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
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发表时间:
2013-03
影响因子:
2.8
通讯作者:
Jinghai Li
中科院分区:
文献类型:
--
作者:
Xipeng Li;Peng Wang;Junwu Wang;Jinghai Li
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 In our model problem, fluid is withdrawn from a two-dimensional microcavity through a narrow outlet above the interface of two immiscible fluids.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.
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DOI:
--
发表时间:
2010
期刊:
--
影响因子:
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通讯作者:
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