세미나 및 이벤트
Dynamics of Fronts in Chemical and Bacterial Media:
세미나 날짜
2007-06-08
작성자
박심령
작성일
2007-05-28
조회
1573
1. 제 목 : Dynamics of Fronts in Chemical and Bacterial Media:
If you’ve seen one front, you’ve seen them all
2. 연 사 : Professor Paul Ronney
(Dept. of Aerospace and Mechanical Engineering,
Univ. of Southern California)
3. 일 시 : 2007년 6월 8일 (금) 15:00 ~ 16:30
4. 장 소 : 301동 117호
5. 내 용 :
Self-propagating reaction fronts occur in many chemical and physical
systems possessing two key ingredients: a reactive medium (for
example a fuel-air mixture in the case of flames) and an autocatalyst
that is a product of the reaction that also accelerates the
reaction(for example thermal energy in the case of flames). Self-propagation occurs
when the autocatalyst diffuses into the reactive medium, initiating reaction and
creating more autocatalyst. This enables reaction-diffusion fronts to propagate at
steady rates far from any initiation site. In addition to flames, propagating fronts
have been observed in aqueous reactions, free-radical initiated polymerization
processes and even propagating fronts of motile bacteria such as E-coli. This talk will
focus on a comparison of the dynamics of these four different types of fronts
including propagation rates, extinction conditions and instability mechanisms. Our
research has shown that despite the disparate nature of the reactants and
autocatalysts in these four systems, remarkably similar dynamical behavior is
observed since the underlying driving mechanisms for propagation are similar. The
key role of loss Mechanisms (heat, chemical species or cell death) and differential
diffusion of reactant and autocatalyst ("Lewis number") is demonstrated.
6. 연사약력 :
1978 University of California, Berkeley, B.S.
1983 Massachusetts Institute of Technology, Sc.D.
1986-93 Princeton University, Assistant Professor
1994 University of Southern California, Professor
Payload Specialist Astronaut (Alternate) for Space Shuttle mission MSL-1 (1997)
Structure Of Flame Balls At Low Lewis-number (SOFBALL) flew on three Space
Shuttle missions including the STS-107 Columbia flight in January 2003
Fellow of the Institute of Physics
National Science Foundation Presidential Young Investigator Award
7. 문 의 : 기계항공공학부 정석호 교수(☏ 880-7114)
If you’ve seen one front, you’ve seen them all
2. 연 사 : Professor Paul Ronney
(Dept. of Aerospace and Mechanical Engineering,
Univ. of Southern California)
3. 일 시 : 2007년 6월 8일 (금) 15:00 ~ 16:30
4. 장 소 : 301동 117호
5. 내 용 :
Self-propagating reaction fronts occur in many chemical and physical
systems possessing two key ingredients: a reactive medium (for
example a fuel-air mixture in the case of flames) and an autocatalyst
that is a product of the reaction that also accelerates the
reaction(for example thermal energy in the case of flames). Self-propagation occurs
when the autocatalyst diffuses into the reactive medium, initiating reaction and
creating more autocatalyst. This enables reaction-diffusion fronts to propagate at
steady rates far from any initiation site. In addition to flames, propagating fronts
have been observed in aqueous reactions, free-radical initiated polymerization
processes and even propagating fronts of motile bacteria such as E-coli. This talk will
focus on a comparison of the dynamics of these four different types of fronts
including propagation rates, extinction conditions and instability mechanisms. Our
research has shown that despite the disparate nature of the reactants and
autocatalysts in these four systems, remarkably similar dynamical behavior is
observed since the underlying driving mechanisms for propagation are similar. The
key role of loss Mechanisms (heat, chemical species or cell death) and differential
diffusion of reactant and autocatalyst ("Lewis number") is demonstrated.
6. 연사약력 :
1978 University of California, Berkeley, B.S.
1983 Massachusetts Institute of Technology, Sc.D.
1986-93 Princeton University, Assistant Professor
1994 University of Southern California, Professor
Payload Specialist Astronaut (Alternate) for Space Shuttle mission MSL-1 (1997)
Structure Of Flame Balls At Low Lewis-number (SOFBALL) flew on three Space
Shuttle missions including the STS-107 Columbia flight in January 2003
Fellow of the Institute of Physics
National Science Foundation Presidential Young Investigator Award
7. 문 의 : 기계항공공학부 정석호 교수(☏ 880-7114)
