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2012, a NASA laptop containing the background check information and other personal information of approximately 10,0000 employees was stolen from an employee's car, and a representative of the employees from the previous suit announced plans to sue NASA over its incautious handling of their information. The issue continued to simmer through 2014, when Bellan and another dual-national researcher from
Ireland were required to sign a loyalty oath to the US, which they argued went well beyond the requirements of the 2004 policy. After an intervention by congresswoman
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After the loss, some employees left JPL, but Bellan remained and submitted her background information. It was rejected because she included a note stating that she was submitting the information under duress, and she was required to submit it a second time without the note. In a related incident in
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on a vacation in 1969, and she and her twin sister
Larisse (who died in 1980) were encouraged to apply to Princeton for graduate study. They did, becoming the second and third women graduate students in Princeton's engineering school, after Genevieve Segol, a civil and geological engineer who also
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to require background checks on scientists at JPL. Bellan became part of a group of JPL employees who filed a lawsuit in 2007 against the policy, claiming that the checks into her personal life were too intrusive and harmed the collegial atmosphere of JPL, that as contract employees rather than
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government employees they should not be subject to the same checks required of people who performed classified research, and that this sort of government intrusiveness, typical of the communist regime that Bellan grew up under, was inappropriate for a democracy. The case,
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Bellan's research involves the simulation of reacting mixtures, and has shown the importance in these simulations of combining the effects of both fluid motion and heat transfer, down to the smallest levels of scale. Applications of this work include the development of
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After continuing at
Princeton as a postdoctoral researcher, Bellan joined the Jet Propulsion Laboratory in 1978. She was a lecturer in jet propulsion at Caltech in 1992, became a visiting associate there in 1995, and was Chancellor's Distinguished Lecturer at the
161:(AIAA) gave her their 2018 Pendray Aerospace Literature Award, "for widely reaching, seminal and outstanding publications on bio-fuels, sprays and high pressure flows to meet future challenges of Aeronautics and Astronautics combustion systems".
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in 2021, "for establishing fundamental models of turbulent multi-phase phenomena with the models relying on fluid mechanics coupled to non-equilibrium thermodynamics and chemistry".
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came to
Princeton from France, and the first women in Princeton's graduate program in aerospace and mechanical engineering. At Princeton, the twins were supported by
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and French newspapers. She earned another master's degree at
Princeton in 1972, and, with her sister, completed her Ph.D. in 1974. Her dissertation was
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In 2014, JPL gave Bellan their highest research award, the
Magellan Award for Excellence, for her methods for simulating mixtures of particles and
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Bellan is originally from
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112:, understanding the atmosphere of Venus, and modeling the interaction of rocket plumes with the surface of the Moon.
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known for her research on turbulence in high-pressure reactions, and on the interactions between fluid dynamics and
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in 1988, and a Fellow of the
American Institute of Aeronautics and Astronautics in 2008. She became a Fellow of
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A Theory of
Turbulent Combustion and Nitric Oxide Formation for Dual-carbureted Stratified-charge Engines
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A Theory of
Turbulent Combustion and Nitric Oxide Formation for Dual-carbureted Stratified-charge Engines
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34:(JPL) and visiting associate in the Department of Mechanical and Civil Engineering of the
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through Amelia Earhart Fellowships, and their arrival at Princeton was reported in
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376:"Speaker biography: Large Eddy Simulation of Two-Phase Flows with Evaporation"
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from 1995 to 1996. She became a senior research scientist at JPL in 1997.
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468:, Caltech Division of Engineering and Applied Science, 22 October 2014
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292:"#29: Name these pioneering twin sister Princeton Engineering Ph.D.'s"
22:(née Rosentweig) is a Romanian-French-American aerospace engineer and
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Fellows of the American Institute of Aeronautics and Astronautics
435:"Dr. Josette Bellan Receives Pendray Aerospace Literature Award"
462:"Dr. Josette Bellan Receives JPL Magellan Award for Excellence"
514:"NASA Scientists Lose Supreme Court Case on Background Checks"
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in these reactions. She is a senior research scientist at the
534:"JPL employees demand probe of NASA's data security measures"
486:"Engineering Professor Lands NASA Grant for Lunar Research"
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100Years100Facts, Part Five: Women at Princeton Engineering
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209:, Caltech Department of Mechanical and Civil Engineering
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Fellows of the American Society of Mechanical Engineers
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She is a citizen of both France and the United States.
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in ground and aerospace vehicles and their effects on
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in 2010, but the court upheld the government policy.
262:"JPL employees take their case to the Supreme Court"
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50:in 1964 after studying at the
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52:Lycée Jules-Ferry (Paris)
32:Jet Propulsion Laboratory
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170:The Combustion Institute
409:"A question of loyalty"
324:Princeton Alumni Weekly
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298:, Princeton University
120:A 2004 policy of the
106:combustion efficiency
234:"Dr. Josette Bellan"
155:supercritical fluids
63:Princeton University
42:Education and career
353:"Josette R. Bellan"
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176:References
102:bio-fuels
143:Judy Chu
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357:E-tree
268:, KPCC
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157:. The
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