In order to investigate the evolution of the isospin fractionation degree, (N/Z)n/(N/Z)Nimf with the neutron to proton ratio of the colliding system , Fig.1 shows the (N/Z)n/(N/Z)Nimf as a function of the neutron-prot...In order to investigate the evolution of the isospin fractionation degree, (N/Z)n/(N/Z)Nimf with the neutron to proton ratio of the colliding system , Fig.1 shows the (N/Z)n/(N/Z)Nimf as a function of the neutron-proton ratio of the colliding system for the reactions 104Sn+104Sn,112Sn+112Sn and 124Sn+124Sn at the beam energy of 50 MeV/u and impact parameter 6=0.0 fm (right window) and 4.0 fm (left window) , where the neutron to proton ratios of the above three colliding systems are 1.01, 1.34 and 1.48. In Fig.l there are three展开更多
Cross section is a fundamental concept in collision theory. This concept hasbeen formulated for binary collisions,i.e.,collisions between two incidentparticles.As far as binary collisions are concerned,one can describ...Cross section is a fundamental concept in collision theory. This concept hasbeen formulated for binary collisions,i.e.,collisions between two incidentparticles.As far as binary collisions are concerned,one can describe withdifferential and integrated cross sections any elementary processes includingdissociation and rearrangement as well as elastic and inelastic scattering.It isbelieved,however that besides binary collisions there are three-body colli-sions,i.e.,collisions among three incident particles.Thus it is of展开更多
In this study, a three-dimensional model based on RANS, slender-body theory and Newton-Euler dynamics is established to study the number concentration, one of the most important fluidization characteristics of cylindr...In this study, a three-dimensional model based on RANS, slender-body theory and Newton-Euler dynamics is established to study the number concentration, one of the most important fluidization characteristics of cylindrical particles. Also, the effects of interaction between cylindrical particles are taken into account by introducing the rigid collision dynamics. To validate the model, the fluidization experiments of cylindrical particles in a cold-state fluidized bed are carried out. The number concentration characteristics of cylindrical particles are obtained from computational fluid dynamics (CFD) simulation. It is found that cylindrical particles arriving at the exit of the riser the earliest come from the near-wall regions, the horizontal transfer of so many cylindrical particles from the radial centre regions to the near-wall regions is evident. Meanwhile, there is no distinct relationship between the number concentration and inlet wind velocity.展开更多
文摘In order to investigate the evolution of the isospin fractionation degree, (N/Z)n/(N/Z)Nimf with the neutron to proton ratio of the colliding system , Fig.1 shows the (N/Z)n/(N/Z)Nimf as a function of the neutron-proton ratio of the colliding system for the reactions 104Sn+104Sn,112Sn+112Sn and 124Sn+124Sn at the beam energy of 50 MeV/u and impact parameter 6=0.0 fm (right window) and 4.0 fm (left window) , where the neutron to proton ratios of the above three colliding systems are 1.01, 1.34 and 1.48. In Fig.l there are three
文摘Cross section is a fundamental concept in collision theory. This concept hasbeen formulated for binary collisions,i.e.,collisions between two incidentparticles.As far as binary collisions are concerned,one can describe withdifferential and integrated cross sections any elementary processes includingdissociation and rearrangement as well as elastic and inelastic scattering.It isbelieved,however that besides binary collisions there are three-body colli-sions,i.e.,collisions among three incident particles.Thus it is of
基金Supported by the Natural Science Fund for Colleges and Universities in Jiangsu Province(2011112TSJ0149)Jiangsu Key Laboratory of Process Enhancement & New Energy Equipment Technology at Nanjing University of Technology,China
文摘In this study, a three-dimensional model based on RANS, slender-body theory and Newton-Euler dynamics is established to study the number concentration, one of the most important fluidization characteristics of cylindrical particles. Also, the effects of interaction between cylindrical particles are taken into account by introducing the rigid collision dynamics. To validate the model, the fluidization experiments of cylindrical particles in a cold-state fluidized bed are carried out. The number concentration characteristics of cylindrical particles are obtained from computational fluid dynamics (CFD) simulation. It is found that cylindrical particles arriving at the exit of the riser the earliest come from the near-wall regions, the horizontal transfer of so many cylindrical particles from the radial centre regions to the near-wall regions is evident. Meanwhile, there is no distinct relationship between the number concentration and inlet wind velocity.
