Onset of Nucleate Boiling and Critical Heat Flux with Boiling Water in Microchannels

Bhide, R R and Singh, Shiv Govind and Duryodhan, V S and Sridharan, A and Agrawal, A (2015) Onset of Nucleate Boiling and Critical Heat Flux with Boiling Water in Microchannels. International Journal of Microscale and Nanoscale Thermal, 4 (1). pp. 25-47. ISSN 1949-4955

ijmntffp_CHF.pdf - Published Version

Download (728kB) | Preview


This paper focuses on experimental determination of onset of nucleate boiling (ONB) and critical heat flux (CHF) at the microscales, and comparison of these with available correlations. The working fluid is deionised water and microchannel of four different hydraulic diameters: 65, 70, 107 and 125 m, have been tested. Effect of hydraulic diameter (65-125 m), mass flux (60-1410 kg/m2s) and heat flux (0-910 kW/m2) on ONB and CHF has been studied in detail. The heat flux for onset of nucleate boiling increases with hydraulic diameter and mass flux. The critical heat flux tends to increase with a decrease in hydraulic diameter and with increasing mass flux. The effect of surface roughness on CHF has also been tested to a limited extent; no clear change in the CHF value was observed upon changing the surface roughness by an order of magnitude. The empirical correlations tested in this study predict the experimental data to varying extent. These results may help better determine the lower and upper limits of heat flux while designing heat sink for electronic cooling.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Singh, Shiv Govindhttp://orcid.org/0000-0001-7319-879X
Item Type: Article
Additional Information: We are grateful to Mr. Anshul Jain for some initial calculations.
Uncontrolled Keywords: Two phase flow, ONB, CHF, Boiling incipience
Subjects: Others > Electricity
Others > Engineering technology
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 31 Mar 2016 10:18
Last Modified: 16 Jan 2019 09:03
URI: http://raiith.iith.ac.in/id/eprint/2262
Publisher URL:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 2262 Statistics for this ePrint Item