Two-Phase Flow Modeling for Bed Erosion by a Plane Jet Impingement

Author:

Pham Van Bang DamienORCID,Uh Zapata MiguelORCID,Gauthier Georges,Gondret PhilippeORCID,Zhang WeiORCID,Nguyen Kim DanORCID

Abstract

This paper presents experimental and numerical studies on the erosion of a horizontal granular bed by a two-dimensional plane vertical impinging jet to predict the eroded craters’ size scaling (depth and width). The simulations help understand the microscopic processes that govern erosion in this complex flow. A modified jet-bed distance, accounting for the plane jet virtual origin, is successfully used to obtain a unique relationship between the crater size and a local Shields parameter. This work develops a two-phase flow numerical model to reproduce the experimental results. The numerical techniques are based on a finite volume formulation to approximate spatial derivatives, a projection technique to calculate the pressure and velocity for each phase, and a staggered grid to avoid spurious oscillations. Different options for the sediment’s solid-to-liquid transition during erosion are proposed, tested, and discussed. One model is based on unified equations of continuum mechanics, others on modified closure equations for viscosity or momentum transfer. A good agreement between the numerical solutions and the experimental measurements is obtained.

Funder

Ministère des Relations Internationales et de la Francophonie

Compute Canada

Natural Sciences and Engineering Research Council

Consejo Nacional de Ciencia y Tecnología

Publisher

MDPI AG

Subject

Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry

Reference51 articles.

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Investigation of dredging pattern due to changes in jet cross-section;Canadian Journal of Civil Engineering;2024-09-01

2. Research Status of Deep-Sea Polymetallic Nodule Collection Technology;Journal of Marine Science and Engineering;2024-04-29

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