This paper is motivated by the need for efficient control of liquid sprays and presents an experimental effort to characterize the microboiling process of FC-72 in confined micro-heaters. The experimental set up consists of commercial Thermal Ink Jet (TIJ) heads used to boil degassed FC-72 inside a confined chamber with a transparent viewing window. The micro-boiling process is illuminated by a flash lamp and a CCD camera attached to a microscope captures images of the bubble’s growth. Image processing software provides precise quantitative information about the position and projected area of the bubble. The energy ranges applied to the microheater are 5.61μJ to 17.2μJ per pulse. Nucleation times were found to be in the range of 1.2 – 2.4 μs leading to a rapid growth followed by a small shrink from 4–5 μs. Maximum bubble sizes ranged from 1.2 – 2 times larger than the heater area. A faster nucleation time and longer bubble lifecycle are observed for FC-72 when compared to water which is attributed to the lower boiling point and latent heat of FC-72.
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ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4848-7
PROCEEDINGS PAPER
The Microboiling Processes of FC-72 in a Confined Space Available to Purchase
Anthony J. Fernandez,
Anthony J. Fernandez
Santa Clara University, Santa Clara, CA
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Sergio Escobar-Vargas,
Sergio Escobar-Vargas
Santa Clara University, Santa Clara, CA
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Drazen Fabris,
Drazen Fabris
Santa Clara University, Santa Clara, CA
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Jorge E. Gonzalez,
Jorge E. Gonzalez
Santa Clara University, Santa Clara, CA
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Ratnesh Sharma,
Ratnesh Sharma
Hewlett Packard Laboratories, Palo Alto, CA
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Cullen Bash
Cullen Bash
Hewlett Packard Laboratories, Palo Alto, CA
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Anthony J. Fernandez
Santa Clara University, Santa Clara, CA
Sergio Escobar-Vargas
Santa Clara University, Santa Clara, CA
Drazen Fabris
Santa Clara University, Santa Clara, CA
Jorge E. Gonzalez
Santa Clara University, Santa Clara, CA
Ratnesh Sharma
Hewlett Packard Laboratories, Palo Alto, CA
Cullen Bash
Hewlett Packard Laboratories, Palo Alto, CA
Paper No:
HT2008-56389, pp. 465-470; 6 pages
Published Online:
July 7, 2009
Citation
Fernandez, AJ, Escobar-Vargas, S, Fabris, D, Gonzalez, JE, Sharma, R, & Bash, C. "The Microboiling Processes of FC-72 in a Confined Space." Proceedings of the ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. Heat Transfer: Volume 2. Jacksonville, Florida, USA. August 10–14, 2008. pp. 465-470. ASME. https://doi.org/10.1115/HT2008-56389
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