The impact of inter-dune space and volume ratio on barchan dune collision patterns: A numerical simulation study
Author:
Lin YuanweiORCID,
Guan KaiyuanORCID,
Zhang YangORCID,
Gao XinORCID,
Yang BinORCID,
He NanORCID
Abstract
Collision among barchan dunes is a main cause for the dune swarm to achieve size and speed selection, and it can be divided into two patterns: coalescence and ejection. Here, a three-dimensional (3D) cellular automaton model is applied to collectively study the effects of inter-dune space and relative dune size on these collision patterns. A parameter space is established that includes a transition surface distinguishing coalescence and ejection. Confirmed by field observations and subaquatic experiments, a comprehensive depiction of transition between coalescence and ejection is provided, which may bring new constraints on the morphodynamics of barchan dune fields.
Funder
Xinjiang Tianshan Talent Program
Shaanxi Key Science and Technology Innovation Team Project
National Natural Science Foundation of China
China Scholarship Council
Subject
Condensed Matter Physics,Fluid Flow and Transfer Processes,Mechanics of Materials,Computational Mechanics,Mechanical Engineering
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