Simulating method of numerical value of sediment movement of silty and muddy coast

A technology of sediment movement and numerical simulation, which can be used in fluid dynamics experiments, measuring devices, instruments, etc., and can solve problems such as complex water and sand movement.

Inactive Publication Date: 2012-02-22
HOHAI UNIV
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Problems solved by technology

Therefore, for the large-scale sea area of ​​Lianyungang, due to the coexistence of muddy coast and silty coast, the movement of water and sand is very complicated, which is a difficult point in the study of coastal sediment movement.

Method used

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  • Simulating method of numerical value of sediment movement of silty and muddy coast
  • Simulating method of numerical value of sediment movement of silty and muddy coast
  • Simulating method of numerical value of sediment movement of silty and muddy coast

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Experimental program
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Effect test

Embodiment

[0067] Example: Analyze and explain the sediment movement in the shoals in the sea area from Lianzikou to Guanhekou in Lianyungang.

[0068] first as Figure 8 Shown, the simulation method flow process of the present invention is as follows:

[0069] (1) Establish a mathematical model:

[0070] The water flow continuity equation, water flow motion equation, suspended mass transport and diffusion equation, and bed surface filling change equation are established, as shown in equations (1), (2), (3), and (4).

[0071] (2) Handling of key issues:

[0072] Shen speed calculation

[0073] Suspended sediment settling velocity is not only an important parameter affecting the calculation of sediment concentration, but also the basis for reflecting the properties of sediment in water bodies. According to previous studies, sand concentration is the most critical factor affecting sinking velocity. For median particle size less than 63μm and sand content less than 10kg / m 3 For sedi...

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Abstract

The invention discloses a simulating method of numerical values of sediment movement of silty and muddy coast. The simulating method mainly comprises the following steps of: step one. establishing basic equations which comprise a water current continuity equation, a water current movement equation, a suspended load transporting and diffusing equation and a bed surface scouring and silting variation equation; step two. calculating the shearing stress of a bed surface under the combined action of settling velocity of suspended sediment, scouring and silting functions of sediment and wave currents; step three. establishing a sediment mathematical model and solving; step four. verifying the model, including water current verification and sand content verification; and step five. judging a settling velocity field of the suspended sediment according to the sediment mathematical model. According to the simulating method, the sediment mathematical model is established on the basis of considering the characteristics of muddy and silty sediment, and the movement of two different types of sediment can be simulated simultaneously; and more than that, the established sediment mathematical model also can be used for calculating the settling velocity field of the suspended sediment; and accordingly, the characteristics of a region and influence factors are analyzed and researched.

Description

technical field [0001] The invention relates to a method for numerically simulating sediment movement on silty and muddy coasts, and belongs to the technical field of numerical simulation of sediment movement. Background technique [0002] In recent years, with the rapid improvement of my country's economic strength, the construction and development of port waterways are facing huge demands and opportunities. The coastline with good natural conditions has been fully developed, and the construction focus of port channel engineering has gradually shifted to muddy coast and silty coast. Due to the gentle slope, shallow water and complex dynamics, the problem of sediment back-silting on muddy coasts and silty coasts is more prominent, which brings certain difficulties to the construction and maintenance of port channel engineering. main concern. [0003] At present, there are many studies on sediment movement in muddy shoals at home and abroad, and the port construction techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
Inventor 张玮安翔徐卓申其国李国臣
Owner HOHAI UNIV
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