SPH simulation of selective withdrawal from microcavity

SPH simulation of selective withdrawal from microcavity
复制标题

选择性退出微腔的 SPH 模拟

DOI:
10.1007/s10404-013-1165-1
复制
发表时间:
2013-03
影响因子:
2.8
通讯作者:
Jinghai Li
Jinghai Li
中科院分区:
工程技术3区
文献类型:
--
作者:
Xipeng Li;Peng Wang;Junwu Wang;Jinghai Li

文献摘要

参考文献

被引文献

相似文献

采用光滑粒子流体动力学(SPH)方法,对弱可压缩流体的选择性抽取进行了研究。在我们的模型问题中,流体是从一个二维微腔通过一个狭窄的出口以上的两个不混溶流体的界面。流出边界由具有规定速度的流体颗粒的特定区域以及人工边界颗粒的引入来实现。基于流体粒子的平均数密度,边界粒子的有效贡献被校正为可压缩上下文。研究发现,对于每个初始界面高度,存在一个临界提取速率,超过该临界提取速率,下相与上相一起沿着被夹带在一个薄的喷口中。此外,重新定义的弗劳德数可以作为多相流流动行为的判据。此外,较高的表面张力、较小的动力粘度和密度都导致较长的形成喷动态的阈值时间,从而有利于较高效率和较大数量的上相的提取。
The selective withdrawal of weakly compressible fluids is investigated by smoothed particle hydrodynamics (SPH) with a revised model of surface tension. In our model problem, fluid is withdrawn from a two-dimensional microcavity through a narrow outlet above the interface of two immiscible fluids. The outflow boundary is implemented by a particular zone of fluid particles with prescribed velocity, together with the introduction of artificial boundary particles. Based on the average number density of fluid particles, the effective contribution of boundary particles is corrected for the compressible context. It is found that there exists a critical withdrawal rate for each initial interface height, beyond which the lower phase becomes entrained in a thin spout along with the upper phase. Besides, the Froude number with redefinition for this kind of multiphase flow could serve as a criterion of flow behavior. Furthermore, larger surface tension, smaller dynamical viscosity and density of the upper phase all lead to longer threshold time of formation of the spout state, and thus are favorable to the withdrawal of upper phase both in terms of higher efficiency and larger quantity.
DOI: --
发表时间: 2010
期刊: --
影响因子: --
作者:
uaning Zhua;N. S. Martysa;Chiara Ferrarisa;Daniel De Keeb
通讯作者: uaning Zhua;N. S. Martysa;Chiara Ferrarisa;Daniel De Keeb
DOI: 10.1016/j.powtec.2007.11.024
发表时间: 2008-03
期刊: Powder Technology
影响因子: 5.2
作者:
Guangzheng Zhou;W. Ge;Jinghai Li
通讯作者: Guangzheng Zhou;W. Ge;Jinghai Li
DOI: 10.1201/9781315373140-19
发表时间: 2016-11
期刊: Simulation of Additive Manufacturing using Meshfree Methods
影响因子: --
作者:
Donald H. House;John Keyser
通讯作者: Donald H. House;John Keyser
DOI: 10.1007/s10404-004-0021-8
发表时间: 2005-05-01
影响因子: 2.8
作者:
Mukherjee, A;Kandlikar, SG
通讯作者: Kandlikar, SG
DOI: 10.1103/physrevlett.102.144501
发表时间: 2009-04
影响因子: 8.6
作者:
F. Blanchette;Wendy W. Zhang
通讯作者: F. Blanchette;Wendy W. Zhang