Method for measuring and calculating regulation scale of artificial fish shelter flow field
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An artificial reef and scale technology, applied in the field of measurement and calculation, can solve the problem that the method of measuring and calculating the control scale of the artificial reef flow field cannot meet the needs of measurement and calculation
Inactive Publication Date: 2010-04-14
SHANGHAI OCEAN UNIV
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[0004] The technical problem to be solved in the present invention is that the existing method for measuring and calculating the control scale of the artificial ree...
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Embodiment 1
[0027] Three-dimensional numerical simulation of single reef flow field
[0028] 1. Taking the back-shaped reef of 3m×3m×3m as an example, a three-dimensional model of the artificial reef is established in the computer-aided design software Solidworks;
[0029] 2. A 120m * 20m * 25m cuboid three-dimensional numerical water tank model is set (that is, the numerical water tank is long 120m along the water inflow direction, wide 20m, deep 25m), and the three-dimensional numerical water tank model is provided with a water flow inlet surface, a water flow outlet surface, The first side, the second side, the top and the bottom, the above-mentioned single reef body model is set in the described cuboid three-dimensional numerical tank model, the upstream surface of the single reef body model is 30m away from the water flow inlet surface; Water outlet surface 87m;
[0030] 3. Set the properties of each surface of the cuboid 3D numerical tank model:
[0031] Water flow inlet surface (...
Embodiment 2
[0041] Three-dimensional numerical simulation of multi-fish reef combined flow field
[0042] ①. Arrange nine 3m×3m×3m square reefs in the shape of a reef, with a distance of 3m between each reef, and establish an artificial fish reef multi-fish reef group reef model in the computer-aided design software Solidworks;
[0043] 2. A 120m * 35m * 25m cuboid three-dimensional numerical water tank model is set (that is, the numerical water tank is 120m long along the water inflow direction, wide 35m, deep 25m), and the three-dimensional numerical water tank model is provided with a water flow inlet surface, a water flow outlet surface, The first side, the second side, the top and the bottom, the above-mentioned multi-fish reef combination model is set in the described cuboid three-dimensional numerical tank model, and the multi-fish-reef combination group reef model's upstream surface is 30m away from the water flow inlet surface; The backflow surface of the fish-reef combination mo...
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Abstract
The invention belongs to the technical field of measurement and calculation, and relates to a method for measuring and calculating the regulation scale of an artificial fish shelter, aiming at solving the problem that the existing method for measuring and calculating the regulation scale of the artificial fish shelter flow field can not meet the requirements of measurement and calculation. The invention provides a measuring and calculating method which comprises the steps of: carrying out three-dimensional shaping on an artificial fish shelter by computer aided design, arranging a fish shelter monomer or a multi-fish shelter complex into a numerical flume, conducting three-dimensional grid subdivision on the numerical flume, importing grid data into a common CFD software, selecting a large-eddy simulation on turbulence modeling, numerically simulating the flow field change of the fish shelter after putting, and analyzing the output calculation results, thus being capable of obtaining the differences of characteristic dimension of flow fields such a slow flow area, an upward flow area and the like under different types of conditions of fish shelters, water depth, shelter combinations and the like. The method is used for measuring and calculating the flow field regulation scales of different types of shelter bodies and shelter body combination under different water depths and flow velocities, and provides scientific data for optimization and configuration of the fish shelter monomer design and the multi-shelter combination scheme.
Description
technical field [0001] The invention belongs to the technical field of measurement and calculation, and relates to a method for measuring and calculating the control scale of the combined flow field of a sunken artificial fish reef single reef body and multiple reef bodies. Background technique [0002] Artificial fish reefs are structures artificially placed in the sea to improve the ecological environment of sea areas and increase fishery resources. In the new century, all coastal areas of our country are building their own artificial reef projects to varying degrees. In order to maximize the efficiency of flow field regulation and achieve the expected design purpose of the artificial reef, it is particularly important to measure and calculate the flow field regulation scale of the reef. After the artificial reef is placed on the seabed, it will generate an upwelling flow on the side of the upstream surface and a back vortex on the side of the backflow surface due to the ...
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