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DC Field | Value | Language |
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dc.contributor.author | Ahmad, SW | - |
dc.contributor.author | Karayiannis, TG | - |
dc.contributor.author | Kenning, DBR | - |
dc.contributor.author | Luke, A | - |
dc.date.accessioned | 2012-09-17T15:02:43Z | - |
dc.date.available | 2012-09-17T15:02:43Z | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | Applied Thermal Engineering, 31(11-12): 1994 - 2003, Aug 2011 | en_US |
dc.identifier.issn | 1359-4311 | - |
dc.identifier.uri | http://www.sciencedirect.com/science/article/pii/S1359431111001372 | en |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/6687 | - |
dc.description | Copyright @ 2011 Elsevier | en_US |
dc.description.abstract | Saturated pool boiling of R-123 at 1 bar, including the critical heat flux (CHF), was enhanced by modifying the surface characteristics and applying a high intensity electrostatic field, the latter termed electrohydrodynamic (and abbreviated EHD) enhancement. The heat flux was varied from very low values in the natural convection regime up to CHF. Experiments were performed with increasing and decreasing heat flux to study boiling hysteresis without and with EHD. Boiling occurred on the sand blasted surface of a cylindrical copper block with embedded electrical heating elements, with standardized surface parameter Pa = 3.5 µm. The electric field was generated by a potential of 5 kV to 25 kV, applied through a 40 mm diameter circular electrode of ss-304 wire mesh, aperture size 5.1 mm, located at distances of 5 - 60 mm from the surface, with most of the data obtained for 20 mm. The data for the rough surface were compared with earlier data for a smooth surface and indicated a significant increase in the heat transfer rates. EHD produced a further increase in the heat transfer rates, particularly at low heat flux values and near the CHF. Boiling hysteresis was reduced progressively by EHD and eliminated at high field strength. | en_US |
dc.description.sponsorship | This work was supported by Government of Pakistan under a scholarship programme. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.subject | Pool boiling | en_US |
dc.subject | Surface roughness | en_US |
dc.subject | Critical heat flux | en_US |
dc.subject | Electrohydrodynamic enhancement | en_US |
dc.title | Compound effect of EHD and surface roughness in pool boiling and CHF with R-123 | en_US |
dc.type | Article | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/j.applthermaleng.2011.03.005 | - |
pubs.organisational-data | /Brunel | - |
pubs.organisational-data | /Brunel/Brunel Active Staff | - |
pubs.organisational-data | /Brunel/Brunel Active Staff/School of Engineering & Design | - |
pubs.organisational-data | /Brunel/Brunel Active Staff/School of Engineering & Design/Mechanical Engineering | - |
pubs.organisational-data | /Brunel/University Research Centres and Groups | - |
pubs.organisational-data | /Brunel/University Research Centres and Groups/School of Engineering and Design - URCs and Groups | - |
pubs.organisational-data | /Brunel/University Research Centres and Groups/School of Engineering and Design - URCs and Groups/Centre for Energy and Built Environment Research | - |
Appears in Collections: | Publications Mechanical and Aerospace Engineering Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
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Compound effect of EHD and surface roughness in pool boiling and CHF with R-123.pdf | 358.14 kB | Adobe PDF | View/Open |
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