Example Solutions Homework 11

2 k the formulation would appear as follows therefore

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: herefore, ∆ , , Problem: Oil with a kinematic viscosity of 4x10-6 m2/s flows through a smooth pipe 15 cm in diameter at 2 m/s. What velocity should water have at 20°C in a smooth pipe 5cm in diameter to be dynamically similar? Given: D15 = 15cm, v15 = 2m/s D5 = 5 cm Equations and Assumptions: To be dynamically similar, match Reynold's number: Re5 = Re15 Oil (20°C): viscosity, v15 = 4x10-6 m2/s Water (20°C): viscosity, v5 = 1x10-6 m2/s Solution: Re5 = Re15 v v v v v 2⁄ 15 3 . ⁄ 1 10 4 10 Problem: Given the wooden flume below, compute the area, wetted perimeter, hydraulic radius and flow if the bed slopes at 0.0015. Equations and Assumptions: → 1 2 2 →2 1 For a wooden flume, n = 0.012 Solution: 1 45° 1 2 1 2 1.4142 1 0.5 1.4142 0.5 2.83 1 0.5 0.012 2.83 0.177 0.177 0.0015 . Problem: For the cross-section below, find the critical depth if the flow the the section is 0.2m3/s and the base of the section is 2.0m. y 2.0 m Equations and Assumptions: 0.2 ⁄ 9.81 , Solution: 2.0 2.0 0.04 39.24 . ⁄ ⁄ ⁄ 0.00102 1...
View Full Document

Ask a homework question - tutors are online