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A method for simulating and predicting the suspension velocity of granular materials

A technology of granular material and speed, applied in the fields of agricultural machinery, pneumatic conveying, and fluidized bed, it can solve the problem of difficulty in measuring fluid flow rate, and achieve the effect of avoiding multiple purchases and repeated tests, and reducing test costs.

Active Publication Date: 2017-11-10
KUNMING UNIV OF SCI & TECH
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  • Description
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  • Application Information

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Problems solved by technology

[0003] When studying pneumatic sowing, conveying and seed cleaning, there are few studies on the measurement of particle group suspension velocity by simulation method
Moreover, when the particle volume fraction increases, it is difficult for the test to determine the fluid flow rate at this time

Method used

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  • A method for simulating and predicting the suspension velocity of granular materials
  • A method for simulating and predicting the suspension velocity of granular materials
  • A method for simulating and predicting the suspension velocity of granular materials

Examples

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Embodiment 1

[0032] Embodiment 1: as Figure 1-5 As shown, a method for simulating and predicting the suspension velocity of granular materials, first simulates the suspension test bench through three-dimensional modeling, measures the size of the conical cylinder of the key part of the test bench, and performs three-dimensional modeling of the conical cylinder according to the measured actual data, through The physical parameters of the granular material are measured, and the obtained 3D model of the conical cylinder and the physical parameters of the granular material are imported into the discrete element analysis software to complete the establishment of the particle field; the conical cylinder model is imported into the meshing software for meshing division; import the meshed conical cylinder model into the fluid mechanics software, set the boundary conditions of the flow field, and complete the establishment of the flow field; set the time step of the particle field simulation process...

Embodiment 2

[0046] Embodiment 2: as Figure 1-5 As shown, a method for simulating and predicting the suspension velocity of granular materials, taking the rare Chinese herbal medicine Panax notoginseng seed particles in Yunnan as an example, first simulates the suspension test bench through three-dimensional modeling, and measures the size of the conical cylinder of the key part of the test bench. The actual data is used for three-dimensional modeling of the conical cylinder, and the physical parameters of the granular material are obtained through measurement. The obtained three-dimensional model of the conical cylinder and the physical parameters of the granular material are imported into the discrete element analysis software to complete the establishment of the particle field; Import the cylinder model into the grid division software for grid division; import the meshed conical cylinder model into the fluid mechanics software, set the boundary conditions of the flow field, and complete...

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Abstract

The present invention relates to a method for simulating and predicting the suspension speed of particulate materials and belongs to fields of pneumatic conveying, agricultural machinery and fluidized beds. The method comprises: simulating a suspension test bed by means of three-dimensional modeling, then importing a three-dimensional tapered cylinder model and a physical parameter of particulate materials into a discrete element analysis software to complete establishing a particle field; importing the tapered cylinder model into a mesh division software to perform mesh division; importing the tapered cylinder model whose mesh is divided into a hydrodynamic software to complete establishing a flow field; by coupling the discrete element software with the hydrodynamic software, performing experimental simulation on the particle suspension speed to obtain the speed of the particulate materials and the speed of air flow when the suspension particles are in a suspension state; and performing post-processing and analysis on the obtained information of the speed of the particulate materials and the speed of air flow to obtain the particle suspension speed. According to the method for simulating and predicting the suspension speed of particulate materials, the suspension speed of the particulate materials at different volume fractions, which is hard to be observed in a test, can be conveniently predicted, and the test costs are reduced.

Description

technical field [0001] The invention relates to a method for simulating and predicting the suspension velocity of granular materials, and belongs to the technical fields of pneumatic conveying, agricultural machinery and fluidized beds. Background technique [0002] The measurement of particle group suspension velocity belongs to the problem of gas-solid two-phase flow. The study of gas-solid two-phase flow is widely used in pneumatic conveying, agricultural machinery, fluidized bed and other fields. Due to the particularity of granular media, it is different from fluid and solid , so the research on the particle system has become a hot research topic at home and abroad, and has very important scientific significance and engineering application value. [0003] When studying pneumatic sowing, conveying and seed cleaning, there are few studies on the measurement of particle group suspension velocity by simulation method. Moreover, when the particle volume fraction increases, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 赖庆辉高筱钧苏微周金华李莹莹迟琳芯
Owner KUNMING UNIV OF SCI & TECH
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