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THERMAL-HYDRAULIC PHENOMENA IN MICROCHANNELS WITH BOILING

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THERMAL-HYDRAULIC PHENOMENA IN MICROCHANNELS WITH BOILING Powered By Docstoc
					   THERMAL-HYDRAULIC PHENOMENA IN MICROCHANNELS
                   WITH BOILING


                                Prof. Arthur E. Bergles


Former Dean of School of Engineering, Rensselaer Polytechnic Institute, U. S. A.
          Senior Lecturer of Mechanical Engineering, MIT. U.S.A.



Abstract -- This seminar discusses heat transfer and fluid flow phenomena
associated with boiling in microchannels having characteristic cross-section
dimensions of about 10-100 mm, concentrating on arrays of
mirochannels. Considered are: flow distribution, flow instabilities, boiling
inception, flow fluctuations, established boiling, and critical heat flux (CHF). The
point is made that there is an unstable “hydrodynamic CHF” that is well below the
stable CHF. Advanced manufacturing techniques make it possible to create
channels, particularly in silicon, that insure flow stability and enhance heat
transfer.

                    Date:    August 6, 2008
                    Time:    10:00a.m.
                    Place:   Room F210      Mechanical Engineering Building

				
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