Abstract
Movement of sand particles is a complicated phenomenon that occurs in nature. In this paper, the main goal is to provide an analytic model for the deposition profile of sand particles downstream of a fence. The analytic model was derived with respect to governing equations and shear flows for upstream and downstream regions. In this approach, we obtain a new expression for the downstream velocity of the fence, which allows for the determination of potential areas of deposition particles by assuming a log-normal distribution profile. A discrete-phase flow (DPM) was used to inject particles in the simulation domain. The DPM gives capabilities to capture spatiotemporal velocities components, as we can define the probability of deposition particles in the downstream of the fence. The proposed model was validated with a numerical model and experimental results. The comparison with field data and numerical results shows that the deposition profile is in acceptable agreement. With some assumptions and modifications about the properties of particles, the results of this research can be extended to snow accumulation downstream of a fence.
Highlights
Significant research has been conducted to investigate aeolian transportation of particles
A new analytic model was proposed to predict the profile of sand deposition in a downstream
A new analytic model was proposed to predict the profile of sand deposition in a downstream fence
Summary
Significant research has been conducted to investigate aeolian transportation of particles. One of the main challenges in calculating soil erosion rates, boundary layer turbulent parameters, and probability of sand transport is the choosing of averaging time [1]. Wind and erosion influence the shape of sand particles; desert sands are more rounded and denser than coastal sand particles [5]. Wind makes the movement of sand particles that occurs through creep, saltation, and suspension processes (Figure 1) [6,7]. Larger sand particles move through creeping on the surface, the majority move through saltation, which uplifts them into the air when striking the surface, and smaller particles are suspended in the air and are transported long distances in the air
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