HW 2 - p 3.32 - Dissolution of a Benzoic Acid Tube in Turbulent Flow- 7 pts
Water at 25oC flows at 5ft/s through a straight, cylindrical tube cast from benzoic acid, of 2-in. inside diameter. If the tube is 10 ft long, and fully developed, turbulent flow is assumed, estimate the average concentration of benzoic acid in the water leaving the tube. Physical properties are given in Example 3.15.
posted by Dr. B at 2:22 PM
4 Comments:
Where can we find the Prandtl analogy?
???? at 5:59 PM:
I did not realize that the Prandtl Analogy was removed from the textbook in this edition ! So, you win. You do not need to do the Prandtl Analogy part of this problem ! I apologize for the confusion.
Is the equation given in the hints supposed to be used to get eddy diffusion? Also would it be right to assume that we only needed solver for the Prandtl method because I was able to estimate f without solver.
Anon 9:49 PM:
No, you do not need to evaluate eddy diffusion.
You can use the eqn in the hints to determine the Fanning friction factor, f. It might be easier to use eqn 3-174 from your textbook. You need f in the Reynolds Analogy to evaluate kc.
Yes, if you use eqn 3-174 to get f, you only need solver for Prandtl (which you do not need to do).
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