units

MEC3451

Faculty of Engineering

# Monash University Handbook 2011 Undergraduate - Unit

### 6 points, SCA Band 2, 0.125 EFTSL

Refer to the specific census and withdrawal dates for the semester(s) in which this unit is offered.

 Level Undergraduate Faculty Faculty of Engineering Offered Clayton First semester 2011 (Day)Sunway First semester 2011 (Day) Coordinator(s) L Yeo (Clayton); Y M Hung (Sunway)

#### Synopsis

This unit expands upon concepts introduced in MEC2404 Control volume analysis is extended to consider Newton's second law of motion and the first and second laws of thermodynamics. Differential analysis leads to the development of the Navier-Stokes equations, and solution techniques for potential and viscous flows are introduced. The relationship of boundary layers to lift and drag is explored, theory of both turbomachinery and open-channel flow is consolidated, and the thermodynamics of insentropic compressible flows is described. The acoustic wave equation is derived, its and applications to sound intensity, noise control and the dB(A) weighting system are considered.

#### Objectives

To derive and solve the Navier-Stokes equations governing a fluid of boundary layers, and their contribution to lift and drag of Turbo-machinery equations of open channel flows and the hydraulic analogy of compressible flows, including isentropic flows of acoustics, including the wave equation, sound intensity and power, noise control, and dB(A) weightings Identify and derive calculable solutions to fluid mechanics problems from the Navier-Stokes equations Exploit knowledge of lift and drag characteristics of various geometries to improve the performance of objects in a flow Determine the free-surface wave speed and the effects of a hydraulic jump Calculate the fluid and thermodynamic properties across an isentropic shock Use the hydraulic analogy to develop compressible flow theories Determine the sound intensity and power of an acoustic source Calculate the absorption and attenuation of sound at a simple surface geometry An understanding of the need to, and benefits of, contributing as part of a team towards a common goal Appreciate the historical societal benefit of mechanical engineering applications of fluid mechanics.

#### Assessment

Practice classes: 10%
Assignment projects: 20%
Examination (3 hours): 70%

#### Contact hours

6 hours of contact time per week (usually 3 hours lectures and 3 hours practice sessions) and 6 hours of private study per week

#### Prerequisites

(ENG2091 and MEC2404) or (MEC2430 and (MAT2901 or MAT2902 or MTH2021 or MTH2032))