Please assist me for the complete derivation of this equation from the transport phenomena textbook(2nd revised edn)?
Fantastic news! We've Found the answer you've been seeking!
Question:
Please assist me for the complete derivation of this equation from the transport phenomena textbook(2nd revised edn)?
Specifically, how to get from equation 10.8-12 to 10.8-19?
Kindly refer to the photo attached for more details.
Appreciate your help on this.
Transcribed Image Text:
of the equation of motion. The term + u (dv.fər)² is the viscous heating, which we shall ne- glect in this discussion. The last term in the first bracket, corresponding to heat conduc- tion in the axial direction, will be omitted, since we know from experience that it is usually small in comparison with the heat convection in the axial direction. Therefore, the equation that we want to solve here is 1 a Эт på (10.8-12) Z,max R. dz r ar дr This partial differential equation, when solved, describes the temperature in the fluid as a function ofr and z. The boundary conditions are B.C. 1: at r = 0, T = finite (10.8-13) k OT 9o (constant) дr B.C. 2: at r = R, (10.8-14) B.C. 3: at z = 0, T = T1 (10.8-15) %3D We now put the problem statement into dimensionless form. The choice of the dimen- sionless quantities is arbitrary. We choose T- T1 9oR/k (10.8-16, 17, 18) %3D PC,02,maxR² /k Generally one tries to select dimensionless quantities so as to minimize the number of parameters in the final problem formulation. In this problem the choice of = r/R is a natural one, because of the appearance ofr/R in the differential equation. The choice for the dimensionless temperature is suggested by the second and third boundary condi- tions. Having specified these two dimensionless variables, the choice of dimensionless axial coordinate follows naturally. The resulting problem statement, in dimensionless form, is now 1 a до (1 – 2) d0 (10.8-19) with boundary conditions B.C. 1: at = 0, O = finite (10.8-20) %3D B.C. 2: at = 1, 3D1 (10.8-21) %3D B.C. 3: at = 0, (10.8-22) %3D %3D The partial differential equation in Eq. 10.8-19 has been solved for these boundary condi- tions, but in this section we do not give the complete solution. It is, however, instructive to obtain the asymptotic solution to Eq. 10.8-19 for large §. After the fluid is sufficiently far downstream from the beginning of the heated section, one expects that the constant heat flux through the wall will result in a rise of the fluid temperature that is linear in g. One further expects that the shape of the temperature pro- files as a function of g will ultimately not undergo further change with increasing (see Fig. 10.8-3). Hence a solution of the following form seems reasonable for large 5: 3 O(E, 5) = Co5 + V(E) (10.8-23 in which Co is a constant to be determined presently. of the equation of motion. The term + u (dv.fər)² is the viscous heating, which we shall ne- glect in this discussion. The last term in the first bracket, corresponding to heat conduc- tion in the axial direction, will be omitted, since we know from experience that it is usually small in comparison with the heat convection in the axial direction. Therefore, the equation that we want to solve here is 1 a Эт på (10.8-12) Z,max R. dz r ar дr This partial differential equation, when solved, describes the temperature in the fluid as a function ofr and z. The boundary conditions are B.C. 1: at r = 0, T = finite (10.8-13) k OT 9o (constant) дr B.C. 2: at r = R, (10.8-14) B.C. 3: at z = 0, T = T1 (10.8-15) %3D We now put the problem statement into dimensionless form. The choice of the dimen- sionless quantities is arbitrary. We choose T- T1 9oR/k (10.8-16, 17, 18) %3D PC,02,maxR² /k Generally one tries to select dimensionless quantities so as to minimize the number of parameters in the final problem formulation. In this problem the choice of = r/R is a natural one, because of the appearance ofr/R in the differential equation. The choice for the dimensionless temperature is suggested by the second and third boundary condi- tions. Having specified these two dimensionless variables, the choice of dimensionless axial coordinate follows naturally. The resulting problem statement, in dimensionless form, is now 1 a до (1 – 2) d0 (10.8-19) with boundary conditions B.C. 1: at = 0, O = finite (10.8-20) %3D B.C. 2: at = 1, 3D1 (10.8-21) %3D B.C. 3: at = 0, (10.8-22) %3D %3D The partial differential equation in Eq. 10.8-19 has been solved for these boundary condi- tions, but in this section we do not give the complete solution. It is, however, instructive to obtain the asymptotic solution to Eq. 10.8-19 for large §. After the fluid is sufficiently far downstream from the beginning of the heated section, one expects that the constant heat flux through the wall will result in a rise of the fluid temperature that is linear in g. One further expects that the shape of the temperature pro- files as a function of g will ultimately not undergo further change with increasing (see Fig. 10.8-3). Hence a solution of the following form seems reasonable for large 5: 3 O(E, 5) = Co5 + V(E) (10.8-23 in which Co is a constant to be determined presently.
