Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/104714
Title: Steady and pulsating flow past a heated rectangular cylinder(s) in a channel
Authors: Saxena, Ashish
Ng, Eddie Yin Kwee
Keywords: Pulsating Flow
Cylinder
Engineering::Mechanical engineering
Issue Date: 2017
Source: Saxena, A., & Ng, E. Y. K. (2017). Steady and pulsating flow past a heated rectangular cylinder(s) in a channel. Journal of Thermophysics and Heat Transfer, 32(2), 401-413. doi:10.2514/1.T5265
Series/Report no.: Journal of Thermophysics and Heat Transfer
Abstract: In the present study, the effect of laminar steady (Re=100, Pr=0.74) and pulsating flow (4 Hz and amplitude 0.4) is numerically studied over a centrally located heated rectangular cylinder of varying aspect ratio (W/H=1 to 8) in a confined channel using finite volume method. To study the influence of channel walls at a fix distance, eccentric placement of the highest aspect ratio cylinder(s) with two gap ratios (B/H) of 5 and 0.5 is done. Isotherms and streamlines of the flow are presented along with lift and drag coefficients. Further, fast Fourier transform (FFT) spectral analysis is performed to evaluate the vortex shedding frequency of the flow upon interaction with the cylinder(s). For single cylinder at the center position in the channel, natural vortex shedding and “lock-on” shedding occurs for lower-aspect-ratio cylinder under steady and pulsating flow, respectively. An increase in aspect ratio has a suppressing effect on the vortex shedding with a substantial decrease in the heat transfer over the cylinder. Placing two cylinders (W/H=8) at a geometrically symmetrical eccentric location of B/H=5 shows an extra peak at half of the flow inlet frequency in FFT spectral curve that possibly confirms the lock-on shedding with increased heat transfer over the cylinder.
URI: https://hdl.handle.net/10356/104714
http://hdl.handle.net/10220/49513
ISSN: 0887-8722
DOI: 10.2514/1.T5265
Rights: © 2017 American Institute of Aeronautics and Astronautics, Inc.. All rights reserved. This paper was published in Journal of Thermophysics and Heat Transfer and is made available with permission of American Institute of Aeronautics and Astronautics, Inc.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

Files in This Item:
File Description SizeFormat 
Steady and pulsating flow past a heated rectangular cylinder(s) in a channel.pdf2.55 MBAdobe PDFThumbnail
View/Open

SCOPUSTM   
Citations 20

4
Updated on Mar 3, 2021

PublonsTM
Citations 20

6
Updated on Mar 7, 2021

Page view(s)

124
Updated on Jan 24, 2022

Download(s) 50

64
Updated on Jan 24, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.