Transmission and reflection of SV waves at micropolar solid–liquid interface with dual-phase lag theory

Khan, A. A.; Tanveer, S.

doi:10.1007/s12648-021-02056-7

Cited by 1 publication

(1 citation statement)

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“…The wetted coastal surface is composed of discrete sand grains which are drawn together by a large amount of interparticle cohesive forces. Recently, significant studies have been undertaken to develop closed-form formulations for various cohesive forces and other mechanical behaviours at the solid-liquid interface, such as auto-adhesion, friction, liquid binding and so on [28][29][30][31][32][33], but knowledge of their impact on the macroscopic behaviour of the wetted sand surface is still lacking. From the viewpoint of the microscopic surface structure, the movements of collided sand particles are determined by the cohesive forces among them, which can be presented as functions of their relative positions and velocities.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Simulation on Sand-Bed Collision Considering Surface Moisture Content

et al. 2021

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The process of aeolian sand transport is an important mechanism leading to the formation and evolution of local landforms in coastal areas and desert lakes. For a long time, the role of surface moisture in incipient motion of sand grains by wind stress has been extensively studied but, in fact, sand-bed collision is the main mechanism in steady aeolian sand flow. At present, the lack of understanding of surface moisture content on sand-bed collision limits the application of aeolian sand transport models in wet coastal areas. In this paper, we adopt numerical simulations to discuss and analyze the effect of cohesive forces formed by surface moisture content on the sand-bed collision process based on discrete element method. High density contact forces appear with the surface moisture increasing, and form a closed structure around the edge of crater to resist the avulsion in horizontal direction. Under high moisture condition, even though the ejected sand grains saltate away from the surface, the tension forces will prevent from leaving. The ejected number trend with incident velocity shows some nonlinear characteristics due to the unequally distributed force chains and liquid bridges in the unsaturated sand bed surface.

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Section: Introductionmentioning

confidence: 99%