Please use this identifier to cite or link to this item: https://doi.org/10.1109/EPTC.2010.5702647
Title: Pressure drop characteristics and instabilities during flow boiling in parallel and oblique finned microchannels - A comparative study
Authors: Balasubramanian, K.
Seng, L.P. 
Hawlader, M.N.A. 
Shan, G.
Issue Date: 2010
Source: Balasubramanian, K., Seng, L.P., Hawlader, M.N.A., Shan, G. (2010). Pressure drop characteristics and instabilities during flow boiling in parallel and oblique finned microchannels - A comparative study. 2010 12th Electronics Packaging Technology Conference, EPTC 2010 : 273-278. ScholarBank@NUS Repository. https://doi.org/10.1109/EPTC.2010.5702647
Abstract: Experiments on flow boiling were conducted in parallel and oblique finned microchannels. The test vehicles were made from copper with a footprint area of 2.5cm x 2.5cm. The microchannels were formed by wire cut Electro Discharge Machining process and have surface roughness (Ra) of about 2.0 μm. Tests were performed on channels having width of 500 μm and a nominal aspect ratio of 3 over different mass velocity range and inlet temperature of 90°C. The impact of mass flux and heat flux on two-phase flow pressure drop and flow instability for deionized water is presented in this work for both parallel and oblique finned microchannels. It is observed that the pressure drop for a particular microchannel increases with the increase in applied heat flux for a fixed mass flux. In the oblique finned microchannel, for single phase fluid flow, the breakage of continuous fin into oblique sections causes the thermal boundary layers to be re-initialized at the leading edge of each oblique fin and reduces the boundary-layer thickness. This regeneration of the entrance effect causes the flow to be always in a developing state. In addition, the presence of the smaller oblique channels causes a fraction of the flow to branch into the adjacent main channels. Flow reversals caused by flow boiling instability in microchannel were compared for both the geometries. This work presents a first glimpse of the pressure drop performance of the oblique finned microchannel under flow boiling conditions and also explores its potential to mitigate or minimize the flow boiling instabilities in microchannel heat sinks. ©2010 IEEE.
Source Title: 2010 12th Electronics Packaging Technology Conference, EPTC 2010
URI: http://scholarbank.nus.edu.sg/handle/10635/73775
ISBN: 9781424485604
DOI: 10.1109/EPTC.2010.5702647
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

1
checked on Dec 6, 2017

Page view(s)

12
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.