Numerical simulation method for air bubble curtain surrounding control dredged object

Abstract

The invention discloses a numerical simulation method for an air bubble curtain surrounding dredged object in the technical field of dredging engineering, and the method comprises the steps: carryingout the CFD modeling of the air bubble curtain surrounding dredged object, constructing a coupling model of VOF and DPM, and simulating a four-phase transient dynamic system of atmosphere, water, airbubbles and the dredged object; according to the engineering example, carrying out three-dimensional modeling and mesh generation, setting sources of a bubble curtain and a dredged object, setting boundary conditions and initial conditions, and solving a coupled CFD model; and finally, verifying a simulation result through a physical test. According to the CFD model, bidirectional coupling of bubbles, dredged objects and water is considered, free interface tracking of atmosphere and water is also considered, test verification is passed, and the result of the model is reliable; according to thenumerical method, data lacking in physical tests can be provided, the calculation cost is low, numerical tests under multiple scenes can be conveniently carried out, the movement rule of the dredgedobject under the combined action of the bubble curtain and the environment water flow is found, and the surrounding control effect and the failure condition of the bubble curtain on the dredged objectare evaluated.

Description

technical field [0001] The invention belongs to the technical field of dredging engineering, and more specifically relates to a numerical simulation method for enclosing and controlling dredged objects with air bubble curtains. Background technique [0002] During the process of dredging and dredging and filling overflow, the disturbance and diffusion of the original polluted bottom mud material or non-polluted native soil particles are intensified, and the suspended dredged matter produced will increase sharply in a short period of time, which will affect the surrounding areas to varying degrees. Pollution of waters. At present, a relatively simple measure to prevent the spread of suspended solids during dredging is to set up closed geotextile antifouling curtains around the dredging equipment or in the entire dredging area for environmental protection construction. The setting of this antifouling curtain can control the suspended solids to a certain extent However, due to...

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Problems solved by technology

However, numerical simulation methods for air curtain containment of dredged material are hardly found in the literature

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