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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Benjamin, J. Jones Suresh, V. Garimella |
| Copyright Year | 2009 |
| Abstract | The influence of surface roughness on flow boiling heat transfer and pressure drop in microchannels is experimentally explored. The microchannel heat sink employed in the study consists of 10 parallel, 25.4 mm long channels with nominal dimensions of 500 μm × 500 μm. The channels were produced by saw-cutting. Two of the test piece surfaces were roughened to varying degrees with electrical discharge machining (EDM). The roughness average, Ra, varied from 1.4 μm for the as-fabricated, saw-cut surface to 3.9 and 6.7 μm for the two roughened EDM surfaces. Deionized water was used as the working fluid. Experiments indicate that the surface roughness has little influence on boiling incipience and only a minor impact on saturated boiling heat transfer coefficients at lower heat fluxes. For wall heat fluxes above 1500 kW/m2, the two EDM surfaces (3.9 and 6.7 μm) have similar heat transfer coefficients that were 20 to 35% higher than those measured for the saw cut surface (1.4 μm). Analysis of the pressure drop measurements indicates that only the roughest surface (6.7 μm) has an adverse effect on the two-phase pressure drop. |
| Sponsorship | Electronic and Photonic Packaging Division |
| Starting Page | 409 |
| Ending Page | 418 |
| Page Count | 10 |
| File Format | |
| ISBN | 9780791843604 |
| DOI | 10.1115/InterPACK2009-89168 |
| e-ISBN | 9780791838518 |
| Volume Number | ASME 2009 InterPACK Conference, Volume 2 |
| Conference Proceedings | ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability |
| Language | English |
| Publisher Date | 2009-07-19 |
| Publisher Place | San Francisco, California, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Water Dimensions Surface roughness Boiling Flow (dynamics) Electrical discharge machining Microchannels Cutting Heat Fluids Pressure drop Flux (metallurgy) Heat transfer coefficients Heat sinks Heat transfer |
| Content Type | Text |
| Resource Type | Article |
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