Shown in Figure Q.2 is a two-dimensional equilateral triangular geometry whose surfaces are numbered 1, 2...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Shown in Figure Q.2 is a two-dimensional equilateral triangular geometry whose surfaces are numbered 1, 2 and 3 as shown. All sides are 1 m in length. Blackbody emissive power of surfaces 1, 2 and 3 are E, E and E3 respectively. For an enclosure with n number of grey surfaces, the radiosity of the ith surface is linked to other radiosities via the equation: J - (1-6,;) FqJ, = 6, Ebi ] a) If all three surfaces (1, 2 and 3) of the triangular geometry are grey with emissivities , & and & respectively, show how you apply the above radiosity equation to write 3 equations that could be solved to obtain radiosities J, J, and J3. b) For a triangular geometry with surface areas 4, 4 and 43, the configuration factor F2 is given by F2 = (A + A A)/2A. Using this formula and other relevant configuration factor properties, calculate all necessary configuration factors required for the equations obtained in (a) and simplify the set of equations. Leave the blackbody emissive powers in their symbolic form. c) For a special case where the surface 3 of the above geometry is a re-radiating surface (p3 =1) and emissivity values of the other two surfaces are equal to 0.5, simplify the equations obtained in (b) and write a set of equations to obtain radiosities in terms of blackbody emissive powers. d) Use simple elimination to solve the equations obtained in (c) and write an expression for radiosity J, (in terms of blackbody emissive powers of surfaces 1 and 2). e) Use the expression obtained in (d) for J, to write an expression for heat transfer at surface 1. f) Draw an equivalent electrical circuit for the case described in (c) and obtain an expression for heat transfer at surface 1 to verify your result obtained in (e). 1 m 2 1 Figure Q.2 3 Shown in Figure Q.2 is a two-dimensional equilateral triangular geometry whose surfaces are numbered 1, 2 and 3 as shown. All sides are 1 m in length. Blackbody emissive power of surfaces 1, 2 and 3 are E, E and E3 respectively. For an enclosure with n number of grey surfaces, the radiosity of the ith surface is linked to other radiosities via the equation: J - (1-6,;) FqJ, = 6, Ebi ] a) If all three surfaces (1, 2 and 3) of the triangular geometry are grey with emissivities , & and & respectively, show how you apply the above radiosity equation to write 3 equations that could be solved to obtain radiosities J, J, and J3. b) For a triangular geometry with surface areas 4, 4 and 43, the configuration factor F2 is given by F2 = (A + A A)/2A. Using this formula and other relevant configuration factor properties, calculate all necessary configuration factors required for the equations obtained in (a) and simplify the set of equations. Leave the blackbody emissive powers in their symbolic form. c) For a special case where the surface 3 of the above geometry is a re-radiating surface (p3 =1) and emissivity values of the other two surfaces are equal to 0.5, simplify the equations obtained in (b) and write a set of equations to obtain radiosities in terms of blackbody emissive powers. d) Use simple elimination to solve the equations obtained in (c) and write an expression for radiosity J, (in terms of blackbody emissive powers of surfaces 1 and 2). e) Use the expression obtained in (d) for J, to write an expression for heat transfer at surface 1. f) Draw an equivalent electrical circuit for the case described in (c) and obtain an expression for heat transfer at surface 1 to verify your result obtained in (e). 1 m 2 1 Figure Q.2 3
Expert Answer:
Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
Posted Date:
Students also viewed these mechanical engineering questions
-
Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...
-
PLEASE GIVE CORRECT ANSWERS Prove that the number of comparators in any sorting network is (n log n). [4 marks] (ii) What does Part (d)(i) imply in terms of the depth of any sorting network? [1 mark]...
-
The graph of f(x) = ax 2 + bx + c is shown in the figure. Solve each inequality. (a) f(x) < 0 (b) f(x) = 0 I 3 -y=f(x)
-
A mirror at an amusement park shows an upright image of any person who stands 1.9 m in front of it. If the image is three times the person's height, what is the radius of curvature of the mirror?...
-
Use the results of the simulation study, summarized in Table 7.2, to answer the following questions. a. Which of skewness or heavy-tailedness appears to have the stronger effect on the chi-square...
-
Generalized Regression Techniques and Variable Selection In Chapter 9, we introduced generalized regression techniques as an approach to handling the multicollinearity problem. The LASSO can...
-
Archer Uniforms, Inc., is a distributor of professional uniforms to retail stores that sell work clothing to professionals, such as doctors, nurses, security guards, etc. Traditionally, most of the...
-
Why would you want to control access to a network by user and device, rather than just by user? Explain your answer.
-
You work for a company that manufactures toothbrushes, and you have been asked to conduct research to determine how the company can increase its toothbrush sales. Sales will increase if you can get...
-
Langley Clinics, Inc., buys $400,000 in medical supplies each year (at gross prices) from its major supplier, Consolidated Supplies, which offers Langley terms of 2.5/10, net 45. Currently, Langley...
-
A manufacturer budgets annual conversion costs of \(\$ 1,207,500\) and production of 2,100 hours. Compute the conversion cost rate per production hour.
-
Share prices on the Philippine Stock Exchange rise 12 percent in Philippine pesos. During the same period, the peso rises from $0.0425/peso to $0.0440/peso. By how much does the Philippine stock...
-
Identify each of the following production processes as lean (L) or traditional \((\mathrm{T})\). 1. The process produces standard goods, with no customization. Production begins with a sales...
-
A company reports accounts payable of \(\$ 9,569\) and cost of goods sold of \(\$ 28,155\). Compute days' payable outstanding. Round the answer to the nearest whole day.
-
Training programs are useful in preparing people for overseas assignments for many reasons. These reasons can be put into two general categories which are --------?
-
Sundial Technologies produces and sells customized network systems in New Brunswick. The company offers a 60-day, all software and labor-and an extra 90-day, parts-only- warranty on all of its...
-
A square (10 mm x 10 mm) silicon chip is insulated on one side and cooled on the opposite side by atmospheric air in parallel flow at U = 20 m/s and T = 24C. When in use, electrical power...
-
A cubical furnace 2 m on a side is used for heat treating steel plate. The top surface of the furnace consists of electrical radiant heaters that have an emissivity of 0.8 and a power input of 1.5 x...
-
One end of a stainless steel (AISI 316) rod of diameter 10 mm and length 0.16 m is inserted into a fixture maintained at 200C. The rod, covered with an insulating sleeve, reaches a uniform...
-
Use a HashMap to create a reusable class for choosing one of the 13 predefined colors in class Color. The names of the colors should be used as keys, and the predefined Color objects should be used...
-
Use SecureRandom method ints to generate a stream of 50 random numbers in the range 1 to 999, then filter the resulting stream elements to select only the odd numbers and display the results in...
-
(a) How many of male respondents in this study had some college degree? (b) How would you describe the largest group of respondents? (c) What could be stated about the differences between male and...
Study smarter with the SolutionInn App