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!
A straight fin of uniform cross section is fabricated from a material of thermal conductivity k = 5 W/m*K, thickness w = 20 mm and lenghth L = 200 mm. The fin is very long in the direction normal to the page. The base of the fin is maintained at Tb = 200 degrees C, and the tip conditions allow for convection (case A of Table 3.4), with h = 500 W/m2*K and T∞ = 25 degrees C.
(a) Assuming one-dimensional heat transfer in the fin, calculatethe fin heat rate, qf` (W/m), and the tip temperature TL. Calculate the Boit number for the fin to determine Whether the one-dimensional assumption is valid.
(b) Using the finite-element method of FEHT, perform a two-dimensional analysis on the fin to determine the fin heat rate and tip temperature. Compare your results with those from the one-dimensional, analytical solution of part (a). Use the View/Temperaure Contours option to display isotherms, and discuss key features of the corresponding temperature field and heat flow pattern. Hint: In drawing the outline of the fin, take advantage of symmetry. Use a fine mesh near the base and a coarser mesh near the tip. Why?
(c) Validate your FEHT model by comparing predictions with the analytical solution for a fin with thermal conductivities of k = 50 W/m*K and 500 W/m*K. Is the one-dimensional heat transfer assumption valid for these conditions?
consider water as the substance at 30 bar and 450c.a calculate specific volume m3kg using ideal gas equation of state.b
air enters the compressor of a brayton refrigeration cycle at 100 kpa 270 k. the compressor pressure ratio is 3 and the
a string is attached to the drum radius r of a spool radius r as shown in side and end views here. a spool is device
a hollow steel shaft 6 ft long has an outer diameter of 2.5 in. and an inner diameter of 1.5 in. the shaft is
a cylindrical pressure tank 15 feet long and 40 inches in mean diamater is to be fabricated from .5 inch steel. a 15
1. a fire hose nozzle has an orifice diameter of 1inch. according to some fire codes the nozzle must be capable of
a four-cylinder engine with a 9.5-cm bore and an 8.75-cm stroke has a 7 clearance. the engine rotates at 2500 rpm. the
a stone is thrown vertically upward from a point on a bridge located 40 m above the water. knowing that it strikes the
orifices are commonly placed in flow lines to measure the flow rate through the line. the flow rate is proportional to
1 current airbag regulations specify that they must only pass a test designed to protect a 175 pound male who is not
the cutting stroke of a planing machine is 500 mm and it is completed in 1 second. the planing table accelerates
a heat pump with refrigerant 134-a as the working fluid is used to keep a space at 25c by absorbing heat from
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