Heat transfer enhancement of channel flow via vortex-induced vibration of flexible cylinder

Junxiang Shi, Jingwen Hu, Steven R. Schafer, Chung-Lung Chen*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Thermal diffusion in a developed thermal boundary layer is considered as an obstacle for improving the forced convective heat transfer rate of a channel flow. In this work, a novel, self-agitating method that takes advantage of vortex-induced vibration (VIV) is introduced to disrupt the thermal boundary layer and thereby enhance the thermal performance. A flexible cylinder is placed at the centerline of a rectangular channel. The vortex shedding due to the cylinder gives rise to a periodic vibration of the cylinder. Consequently, the flow-structure-interaction (FSI) strengthens the disruption of the thermal boundary layer by vortex interaction with the walls, and improves the mixing process. This new concept for enhancing the convective heat transfer rate is demonstrated by a threedimensional modeling study at different Reynolds numbers (84~168). The fluid dynamics and thermal performance are analyzed in terms of vortex dynamics, temperature fields, local and average Nusselt numbers, and pressure loss. The channel with the self-agitated cylinder is verified to significantly increase the convective heat transfer coefficient. When the Reynolds number is 168, the channel with the VIV improves the average Nu by 234.8% and 51.4% as opposed to the clean channel and the channel with a stationary cylinder, respectively.

Original languageEnglish
Title of host publicationSymposia
Subtitle of host publicationFluid Machinery; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791846223
DOIs
StatePublished - 1 Jan 2014
EventASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels - Chicago, United States
Duration: 3 Aug 20147 Aug 2014

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
Volume1B
ISSN (Print)0888-8116

Conference

ConferenceASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels
CountryUnited States
CityChicago
Period3/08/147/08/14

Keywords

  • Convection heat transfer enhancement
  • Flow structure interaction
  • Modeling simulation
  • Passive flow control
  • Vortex dynamics
  • Vortex shedding
  • Vortex-induced vibration

Fingerprint Dive into the research topics of 'Heat transfer enhancement of channel flow via vortex-induced vibration of flexible cylinder'. Together they form a unique fingerprint.

Cite this