Experiments are performed to study the flow structure and heat transfer over a heated cylinder oscillating radially with small amplitude in streamwise direction. Both flow visualization using a smoke wire in the upstream and the local heat transfer measurements based on wall temperatures around the cylinder were made. The excitation frequencies of the cylinder are selected at 0.5, 1, 1.5, 2, 2.5, and 3. The oscillation amplitude selected is less than a threshold value of where synchronization of vortex shedding with the cylinder excitation was not expected. However, experiments indicate that synchronization still occurs which stimulates a great interest to study its enhancement in the heat transfer. Synchronization occurred at is antisymmetric vortex formation while synchronization at and 3 is symmetric type. The forward motion (advancing into the cross flow) of the cylinder during one cycle of oscillation has an effect to suppress the instability and the vortex formation. This leads to the occurrence of a smaller and symmetric vortex formation and a less enhancement of heat transfer than the case of antisymmetric type For excitations at lower frequencies all the vortex formations occurred are mostly antisymmetric. The dominant mode of the instability in the shear layer is actually the natural shedding frequency of the vortex. A closer excitation frequency to causes a greater enhancement in the heat transfer. During the experiments, the Reynolds numbers varies from 1600 to 3200, the dimensionless amplitude from 0.048 to 0.016.
Skip Nav Destination
e-mail: gauc@mail.ncku.edu.tw
Article navigation
Technical Papers
Synchronization of Vortex Shedding and Heat Transfer Enhancement Over a Heated Cylinder Oscillating With Small Amplitude in Streamwise Direction
C. Gau,
e-mail: gauc@mail.ncku.edu.tw
C. Gau
Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, R.O.C
Search for other works by this author on:
S. X. Wu,
S. X. Wu
Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, R.O.C
Search for other works by this author on:
H. S. Su
H. S. Su
Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, R.O.C
Search for other works by this author on:
C. Gau
Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, R.O.C
e-mail: gauc@mail.ncku.edu.tw
S. X. Wu
Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, R.O.C
H. S. Su
Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, R.O.C
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division March 27, 2000; revision received November 3, 2000. Associate Editor: B. Chung
J. Heat Transfer. Dec 2001, 123(6): 1139-1148 (10 pages)
Published Online: November 3, 2000
Article history
Received:
March 27, 2000
Revised:
November 3, 2000
Citation
Gau, C., Wu , S. X., and Su, H. S. (November 3, 2000). "Synchronization of Vortex Shedding and Heat Transfer Enhancement Over a Heated Cylinder Oscillating With Small Amplitude in Streamwise Direction ." ASME. J. Heat Transfer. December 2001; 123(6): 1139–1148. https://doi.org/10.1115/1.1404121
Download citation file:
Get Email Alerts
Cited By
Entropic Analysis of the Maximum Output Power of Thermoradiative Cells
J. Heat Mass Transfer
Molecular Dynamics Simulations in Nanoscale Heat Transfer: A Mini Review
J. Heat Mass Transfer
Related Articles
Wake Topology of a Cylinder Undergoing Vortex-Induced Vibrations With Elliptic Trajectories
J. Fluids Eng (May,2016)
Experimental Surface Heat Transfer and Flow Structure in a Curved Channel With Laminar, Transitional, and Turbulent Flows
J. Turbomach (July,2004)
Heat Transfer for a Turbine Blade With Nonaxisymmetric Endwall Contouring
J. Turbomach (January,2011)
The Effect of Free Surface on the Vortex Shedding From Inclined Circular Cylinders
J. Fluids Eng (February,2008)
Related Proceedings Papers
Related Chapters
Vortex-Induced Vibration
Flow Induced Vibration of Power and Process Plant Components: A Practical Workbook
Assessment of Remote Cavitation Detection Methods with Flow Visualization in a Full Scale Francis Turbine
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
In-Nozzle Flow Visualization of Marine Diesel Injector Nozzles with Different Inlet Radii
Proceedings of the 10th International Symposium on Cavitation (CAV2018)