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10:13
A Microfluidic-based Hydrodynamic Trap for Single Particles
Published on: January 21, 2011
17.3K
Smoothed particle hydrodynamics method for evaporating multiphase flows.
Xiufeng Yang1, Song-Charng Kong1
1Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, USA.
Physical Review. E
|January 20, 2018
Summary
This study introduces an improved smoothed particle hydrodynamics (SPH) method for simulating evaporating multiphase flows, enhancing heat and mass transfer calculations for better accuracy.
Area of Science:
- Computational Fluid Dynamics
- Multiphase Flow Simulation
- Heat and Mass Transfer
Background:
- Smoothed particle hydrodynamics (SPH) is widely used for fluid flow simulations.
- Existing SPH methods need enhancement for accurate simulation of evaporating flows.
Purpose of the Study:
- To develop and validate an SPH method capable of simulating evaporating multiphase flows.
- To accurately model heat and mass transfer across liquid-gas interfaces.
Main Methods:
- Reformulated SPH conservation equations for mass, momentum, and energy.
- Incorporated Clausius-Clapeyron correlation for interface vapor mass fraction.
- Developed particle splitting/merging techniques for mass transfer.
Main Results:
- Simulations showed good agreement with analytical solutions for the Stefan problem.
- SPH results for drop evaporation compared favorably with level-set methods.
- Successfully predicted shape evolution, temperature, and vapor mass fraction during drop impact.
Conclusions:
- The proposed SPH method effectively simulates evaporating multiphase flows.
- The method accurately captures heat and mass transfer phenomena.
- Validated through diverse test cases including drop impact on hot surfaces.
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