Flow Visualization and Local Measurement of Forced Convection Heat Transfer in a Microtube-Reference-Cited by-同舟云学术

Flow Visualization and Local Measurement of Forced Convection Heat Transfer in a Microtube

Published:2010-01-04 Issue:3 Volume:132 Page:
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Schilder Boris¹,Man Simon Yu Ching²,Kasagi Nobuhide³,Hardt Steffen⁴,Stephan Peter¹

Affiliation:

1. Department of Mechanical Engineering, Technische Universitaet Darmstadt, Petersenstrasse 30, 64287 Darmstadt, Germany

2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

3. Department of Mechanical Engineering, University of Tokyo, Tokyo 113-8656, Japan

4. Center of Smart Interfaces, Technische Universitaet Darmstadt, Darmstadt D-64287, Germany

Abstract

The pressure drop and the convective heat transfer characteristics of ethanol and water in a circular tube with a diameter of 600 μm with and without phase change have been studied experimentally. The test section consists of a glass tube coated with a transparent indium tin oxide heater film. For single-phase liquid flow (including superheated liquid) it was found that the measured Nusselt numbers and friction factors are in good agreement with the theoretical values expected from Poiseuille flow. Subsequently, the boiling heat transfer of ethanol was studied. It was found that boiling with bubble growth in both upstream and downstream directions leaving behind a thin evaporating liquid film on the tube wall is the dominant phase change process. Wavy patterns on the film surface indicate shear forces between vapor and liquid phase during slug flow. Temporary dryout phenomena occur even at a low mean vapor quality due to film rupture as a result of film instabilities. Local Nusselt numbers are calculated for the two-phase flow at different heat fluxes and Reynolds numbers. Compared with single-phase flow the heat transfer is enhanced by a factor of 3–8.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/doi/10.1115/1.4000046/5690344/031702_1.pdf

Reference35 articles.

1. A Comparative Analysis of Studies on Heat Transfer and Fluid Flow in Microchannels;Sobhan;Microscale Thermophys. Eng.

2. Heat Transfer in Microchannels;Palm;Microscale Thermophys. Eng.

3. Single-Phase Convective Heat Transfer in Microchannels: A Review of Experimental Results;Morini;Int. J. Therm. Sci.

4. The Experimental Research on Microtube Heat Transfer and Fluid Flow of Distilled Water;Lelea;Int. J. Heat Mass Transfer

Cited by 21 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. Controlling gas–liquid flow and enhancing heat transfer in a T-junction microchannel by wettability-engineered walls;Physics of Fluids;2024-02-01

2. A review on microchannel heat exchanger and the effects of various parameters;3RD INTERNATIONAL CONFERENCE OF BIO-BASED ECONOMY FOR APPLICATION AND UTILITY;2023

3. Numerical investigation of flow boiling in manifold microchannel-based heat exchangers;International Journal of Heat and Mass Transfer;2020-12

4. A study on thermohydraulic characteristics of fluid flow through microchannels;Journal of Thermal Analysis and Calorimetry;2019-09-19

5. Multiphase fluid flow and heat transfer characteristics in microchannels;Chemical Engineering Science;2017-09