flat C. Flat E is opposite to flat F, which is north facing. Flat C is 2nd to the left of A and both of flats are south facing. Which of the following flats is facing flat B?
Ambient air at 20 degree Celsius flows past a flat plate with a sharp leading edge at 3 m/s. The plate is heated uniformly throughout its entire length and is maintained at a surface temperature of 40 degree Celsius. Calculate the local convective heat transfer coefficient. Assume that transition occurs at a critical Reynolds number of 500000
A flat plate 1 m by 1 m is placed in a wind tunnel. The velocity and temperature of free stream air are 80 m/s and 10 degree Celsius. The flow over the whole length of the plate is made turbulent by turbulizing grid placed upstream of the plate. Find the heat flow from the surface of the plate
Study the following information carefully and answer the following questions. Dhawan plans to buy a flat at Shyamla Society. Shyamala Society has placed the following conditions for allotment of flats in its society: Applicant: (I). State domicile certificate must be submitted. (II). Must have done a job of at least 5 years. (III). If needed, he will be ready to pay the entire amount in 5 years. (IV). Should not be the owner or co-owner (if spouse) of the residential facility in that city (V). Should not be below 35 years of age as on 31 December 2016.   In the case of the applicant who fulfils all other criteria except: A) (I) As mentioned above, should be referred to the chairman of the city council. B) (II) As mentioned above, prepared to provide Aadhaar card. To be referred to the vice-chairman of the committee C) (III) As mentioned above, but a freedom fighter or ex-soldier or the first relationship with these should be referred to a member of the committee. The last date for receipt of applications was 31 December 2016. The conditions of 31 December 2016 are to be met. Based on these criteria, decide whether you have to allot the flat in the following case given on 1 January 2017. Dhawan is an industrialist and from another state who established his factory in 2000 and has a state residence certificate. He is ready to pay the full amount in 4 years if necessary. He does not have a house in that city but his wife has a flat. His date of birth is 11 November 1970.