Nearly all illuminating classic hypersonic flow theories address aerodynamic phenomena as a perfect gas in the high-speed range and at the upper limit of continuum gas domain.The hypersonic flow is quantitatively defi...Nearly all illuminating classic hypersonic flow theories address aerodynamic phenomena as a perfect gas in the high-speed range and at the upper limit of continuum gas domain.The hypersonic flow is quantitatively defined by the Mach number independent principle,which is derived from the asymptotes of the Rankine-Hugoniot relationship.However,most hypersonic flows encounter strong shock-wave compressions resulting in a high enthalpy gas environment that always associates with nonequilibrium thermodynamic and quantum chemical-physics phenomena.Under this circumstance,the theoretic linkage between the microscopic particle dynamics and macroscopic thermodynamics properties of gas is lost.When the air mixture is ionized to become an electrically conducting medium,the governing physics now ventures into the regimes of quantum physics and electromagnetics.Therefore,the hypersonic flows are no longer a pure aerodynamics subject but a multidisciplinary science.In order to better understand the realistic hypersonic flows,all pertaining disciplines such as the nonequilibrium chemical kinetics,quantum physics,radiative heat transfer,and electromagnetics need to bring forth.展开更多
A narrative of landmarks in computational fluid dynamics(CFD)is presented to highlight the cornerstone achievements.Illuminating accomplishments starting from the very beginning of the coherent development until the m...A narrative of landmarks in computational fluid dynamics(CFD)is presented to highlight the cornerstone achievements.Illuminating accomplishments starting from the very beginning of the coherent development until the most recent progress will be elucidated over the span over more than six decades.Meanwhile,the cuttingedge scientific innovations will also be discussed for their lasting impacts to fluid dynamics and the physics-based modeling and simulation discipline.To traverse such a vast domain over time by a single presentation,numerous and excellent contributions to CFD will be unavoidably overlooked.Nevertheless it is my ardent hope that the present discussion will be able to reaffirm excellence in research and to identify new frontiers for scientific research.Especially,the challenges to future innovations will also be delineated to recommend for potential and fertile research areas for the modeling and simulation science.展开更多
文摘Nearly all illuminating classic hypersonic flow theories address aerodynamic phenomena as a perfect gas in the high-speed range and at the upper limit of continuum gas domain.The hypersonic flow is quantitatively defined by the Mach number independent principle,which is derived from the asymptotes of the Rankine-Hugoniot relationship.However,most hypersonic flows encounter strong shock-wave compressions resulting in a high enthalpy gas environment that always associates with nonequilibrium thermodynamic and quantum chemical-physics phenomena.Under this circumstance,the theoretic linkage between the microscopic particle dynamics and macroscopic thermodynamics properties of gas is lost.When the air mixture is ionized to become an electrically conducting medium,the governing physics now ventures into the regimes of quantum physics and electromagnetics.Therefore,the hypersonic flows are no longer a pure aerodynamics subject but a multidisciplinary science.In order to better understand the realistic hypersonic flows,all pertaining disciplines such as the nonequilibrium chemical kinetics,quantum physics,radiative heat transfer,and electromagnetics need to bring forth.
文摘A narrative of landmarks in computational fluid dynamics(CFD)is presented to highlight the cornerstone achievements.Illuminating accomplishments starting from the very beginning of the coherent development until the most recent progress will be elucidated over the span over more than six decades.Meanwhile,the cuttingedge scientific innovations will also be discussed for their lasting impacts to fluid dynamics and the physics-based modeling and simulation discipline.To traverse such a vast domain over time by a single presentation,numerous and excellent contributions to CFD will be unavoidably overlooked.Nevertheless it is my ardent hope that the present discussion will be able to reaffirm excellence in research and to identify new frontiers for scientific research.Especially,the challenges to future innovations will also be delineated to recommend for potential and fertile research areas for the modeling and simulation science.
