Heat transfer enhancement in a straight channel via a rotationally oscillating adiabatic cylinder

Ali Beskok*, Mehrdad Raisee, Bayram Celik, Bedri Yagiz, Mohsen Cheraghi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Heat convection from the uniformly heated walls of a straight channel in presence of a rotationally oscillating cylinder (ROC) is simulated at Re = 100. Heat transfer enhancement due to vortex shedding from the ROC is investigated. Systematic studies are performed to explore the rotation angle and frequency influences on heat transfer by varying the latter in range of the lock-in regime and the former from 0 to 2π/3. All simulation results are based on the numerical solutions of two-dimensional, unsteady, incompressible Navier-Stokes and energy equations using an h/p type finite element algorithm. Considering time periodicity of the resulting flow and temperature fields, time averaged wall Nusselt number is reported to quantify the heat transfer enhancement for Pr = 0.1, 1.0, 5.0 and 10.0 fluids. Performance analyses of the ROC device based on its total power consumption and heat transfer enhancement are also presented.

Original languageEnglish
Pages (from-to)61-69
Number of pages9
JournalInternational Journal of Thermal Sciences
Volume58
DOIs
Publication statusPublished - Aug 2012

Keywords

  • Internal flow
  • Lock-in regime
  • Time periodic flow and heat transfer
  • Vortex dynamics

Fingerprint

Dive into the research topics of 'Heat transfer enhancement in a straight channel via a rotationally oscillating adiabatic cylinder'. Together they form a unique fingerprint.

Cite this