Physical simulation device for water-sediment two-phase flow field in vegetation group and simultaneous monitoring method

Abstract

The invention discloses a physical simulation device for water-sediment two-phase flow field in a vegetation group. The device comprises a water tank, a camera and an illuminating lamp are arranged above the water tank, the bottom of the water tank is upwards connected with a plurality of vegetation simulation columns made of transparent vulcanized rubber, and the hardness of the vegetation simulation columns is the same as that of a simulation object; the device also comprises first tracer particles used for simulating the movement state of sediment particles, and second tracer particles usedfor simulating the movement state of water; and the first tracer particles are made by spraying fluorescent dye on transparent quartz sand particles, the second tracer particles are made of a yellownylon material, and a yellow optical filter is arranged at the position of a lens of the camera, so that interference is filtered out. The invention can solve the problem that a water-sediment two-phase flow field simulation experiment cannot be conducted due to the fact that vegetation blocks light can be solved. The first tracer particles are both tracer particles and tracer objects, and can avoid turbidity of a water body; and the particle size of the first tracer particles is different by hundreds of times from the particle size of the second tracer particles. According to the invention, obstacles are cleared for a water-sand two-phase flow field simulation experiment.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a physical simulation technology of a water-sand two-phase flow field in a vegetation group. Background technique [0002] The presence of vegetation can reduce the speed of passing water, thereby promoting sedimentation. Vegetation groups play an important role in blocking floods, soil and water conservation, and purifying water bodies. [0003] In the laboratory, it is necessary to explore the two-phase flow of water and sand inside under different vegetation arrangements (vegetation density, height, flexibility, diameter, etc.). [0004] However, because the existence of vegetation will block the flow of water and sand inside, it is impossible to observe the flow field at the vegetation group by conventional means. Moreover, due to the presence of sediment, the water body is abnormally turbid, which makes it more difficult to observe the movement of wat...

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Problems solved by technology

[0004] However, because the existence of vegetation will block the internal flow of water and sand, it is impossible to observe the flow field at the vegetation group by conventional means.

Moreover, due to the presence of sediment, the water body is abnormally turbid, making it more difficult to observe the movement of water flow and the movement of sediment particles at the same time.

[0005] When using tracer particles to track the movement of sand grains, there are obvious differences between tracer particles and sand grains due to their physical parameters such as density and hardness. As a result, the motion state of tracer particles cannot be accurate and the motion state of sand grains cannot be eliminated. The resulting experimental error

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