Expert Answer:
Related Book For
Modeling the Dynamics of Life Calculus and Probability for Life Scientists
ISBN: 978-0840064189
3rd edition
Authors: Frederick R. Adler
Posted Date:
Students also viewed these chemical engineering questions
-
Required: COMPLETE an S-corporation tax return. See data below. You will need the following forms: Form 1120S and corresponding schedules, including Schedules L and M-1 Schedule K-1 for Herman...
-
This is on the transport phenomena revised 2nd edition textbook on forced convection topic. Can anyone provide step by step solution to get from equation 10.8-12 to 10.8-19? of the equation of...
-
Summarize your year-to-year financial analysis results in a table. 2015 2016 2017 2018 2019 2020 ROA UA Nike Adidas ROE UA Nike Adidas Revenue UA Growth Nike Adidas Net UA income Growth Nike Adidas...
-
Nu-Look Design, Inc., operated as a residential home improvement company. During calendar years 1996, 1997, and 1998, Ronald A. Stark not only was Nu-Looks sole shareholder and president but also...
-
WMEJ is an independent television station run by a major state university. The station's broadcast hours vary during the year depending on whether the university is in session. The station's...
-
What advantage does the sign test have over the Wilcoxon signed-rank test?
-
Stone Brewing Co. is a San Diego brewer that has sold its beers for over two decades. Stone has maintained its trademark and brand from the beginning, registering the STONE mark in 1998. Stone has...
-
In September 2009, The Walt Disney Company announced that it would acquire Marvel Entertainment in a $4 billion cash and common stock deal. On a per-share basis, the consideration given by Disney to...
-
Which data model provides a user with the best "program-data independence"? A. Hierarchial Model B. Network Model C. Relational Model D. Entity Relationship Model Why?
-
Launched in 1937, Krispy Kreme Doughnuts is a branded specialty retailer of premium doughnuts. Its Original Glazed doughnut is the firm's most recognizable product. However, Krispy Kreme's commitment...
-
A client is considering two investments: 1) a portfolio with a return = 12% and risk =25%; and 2) US Treasury Bills with a return =5%. What risk aversion coefficient (A) would make the client...
-
Hulu announced a price increase for their ad-free plan from $11.99 to $12.99 monthly. The ad-supported plan will increase in price from $5.99 to $6.99 monthly. This price increase will not affect the...
-
For this discussion, you are welcome to choose any topic of interest to you. Choose a source from the library's databases page. Run a broad search in the database and notice the number of results...
-
1.A person is a lobster fisherwoman and spends $50 a year on purchasing 5 kilos of lobster at a store in 2010 ( the base year) and spends $60 a year on purchasing 4 kilos of lobster at a store in...
-
In this assignment, you are asked to complete a Java program that finds the shortest path that a hare needs to take to go through a grid-shape maze. The hare enters the maze from a specific square...
-
Housing developments in Salt Lake City. Landlords across the country are competing to keep tenants, especially at new buildings. When Tressy Coats looked to rent a somewhat worn-out, three-bedroom...
-
What would you add to the list of six traits that is missing? What trait is important to the way you view leadership?
-
Discuss the concept of the looking-glass self. how do you think others perceive you? do you think most people perceive you correctly?
-
The p.d.f. is g(t) = 6t(1 - t) for 0 t 1. Find the probability that the measurement is between 0.5 and 0.8. Find the probability in two ways: a. By integrating the given p.d.f. b. By using the...
-
Suppose that r = 1.5 and h = 1.0 106 bacteria. A lab is growing and harvesting a culture of valuable bacteria described by the discrete-time dynamical system bt + 1 = rbt - h. The bacteria have per...
-
Which function approaches 0 faster as x approaches infinity: e-x or 1/x? Many improper integrals can be evaluated by comparing functions with the method of leading behavior. State which of the given...
-
Form groups of five. Each group will analyze recent cases of terrorist attacks where expatriates were the target. Each team will present its findings to the entire class for approximately 10 minutes,...
-
If you were asked to design a set of incentives to induce expatriates to accept an assignment in a risky area, how would you set this up? And once the expatriate accepts the assignment, how would you...
-
Do some research to learn why many multinationals prefer to send expatriates overseas rather than hire locals in dangerous areas. Based on your research, what are the advantages and disadvantages of...
Study smarter with the SolutionInn App