Reconstruction of aeolian sand grain saltation based on inter-frame particle tracking algorithm and geometric constraints

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL Powder Technology Pub Date : 2025-04-15 Epub Date: 2025-02-12 DOI:10.1016/j.powtec.2025.120792

Kaiyuan Guan , Yang Zhang , Bin Yang , Yuanwei Lin , Xin Gao

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Abstract

The saltation trajectories of sand grains serve as a direct indicator of the two-phase interaction during the process of aeolian sand transport. Particle Tracking Velocimetry (PTV) has been employed to reconstruct these saltation trajectories. However, traditional PTV algorithms encounter difficulties due to the randomness and three-dimensional (3D) characteristics of sand-grain motion, which impede the complete reconstruction of saltation trajectories. This paper puts forward a PTV algorithm grounded on the Voronoi diagram (VD). It is demonstrated that this algorithm exhibits higher accuracy compared to other VD-based PTV algorithms. A homemade algorithm called Dual Angular Constraint (DAC) is introduced to support the proposed PTV algorithm, ensuring the most comprehensive reconstruction of saltation trajectories. Through a test using 3D artificial particle flows, the robustness of the proposed PTV algorithm in 3D space is validated. This validation offers the feasibility for the visualization of sand-grain motion in practical applications, accompanied by efficient and accurate kinematic analysis.

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基于帧间粒子跟踪算法和几何约束的风成沙粒跃变重建

沙粒的跃移轨迹是风沙输运过程中两相相互作用的直接指示。粒子跟踪测速法（PTV）被用来重建这些跃迁轨迹。然而，由于沙粒运动的随机性和三维性，传统的PTV算法遇到了困难，阻碍了跳跃轨迹的完全重建。提出了一种基于Voronoi图（VD）的PTV算法。与其他基于dvd的PTV算法相比，该算法具有更高的精度。为了支持PTV算法，引入了一种自制的对角约束（Dual Angular Constraint， DAC）算法，保证了最全面的跳跃轨迹重建。通过三维人工颗粒流实验，验证了该算法在三维空间中的鲁棒性。这为实际应用中沙粒运动的可视化提供了可行性，同时也提供了高效、准确的运动学分析。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.