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SPH numerical simulation of non-steady sand ripple wind-sand flow structure
Xiao Hu1, Afang Jin2, Reyihanguli Musa1
1College of Mechanical Engineering, Xinjiang University, Urumqi, 830047, China.
The European Physical Journal. E, Soft Matter
|February 7, 2022
Summary
Smoothed Particle Hydrodynamics (SPH) simulates wind-sand flow, offering advantages over grid methods for complex sand ripple dynamics. This particle-based approach accurately models sand movement and ripple formation, validating its effectiveness for erosion research.
Area of Science:
- Computational Fluid Dynamics
- Geomorphology
- Particle Physics
Background:
- Traditional grid-based methods struggle with large deformations in fluid dynamics simulations.
- Wind-sand flow involves complex two-phase interactions and particle dynamics.
- Sand ripples significantly influence wind-sand flow patterns and erosion.
Purpose of the Study:
- To numerically simulate unsteady sand ripple wind-sand flow using the Smoothed Particle Hydrodynamics (SPH) method.
- To analyze the advantages of SPH over grid-based methods for simulating large deformations and two-phase flows.
- To investigate the formation and development of wind-sand flow and particle saltation.
Main Methods:
- Employed the Smoothed Particle Hydrodynamics (SPH) method for numerical simulation.
- Discretized the SPH numerical model for sand ripple wind-sand two-phase flow.
- Focused on applying core SPH formula factors to the simulation program.
Main Results:
- Simulated temporal and spatial changes of sand particles on slopes during wind-sand movement.
- Analyzed macro-scale wind-sand flow development and micro-scale particle saltation.
- Results showed consistency with existing wind tunnel experiments, verifying SPH accuracy.
Conclusions:
- The SPH method provides high calculation accuracy for wind-sand flow simulations.
- SPH offers unique advantages for modeling two-phase flows with large deformations.
- This research provides a theoretical basis for studying and preventing sand damage.
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