NUCL 2860 - 2019F - A8_solutions.docx - NUCL 2860U Fluid Mechanics Assignment 8 Viscous Flow in Pipes P2 External Flow Solutions Problem Analysis

# NUCL 2860 - 2019F - A8_solutions.docx - NUCL 2860U Fluid...

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NUCL 2860U: Fluid Mechanics Assignment 8: Viscous Flow in Pipes, P2 & External Flow Solutions Problem Analysis / 9 Knowledge Base / 3 Total / 12 1. A video of turbulent flow through a deformed CANDU fuel channel is provided on Blackboard. Use this video to answer the following questions: a. Does the flow appear to be laminar or turbulent? b. Using terminology given in Chapter 9, describe the flow past the spacer pads. c. Why do you think the fluid velocity is generally higher through the bundle in comparison to the average velocity before and after the bundle? Solution: a) The flow is turbulent, as evidenced by the large changes in velocity with respect to time. b) Spacer pads are appended to the fuel elements at the midplane. These pads are intentionally oriented at an angle to one another (to ensure spacing between adjacent fuel elements). As the water approaches the spacer pads, there is a low-velocity region immediately downstream (i.e., the wake). This low-velocity region appears to flicker, which indicates high local regions of

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