基于计算流体力学(CFD)数值模拟和物理模型试验结合的方式,开展涵洞式直立堤在波浪作用下的水体交换研究。CFD数值模拟采用VPM(volume-average/point-value method)-THINC(tangent of hyperbola for interface capturing)/QQ(quadratic ...基于计算流体力学(CFD)数值模拟和物理模型试验结合的方式,开展涵洞式直立堤在波浪作用下的水体交换研究。CFD数值模拟采用VPM(volume-average/point-value method)-THINC(tangent of hyperbola for interface capturing)/QQ(quadratic surface representation and Gaussian quadrature)模型,并在此基础上提出一种能够标记涵洞内外水体变化的双液相流体体积模型(VOF)方法,定性及定量描述涵洞内外水体的交换特性;物理模型试验主要用来验证数值模型的准确性。研究表明,在波浪的作用下,涵洞内部会形成一股往复振荡的水流,对水体交换起到重要的作用。该振荡流主要受到涵洞高度、波浪周期以及波高的影响,涵洞深度对其影响不大。在波浪长时间的作用下,涵洞式直立堤能有效地增强港池内外水体交换。展开更多
Two-phase electrophoresis was used to separate the dyestuffs from their dilute solutions. Several dyestuffs (naphthol green B, acid-chrome blue K, methyl blue and direct fast torquoise blue GL, and n-butanol) were tr...Two-phase electrophoresis was used to separate the dyestuffs from their dilute solutions. Several dyestuffs (naphthol green B, acid-chrome blue K, methyl blue and direct fast torquoise blue GL, and n-butanol) were treated in a self-designed experimental setup and the mass transfer characteristics in this process were studied. The results confirm the potential of this technique for recovering dyestuffs from their dilute solutions.展开更多
文摘基于计算流体力学(CFD)数值模拟和物理模型试验结合的方式,开展涵洞式直立堤在波浪作用下的水体交换研究。CFD数值模拟采用VPM(volume-average/point-value method)-THINC(tangent of hyperbola for interface capturing)/QQ(quadratic surface representation and Gaussian quadrature)模型,并在此基础上提出一种能够标记涵洞内外水体变化的双液相流体体积模型(VOF)方法,定性及定量描述涵洞内外水体的交换特性;物理模型试验主要用来验证数值模型的准确性。研究表明,在波浪的作用下,涵洞内部会形成一股往复振荡的水流,对水体交换起到重要的作用。该振荡流主要受到涵洞高度、波浪周期以及波高的影响,涵洞深度对其影响不大。在波浪长时间的作用下,涵洞式直立堤能有效地增强港池内外水体交换。
基金Supported by the National Natural Science Foundation of China and Tsinghua University Foundation.
文摘Two-phase electrophoresis was used to separate the dyestuffs from their dilute solutions. Several dyestuffs (naphthol green B, acid-chrome blue K, methyl blue and direct fast torquoise blue GL, and n-butanol) were treated in a self-designed experimental setup and the mass transfer characteristics in this process were studied. The results confirm the potential of this technique for recovering dyestuffs from their dilute solutions.