On different calculation formulas of the pressure term in bi-phase SPH simulations

Shuai Chen; Wei Niu

doi:10.1063/1.5052504

On different calculation formulas of the pressure term in bi-phase SPH simulations

Shuai Chen
, Wei Niu^*

^*此作品的通讯作者

中法工程师学院/国际通用工程学院

科研成果: 期刊稿件 › 文章 › 同行评审

2 引用（Scopus）

摘要

The smoothed particle hydrodynamics (SPH) method is usually expected to be an efficient numerical tool for calculating the multiphase phenomena in compressors. However, numerical instability arises around the interfaces due to the pressure inconsistency. By analyzing different formula of the pressure term under SPH approximation, we show that the frequently-used formulation (n=-1) leads to the worst performance and is thus not recommended. By contrast, we suggest the formulas n=0 and 1 in future practical SPH applications.

源语言	英语
文章编号	105131
期刊	AIP Advances
卷	8
期	10
DOI	https://doi.org/10.1063/1.5052504
出版状态	已出版 - 1 10月 2018

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10.1063/1.5052504

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abstract = "The smoothed particle hydrodynamics (SPH) method is usually expected to be an efficient numerical tool for calculating the multiphase phenomena in compressors. However, numerical instability arises around the interfaces due to the pressure inconsistency. By analyzing different formula of the pressure term under SPH approximation, we show that the frequently-used formulation (n=-1) leads to the worst performance and is thus not recommended. By contrast, we suggest the formulas n=0 and 1 in future practical SPH applications.",

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AB - The smoothed particle hydrodynamics (SPH) method is usually expected to be an efficient numerical tool for calculating the multiphase phenomena in compressors. However, numerical instability arises around the interfaces due to the pressure inconsistency. By analyzing different formula of the pressure term under SPH approximation, we show that the frequently-used formulation (n=-1) leads to the worst performance and is thus not recommended. By contrast, we suggest the formulas n=0 and 1 in future practical SPH applications.

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On different calculation formulas of the pressure term in bi-phase SPH simulations

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