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ME Winter Seminar - 3/12/14

You are cordially invited to the Mechanical Department Seminar Series

Speaker: Davood Abdollahian
Date: Wednesday, March 12, 2014

Location: Bannan Hall 142 (Law Building)
Time: 12:00 p.m. - 1:00 p.m.

Experimental Study of Two-Phase Flow in Microgravity


Davood Abdollahian


March 12, 2014



The increased power requirements of modern day spacecraft require more efficient thermal management methods. In comparison to single phase liquid or gaseous loops, flow boiling systems take advantage of heat of vaporization and can remove considerably larger heat loads. Flow boiling loops can reduce the size and weight of spacecraft and have been considered for application in space based systems.

A two-phase test loop was designed and constructed to generate reduced gravity data for two-phase pressure drop and Critical Heat Flux (CHF). The experiments were performed during a set of airplane trajectories aboard the NASA KC-135 and DC-9 aircrafts. The test results were used to demonstrate the applicability of the earth gravity models for prediction of reduced gravity two-phase friction pressure drop.



Davood Abdollahian has over thirty years experience in thermal hydraulic application and R&D. He worked for over 20 years at S. Levy, Inc. where he conducted research and applied engineering projects in support of nuclear industry. He joined General Electric Company in 2000 and was involved in GE Loss of Coolant Accident and transient analysis. In 2008 he joined Areva, Inc. as an advisory engineer and worked in development of computer models and methodology for accident analysis. He retired from industry in December 2013 and is presently adjunct lecturer at Santa Clara University and San Jose State University.