HW 1 Solution

HW 1 Solution - ME 309 Fall 2008 Section 2 (Merkle)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ME 309 Fall 2008 Section 2 (Merkle) Homework # 1 Due Wed 27 Aug 2008 Problem 1-1. Using Appendix A in the text, find values for the following fluid properties. Express all answers in terms of SI units, using kg/m 3 for density and kg/m-s for viscosity. Find : a ) The minimum allowable viscosity of SAE 20W oil at -10 C ; (Note: The middle column of Table A.5, pg 705 gives the dynamic viscosity of oil, μ , but the two right columns give the kinematic viscosity, ν . These two quantities are related to each other by the fluid density, ρ as: ν = μ / ρ ). b ) The minimum allowable dynamic viscosity of SAE 20W oil at 100 Ci For the density of oil, use ρ = 820 kg/m 3 . c ) The density and dynamic viscosity of water at 5 C ; d ) The density and dynamic viscosity of water at 95 C ; e ) The density and dynamic viscosity of air at 5 C at atmospheric pressure; f ) The density and dynamic viscosity of air at 95 C ; g ) From a through f , what major differences do you observe between oil, water and air? (Note air and water are two of the most common fluids of interest for both practical and engineering reasons.) h ) Find the units of the product of density times velocity (measured in m/s ) times a length (measured in m ) divided by dynamic viscosity; Solution: a ) Find : The minimum allowable viscosity of SAE 20W oil at -10 C ; Answer : From Table A.5, p 705, SAE 20W oil must have a viscosity greater than or
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

HW 1 Solution - ME 309 Fall 2008 Section 2 (Merkle)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online