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柏拉图在《会饮篇》中通过宴会参与者对爱神不同的颂词,展示了关于爱的众多观点.爱能让人勇敢不畏牺牲,爱是美好品德之间的相互吸引,爱维持了大自然的和谐状态,爱是对属己之物的爱,爱也是对美的爱.柏拉图通过对这些观点的否定与整合,借助苏格拉底的叙述,最终为人们描述了爱的本质与功用. 相似文献
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A k-ε-kp multi-fluid model was used to simulate confined swirling gas-solid two phase jet comprised of particle-laden flow from a center tube and a swirling air stream entering the test section from the coaxial annular. After considering the drag force between the two phases and gravity, a series of numerical simulations of the two-phase flow of 30μm, 45μm, 60μm diameter particles were performed on a x×r＝50×50 mesh grid respectively. The results showed that the k-ε-kp multi-fluid model can be applied to predict moderate swirling multi-phase flow. When the particle diameter is large, the collision of the particles with the wall will influence the prediction accuracy. The bigger the diameter of the particles, the stronger the collision with the wall, and the more obvious the difference between measured and calculated results. 相似文献
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