北京科技大學(xué)建校70周年系列學(xué)術(shù)活動(dòng)——江松院士
主講人:江松 院士
時(shí)間:2021年12月16日 16:00
地點(diǎn):學(xué)術(shù)報(bào)告廳
題目:Magnetic inhibition on the Rayleigh-Taylor/thermal convection instability
in non-resistive magnetohydrodynamics
摘要:The Rayleigh-Taylor (RT) instability is well known as gravity-driven instability in fluids when a heavy fluid is on top of a light one, while thermal convection instability often arises when a fluid is heated from below. Both of them appear in a wide range of applications in science and technology, such as in inertia confinement fusion, Tokamak, supernova explosions. In this talk, mathematical analysis of the magnetic RT/thermal convection instability in incompressible/compressible fluids will be presented, in particular, effects of (impressed) magnetic fields upon the growth of the RT/thermal convection instability will be discussed and analyzed quantitatively. We shall show that a sufficiently strong (impressed) magnetic field can inhibit the RT/thermal convection instability; otherwise, instability will still occur in the sense that solutions do not continuously depend on initial data.
簡(jiǎn)介:江松,中國(guó)科學(xué)院院士、國(guó)家自然科學(xué)基金委數(shù)理學(xué)部主任、北京應(yīng)用物理與計(jì)算數(shù)學(xué)研究所研究員。1997年進(jìn)入北京應(yīng)用物理與計(jì)算數(shù)學(xué)研究所,歷任研究室主任、科技委主任、副所長(zhǎng)、黨委書記。曾獲國(guó)家自然科學(xué)二等獎(jiǎng)、軍隊(duì)科技進(jìn)步一等獎(jiǎng)。1998年入選國(guó)家“百千萬人才工程”;并于1998年獲第六屆中國(guó)青年科技獎(jiǎng);2002年,獲得國(guó)家杰出青年基金資助;2003年,獲中國(guó)科協(xié)“求是杰出青年獎(jiǎng)”;2003年,認(rèn)定為“四川省學(xué)術(shù)和技術(shù)帶頭人”;2014年,評(píng)選為中國(guó)工程物理研究院杰出專家;2019年獲“何梁何利科學(xué)與技術(shù)進(jìn)步獎(jiǎng)”。
江松院士主要從事可壓縮流體力學(xué)數(shù)學(xué)理論、計(jì)算方法及應(yīng)用研究。在可壓縮Navier-Stokes方法與磁流體力學(xué)方程的數(shù)學(xué)理論、武器物理計(jì)算方法和重大武器型號(hào)軟件平臺(tái)研制等方面取得了突出成績(jī)。