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Fluent UDF-based wave generation method for numerical wave water tank

A sink and wave technology, applied in CAD numerical modeling, electrical digital data processing, instruments, etc., can solve the problem of eliminating wave reflection and other problems, and achieve the effect of stable solution, wide application range and efficient modeling

Inactive Publication Date: 2020-06-05
DALIAN UNIV OF TECH
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Problems solved by technology

In recent decades, many achievements have been made in the study of wave numerical tanks. Ursell et al proposed the method of numerical wave generation using a push plate wave machine. This theory is based on the basic assumptions of typical fluid mechanics, such as fluid inviscidness, uniform density, Flow from stillness, nonlinear term neglect, etc., but did not solve the effect of eliminating wave reflection at the time

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  • Fluent UDF-based wave generation method for numerical wave water tank
  • Fluent UDF-based wave generation method for numerical wave water tank
  • Fluent UDF-based wave generation method for numerical wave water tank

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Embodiment Construction

[0036] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions, and compared with the BEM method and theoretical values.

[0037] The first step is to use the basic idea of ​​the push-plate wave maker model established by the boundary element method, construct the wave-making plate in FLUENT, and write the wave-making function UDF file.

[0038] The second step is to divide the model grid, set the boundary conditions, load the UDF file, and select the appropriate solver.

[0039] The third step is to calculate and check the resulting data, and the comparative analysis of the data is as follows.

[0040] Figure 3-4 The middle abscissa is the dimensionless time The ordinate is the dimensionless wave amplitude η / H. g is the acceleration due to gravity, and H is the water depth. From image 3 It can be seen that the BEM results in In the future, it basically matches the theo...

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Abstract

The invention belongs to the technical field of wave numerical water tanks, and provides a fluent UDF-based wave generation method for a numerical wave water tank. According to the method, a basic thought of a push plate type wave maker model established by a boundary element method is adopted; a new wave generation function and a new wave elimination algorithm are established, in secondary development of FLUENT software based on a Navier-stokes equation, a dynamic grid technology of FLUENT is adopted for the boundary of a wave generation plate, only speed boundary conditions are established,pressure and speed items are not coupled, and therefore the stability is higher. Similarly, wave damping layers are additionally arranged at the far ends of the wave making plate and the wave numerical water tank, and only speed items are absorbed. In research, a VOF method is applied to track free surface motion of waves. By applying the wave generation method of the wave numerical water tank, the problem of interaction between complex nonlinear waves and structures can be studied.

Description

technical field [0001] The invention belongs to the technical field of wave numerical water tanks, and uses a Fluent UDF method to form a wave-making method for wave numerical water tanks. Background technique [0002] The numerical wave-making technology of the wave numerical tank is an important means of simulating physical wave-making by using computer technology. Through the research of numerical wave-making technology, people can simulate the wave movement with free surface under the action of gravity on the computer, making it close to the waves formed by physical wave-making machines. In recent decades, many achievements have been made in the study of wave numerical tanks. Ursell et al proposed the method of numerical wave generation using a push plate wave machine. This theory is based on the basic assumptions of typical fluid mechanics, such as fluid inviscidness, uniform density, Flowing from rest, ignoring nonlinear terms, etc., but the effect of eliminating wave...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F111/10G06F113/08G06F119/14
Inventor 王科张犀贺大川辛颖
Owner DALIAN UNIV OF TECH
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