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Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
Published on: March 12, 2019
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Smoothed particle hydrodynamics with adaptive spatial resolution for multiphase flows with large density ratio.
Xiufeng Yang1, Song-Charng Kong2, Qingquan Liu1
1School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China.
Physical Review. E
|December 24, 2021
Summary
This study enhances the adaptive spatial resolution (ASR) method for smoothed particle hydrodynamics (SPH) simulations of multiphase flows. The improved SPH-ASR method significantly reduces computational costs without sacrificing accuracy.
Area of Science:
- Computational fluid dynamics
- Multiphase flow simulation
Background:
- Smoothed Particle Hydrodynamics (SPH) is computationally expensive for multiphase flows with large density ratios.
- Traditional uniform spatial resolution (USR) limits efficiency in SPH simulations.
- Previous work introduced adaptive spatial resolution (ASR) for SPH in multiphase flows.
Purpose of the Study:
- To improve the SPH-ASR method for multiphase flows.
- Enhance particle distribution and adaptive resolution algorithms.
- Extend the SPH-ASR method to three-dimensional simulations.
Main Methods:
- Introduced a particle shifting technique considering variable smoothing length.
- Optimized the adaptive resolution algorithm.
- Extended the method from 2D to 3D applications.
Main Results:
- The enhanced SPH-ASR method maintains accuracy comparable to USR.
- Significant reduction in computational cost achieved.
- Validated through simulations of dam-break flows, liquid drop formation, and drop impact.
Conclusions:
- The improved SPH-ASR method offers a more efficient approach for multiphase flow simulations.
- The technique effectively balances computational cost and simulation accuracy.
- The 3D extension broadens the applicability of SPH-ASR.
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