# TURBULENCE - 2022/3

Module code: ENGM249

## Module Overview

This module builds on earlier modules in aerodynamics and computational fluid dynamics. The module provides an introduction to the physics of turbulent flows, their prediction and experimental study. Practice is covered through CFD case studies and a related assignment.

### Module provider

Mechanical Engineering Sciences

BIRCH David (Mech Eng Sci)

### Module cap (Maximum number of students): N/A

Independent Learning Hours: 87

Lecture Hours: 20

Tutorial Hours: 5

Laboratory Hours: 18

Captured Content: 20

Semester 1

## Prerequisites / Co-requisites

Either ENG3210 Computational Fluid Dynamics or ENG3165 Numerical Methods and CFD

## Module content

Indicative content includes:

Turbulence: introduction, laminar flow, transition, definitions; Navier-Stokes equations, Reynolds stresses, turbulence energy; structure of turbulence and turbulent flows; the turbulent boundary layer

Turbulence modelling: the closure problem; one- and two-equation turbulence models; introduction to advanced models, large-eddy simulation (LES) and direct numerical simulation (DNS)

Computational fluid dynamics (CFD): application of turbulence models, physical and computational implications; case studies

Experimental techniques: wind tunnels and anemometry

## Assessment pattern

Assessment type Unit of assessment Weighting
Coursework CFD ASSIGNMENT 40
Examination Online FINAL EXAMINATION 60

N/A

## Assessment Strategy

The assessment strategy is designed to provide students with the opportunity to demonstrate

understanding of the scientific principles, and mathematical methodologies used in the study of turbulence. The CFD coursework element allows students to demonstrate that they can interpret a problem, conduct a CFD analysis at the level used in the aerospace industry, and present a report of the solution clearly and accurately.

Thus, the summative assessment for this module consists of:

·         CFD assignment        [ Learning outcomes 3, 4 ]

·         Examination               [ Learning outcomes 1, 2, 3, 4, 5 ]

Formative assessment and feedback

• Formative verbal feedback is given in tutorials

• Written feedback is given on the CFD assignment

## Module aims

• provide a general understating of turbulence and the nature and structure of turbulent flows
• introduce turbulence modelling and its application in CFD, including practical experience in its use
• introduce experimental techniques for investigating turbulent flows

## Learning outcomes

 Ref Attributes Developed 001 Demonstrate a comprehensive understanding of the general features of turbulent flows and modelling methods K M1, M2, M3 002 Describe the origin and significance of Reynolds stresses and associates properties KC M1, M2 003 Demonstrate understanding of the basis of the ¿closure problem' and its resolution through turbulence modelling KC M1, M2, M3 004 Be able to use basic turbulence models in CFD and be aware of advanced models and their strengths/weaknesses KCPT M2, M3, M4, M12, M13 005 Demonstrate awareness of experimental techniques for investigating turbulent flows KCP M5, M13, M15

Attributes Developed

C - Cognitive/analytical

K - Subject knowledge

T - Transferable skills

P - Professional/Practical skills

## Methods of Teaching / Learning

The learning and teaching strategy is designed to introduce the basic principles of turbulence through theory with worked examples. This is delivered principally through lectures and tutorial classes. Practice is covered through CFD case studies and a CFD assignment solving a basic aerospace test case.

Indicated Lecture Hours (which may also include seminars, tutorials, workshops and other contact time) are approximate and may include in-class tests where one or more of these are an assessment on the module. In-class tests are scheduled/organised separately to taught content and will be published on to student personal timetables, where they apply to taken modules, as soon as they are finalised by central administration. This will usually be after the initial publication of the teaching timetable for the relevant semester.