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| 1 | Al-7Si-0.35Mg-xCu合金的品质系数和热裂敏感性(英文)显示文摘研究铜添加量(0.5%、1%、1.5%、2%、3%,质量分数)对A356合金的品质系数(Q_i)和热裂敏感性(HTS)的影响。结果显示,当铜添加量达到1.5%时,Q_i增加了约10%,这可能是由于富铜的Al_2Cu相和AlMgCuSi化合物的固溶强化和弥散硬化。然而,继续提高Cu添加量到3%,Q_i反而降低了近12%,这很可能是因为显微组织中脆性富Cu金属间化合物和微孔体积的增加导致抗拉强度和伸长率降低。用约束杆铸造法测试A356合金的热裂敏感性,结果显示随着铜含量的增加,其HTS也增加。热分析结果表明,铜拓宽了合金的凝固范围,进而降低了其流动性,增加了糊状合金暴露在热裂易感区的时间。高铜合金热裂表面的SEM也表明,其表面粗糙,且存在枝晶间/晶粒间微裂纹,这也证明了在凝固后期,合金萌生了热裂,没有足够的裂纹修复时间。 | R.TAGHIABADI A.FAYEGH A.PAKBIN M.NAZARI M.H.GHONCHEH | 2018 | Transactions of Nonferrous Metals Society of China2018，28，7： | 3 |
| 2 | An algorithm for the numerical solution of nonlinear fractional-order Van der Pol oscillator equation显示文摘 | H.Jafari C.M.Khalique M.Nazari | | 0，，： | 1 |
| 3 | Lattice Boltzmann simulation of natural convection in open end cavity with inclined hot wall显示文摘Natural convection in an open end cavity with a hot inclined wall is simulated based on the lattice Boltzmann method(LBM). The physics of flow and energy transfer in open end cavities are addressed when the hot wall is inclined. The combination of the two topics(open cavity and inclined walls) is the main novelty of the present study.The effects of the angle of the hot inclined wall on the flow field and heat transfer are thoroughly investigated. The Prandtl number is fixed to 0.71(air). The Rayleigh number and the angle of the hot inclined wall are varied in the range of 104 to 106 and 60° to 85°, respectively. The results are presented for two different aspect ratios, i.e., A = 1 and 2. The results obtained with the LBM are also compared with those of the finite volume method(FVM). The predicted results of the LBM conform to those of the FVM. The results show that by increasing the angle of the hot inclined wall and the aspect ratio of the cavity, the average Nusselt number decreases. The trend of the local Nusselt number on the inclined wall is also discussed. | M.NAZARI H.SHOKRI A.A.MOHAMAD | 2015 | Applied Mathematics and Mechanics(English Edition)2015，36，4： | 1 |
| 4 | A Review on Contact and Collision Methods for Multi-Body Hydrodynamic Problems in Complex Flows显示文摘Modeling and direct numerical simulation of particle-laden flows have a tremendous variety of applications in science and engineering across a vast spectrum of scales from pollution dispersion in the atmosphere,to fluidization in the combustion process,to aerosol deposition in spray medication,along with many others.Due to their strongly nonlinear and multiscale nature,the above complex phenomena still raise a very steep challenge to themost computationalmethods.In this review,we provide comprehensive coverage of multibody hydrodynamic(MBH)problems focusing on particulate suspensions in complex fluidic systems that have been simulated using hybrid Eulerian-Lagrangian particulate flow models.Among these hybridmodels,the Immersed Boundary-Lattice Boltzmann Method(IB-LBM)provides mathematically simple and computationally-efficient algorithms for solid-fluid hydrodynamic interactions in MBH simulations.This paper elaborates on the mathematical framework,applicability,and limitations of various’simple to complex’representations of closecontact interparticle interactions and collision methods,including short-range interparticle and particle-wall steric interactions,spring and lubrication forces,normal and oblique collisions,and mesoscale molecular models for deformable particle collisions based on hard-sphere and soft-sphere models in MBH models to simulate settling or flow of nonuniform particles of different geometric shapes and sizes in diverse fluidic systems. | S.Karimnejad A.Amiri Delouei H.Basagaoglu M.Nazari M.Shahmardan G.Falcucci M.Lauricella S.Succi | 2022 | Communications in Computational Physics2022，32，9： | 0 |
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