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

Abstract

The invention discloses a physical simulation device for water-sand two-phase flow field in a vegetation group, which includes a water tank, a camera and a lighting lamp are arranged above the water tank, and several vegetation simulation columns made of transparent vulcanized rubber are connected upwards to the bottom of the water tank. The hardness of the simulation column is the same as that of the simulated object; it also includes the first tracer particles for simulating the motion state of sediment particles and the second tracer particles for simulating the motion state of water; the first tracer particles are transparent The quartz sand particles are sprayed with fluorescent dyes, the second tracer particles are made of yellow nylon material, and the lens of the camera is equipped with a yellow filter to filter out interference. The invention can solve the difficult problem that the water-sand two-phase flow field simulation experiment cannot be carried out due to vegetation blocking the light. The first tracer particles are both tracer particles and tracer objects, and can also avoid water turbidity; the first and second tracer particles The particle size differs by hundreds of times, and the invention clears the obstacles for the simulation experiment of the water-sand two-phase flow field.

Description

technical field [0001] The invention relates to the technical field of hydraulic 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, conserving soil and water, and purifying water bodies. [0003] In the laboratory, it is necessary to explore the two-phase flow of water and sand in the interior of different vegetation arrangements (vegetation density, height, flexibility, diameter, etc.). [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 existence of sediment, the water body is abnormally turbid, making it more difficult to observe the movement of water flo...

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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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