CONTENTS
1.Introduction 1
1.1.Background 1
1.2.Purpose statement 2
1.3.Research question 2
1.4.Research objectives 2
1.5.Significance of the study 2
1.6 Scope 2
1.7.Limitations 3
2.Literature Review 3
2.1 Analytical and empirical models 3
2.2 Small-scale and full-scale experimental models 3
2.3 Multi-zone and numerical models 4
2.4.Computer fluid dynamics (CFD) 4
2.5.Water-table studies 4
2.6.Learning from the literature review 5
3.Research Methodology 6
3.1.Overview 6
3.2.Experimental Setup 6
3.3.Experimentation of different model scales 8
3.4.Testing of current methodology for different speeds 9
3.5.Testing of current methodology for ACH 9
3.6.Photographic data analysis for deriving ventilation metrics 10
3.7.Extracting Pixel values 10
3.8.Establishing relationship between pixel values and dye concentration 10
3.9.Ventilation metrics 13
3.6.1Percentage of dead spots (% DS) 13
3.6.2Absolute ventilation efficiency (Ea) 13
3.6.3Air Changes per Hour (ACH) 13
3.6.4Ventilation metric calculation 15
4.Results and discussion 16
4.1.Flow patterns for different configurations using 1:20 Scale 16
4.2.Effect of model scale 18
4.3.Dead Spots (DS) 19
4.4.Absolute Ventilation Efficiency (Ea) 23
4.5.Air Change per Hour (ACH) 25
4.6.Effect of speed at 1:20 scale 27
5. Conclusions 28
6. Learnings and Recommendations for future study 29
6.1.Learnings from the experiment 29
6.2.Recommendations 29
7 References 30
Appendix A1 I
Appendix A2 II
Appendix B III
Appendix C IV
Appendix D VI
Appendix E IX