Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Integral transverse rib roughness in a circular duct

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: (a) Full-length twisted-tape (without oblique teeth) insert inside a duct, (b) full-length twisted-tape with oblique teeth, and (c) detail A of Fig. 1(b)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Schematic diagram of the experimental rig

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Validation of the experimental setup: comparison of present experimental friction factor data with plain circular tube data

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Validation of the experimental setup: comparison of present experimental Nusselt number data with plain circular tube data

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Effect of tooth horizontal length and the tooth angle of the twisted-tape oblique teeth; y = 2.5, P/e = 2.0437, and e/Dh = 0.07692 (friction factor)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Effect of rib pitch, y = 2.5, thl = 0.05263, ⊖ = 30 deg, and e/Dh = 0.07692 (friction factor)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Effect of rib height, y = 2.5, thl = 0.1053, ⊖ = 60 deg, and P/e = 5.6481 (friction factor)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Comparison of present experimental friction factor data with the correlation, Eq. (2) (P/e = 5.6481)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Effect of tooth horizontal length and the tooth angle of the twisted-tape oblique teeth; y = 2.5, P/e = 2.0437, and e/Dh = 0.07692 (Nusselt number)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Effect of rib height, y = 2.5, thl = 0.1053, ⊖ = 60 deg, and P/e = 5.6481 (Nusselt number)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Effect of rib pitch, y = 2.5, thl = 0.05263, ⊖ = 30 deg, and e/Dh = 0.07692 (Nusselt number)

Date of download: 12/24/2017 Copyright © ASME. All rights reserved. From: Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes J. Thermal Sci. Eng. Appl. 2015;7(4):041009-041009-9. doi:10.1115/1.4030792 Figure Legend: Comparison of present experimental Nusselt number data with correlation, Eq. (5) (P/e = 5.6481)