Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: (a) Schematic of the experimental setup for heat transfer and pressure drop investigation in a microtube and (b) 3D drawing of measurement equipment mounting

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Schematic drawing of test section assembly

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Heat loss versus wall to ambient temperature difference for three test sections with different heating lengths

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Comparison of heat losses from the test section at different vacuum levels

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Test tube cross-section viewed from an optical microscope and the internal surface image obtained from a laser confocal scanning microscope, Ra = 0.8 μm

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Comparison of heat loss, qloss, normalized by the input heat, qin, as a function of Re at three different heating lengths

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Comparison of local net heat flux along the test tube with and without considering heat losses for Re = 4700 and Re = 2100

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: The comparison of viscous heating effect on Nu in turbulent flow region using laminar flow equation, Eq. (8), and turbulent flow equation, Eq. (9)

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: The variation of uncertainty in Nu as a function of Re at three heating lengths

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Comparison of friction factor data with theoretical predictions

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Comparison of experimental data for Nu for 962 diameter tube with available correlations after accounting for heat losses, viscous heating and axial conduction; inner diameter of microtube = 962 μm and Lh = 25 mm

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Comparison of Nu/Nuth with different heat loss correction equations, Eq. (8) based on laminar flow, and Eq. (9) based on turbulent flow

Date of download: 11/15/2017 Copyright © ASME. All rights reserved. From: Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction J. Heat Transfer. 2013;135(3):031703-031703-9. doi:10.1115/1.4007876 Figure Legend: Effect of axial heat conduction in laminar and turbulent regions and comparison of experimental data with Lin and Kandlikar [28] model