The use of phase change heat transfer in parallel minichannels and microchannels is one of the solutions proposed for cooling high heat flux systems. The increase in pressure drop in a two phase system is one of the problems, that need to be studied in detail before proceeding to any design phase. The pressure drop fluctuations in a network of parallel channels connected by a common head need to be addressed for stable operation of flow boiling systems. The current work focuses on studying the pressure-drop fluctuations and flow instabilities in a set of six parallel rectangular minichannels, each with 333 μm hydraulic diameter. Demonized and degassed water was used for all the experiments. Pressure fluctuations are recorded and signal analysis is performed to find the dominant frequencies and their amplitudes. These pressure fluctuations are then mapped to their corresponding flow patterns observed using a high speed camera. The results help us to relate pressure fluctuations to different flow characteristics, and their effect on flow instability.
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ASME 2004 2nd International Conference on Microchannels and Minichannels
June 17–19, 2004
Rochester, New York, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4164-2
PROCEEDINGS PAPER
Experimental Study of Flow Patterns, Pressure Drop and Flow Instabilities in Parallel Rectangular Minichannels
Prabhu Balasubramanian,
Prabhu Balasubramanian
Rochester Institute of Technology, Rochester, NY
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Satish G. Kandlikar
Satish G. Kandlikar
Rochester Institute of Technology, Rochester, NY
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Prabhu Balasubramanian
Rochester Institute of Technology, Rochester, NY
Satish G. Kandlikar
Rochester Institute of Technology, Rochester, NY
Paper No:
ICMM2004-2371, pp. 475-481; 7 pages
Published Online:
December 2, 2008
Citation
Balasubramanian, P, & Kandlikar, SG. "Experimental Study of Flow Patterns, Pressure Drop and Flow Instabilities in Parallel Rectangular Minichannels." Proceedings of the ASME 2004 2nd International Conference on Microchannels and Minichannels. ASME 2nd International Conference on Microchannels and Minichannels. Rochester, New York, USA. June 17–19, 2004. pp. 475-481. ASME. https://doi.org/10.1115/ICMM2004-2371
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