Abstract
The study investigates the dispersal range of dandelion seeds influenced by wind, considering fruit ripening and invasive species’ impact. CFD fluid dynamics simulation using Ansys Fluent software, integrating Navier-Stokes equations and turbulence theory, analyzes seed motion characteristics and dispersion dynamics in an ideal fluid domain. Parameters like air density and viscosity, representing various seasons, were adjusted in diffusion range across different time scales.We obtained the approximate distribution of dandelion seeds across different seasons and climates, finding larger dispersal areas in arid climates due to stronger winds. In comparison, temperate climates exhibit smaller areas due to gentler winds. To assess the impact of an alien plant on the local environment, we constructed judgment criteria using the Analytical Hierarchy Process (AHP). Through pair-wise comparisons, we calculated weightings for criteria encompassing environmental interference, economic influence, and effects on human health. By assigning ratings to each criterion based on logical reasoning and scientific evidence, we quantified the plant’s impact, yielding a score of 5.74 out of 10 for dandelion, indicating an overall positive effect in the community. Sensitivity testing confirmed the robustness of our model.
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