1. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Schematic diagram of the experimental apparatus Figure Legend:

2. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Sketch of the annular duct cross section showing positions of thermocouples and foil gaps Figure Legend:

3. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Representative wall temperature measurements along the annulus for different eccentricities; ○, ◇, and □ denote the readings of thermocouples S0i, S90i, and S180i, respectively, whereas +, ×, and are for the corresponding thermocouples on the outer cylinder; Re = 2800 Figure Legend:

4. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Azimuthal temperature variation for the inner (a) and outer (b) cylinders at z/H = 0.5; e = 0 (), 0.1 (□), 0.3 (×), 0.5 (+), 0.7 ( ◇ ), 0.8 (○) and 0.9 (♦); Re = 2800 Figure Legend:

5. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Azimuthally averaged temperature variation along the annulus for various eccentricities and Reynolds numbers (symbols are the same as in Fig. 4) Figure Legend:

6. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Circumferentially averaged wall temperature rise at z/H = 0.5; □: Re = 1500, ▿ : Re = 2800, ◇ : Re = 5700; △ : natural convection measurements by CT at Re ≈ 900. Smooth lines approaching constant asymptotes at e = 0 and 1 have been fitted to all data sets. Figure Legend:

7. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Ratio of Richardson number to the Richardson number for natural convection at the same eccentricity for concentric (○) and highly eccentric ( △ ; e = 0.9) annular channels at midheight Figure Legend:

8. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Application of the Jackson and Hall criterion (dashed line) to test the influence of buoyancy forces on the heat transfer coefficient in concentric (●) and highly eccentric ( ▴ ; e = 0.9) annular channels at midheight; open symbols represent corresponding natural convection measurements by CT Figure Legend:

9. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Azimuthal variation of the local Nusselt number for the inner (a) and outer (b) cylinders at z/H = 0.5; e = 0 (), 0.1 (□), 0.3 (×), 0.5 (+), 0.7 ( ◇ ), 0.8 (○) and 0.9 (♦); Re = 2800 Figure Legend:

10. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Azimuthally averaged Nusselt number versus eccentricity at z/H = 0.5, □; Re = 1500, ▿ ; Re = 2800, ◇ ; Re = 5700, △ : natural convection measurements by CT at Re ≈ 900. Smooth lines approaching constant asymptotes at e = 0 and 1 have been fitted to all data sets; uncertainty bars have been drawn for the concentric case results, as representative of all results. Figure Legend:

11. Date of download: 6/25/2016 Copyright © ASME. All rights reserved. From: An Experimental Study of Mixed Convection in Vertical, Open-Ended, Concentric and Eccentric Annular Channels J. Heat Transfer. 2013;135(7):072502-072502-9. doi:10.1115/1.4023748 Nusselt number versus Reynolds number at z/H = 0.5; closed symbols correspond to present results, whereas open symbols correspond to natural convection; circles denote concentric cases, whereas triangles denote highly eccentric (e = 0.9) cases; solid lines: exponential curves fitted to the present data; dashed line: laminar flow in pipes; dotted line: El-Genk and Rao correlation; dash and dot line: Dittus–Boelter correlation; uncertainty bars have been drawn for the concentric case results. Figure Legend: