尼泊尔Syabrubesi洪水传播的三维模拟
Three-Dimensional Simulation of Flood Propagation at Syabrubesi, Nepal
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中文总结 AI 辅助
本研究通过不可压缩自由表面模型，在非结构化网格上求解Navier-Stokes方程，模拟尼泊尔Syabrubesi交汇处洪水传播，发现弯道处水流减速加深，而受限区域保持高速。
中文摘要 AI 辅助
本文使用不可压缩自由表面模型，研究了尼泊尔Syabrubesi地区Bhote Koshi--Langtang Khola交汇处的三维洪水传播过程。该计算受2026年8月洪水事件的启发，考察了给定入流通过局部弯道及河道宽度变化时的传播情况。在基于事件前地形数据构建的非结构化四面体网格上，求解了Navier--Stokes方程和界面输运方程。当入口流速为$10\\,\mathrm{m\\,s^{-1}}$时，计算结果表明表面流速超过$40\\,\mathrm{m\\,s^{-1}}$。推进的前缘在交汇处扩散；随着水流发展，弯道附近水深增加、流速减慢。在受限的上游和下游区域，较高的流速持续存在。
英文摘要
Three-dimensional flood propagation through the Bhote Koshi--Langtang Khola junction at Syabrubesi, Nepal, is studied using an incompressible free-surface model. The calculation is motivated by the August 2026 flood and examines the passage of an imposed inflow through the local bends and changes in channel width. The Navier--Stokes equations and an interface transport equation are solved on unstructured tetrahedral meshes constructed from pre-event terrain data. For an inlet speed of $10\,\mathrm{m\,s^{-1}}$, the solution indicates surface speeds above $40\,\mathrm{m\,s^{-1}}$. The advancing front spreads across the junction; as the flow develops, water deepens and slows around the bend. Higher speeds persist in the confined upstream and downstream regions.
发表机构
- George Mason University（乔治梅森大学）
机构由 AI 辅助整理，请以论文原文为准。
