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Pipeline fluid flow simulation method facing virtual chemical experiment teaching

A fluid flow, simulation method technology, applied in the field of computer simulation, to achieve the effect of visual simulation

Active Publication Date: 2015-10-21
南京运立仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simulation method for pipeline fluid flow oriented to virtual chemical engineering experiment teaching, to solve the simulation problem of the relationship between fluid flow state and pipe fitting state response in chemical engineering experiment, so as to achieve the goal of assisting experimental teaching and showing the experimental process and principle Purpose

Method used

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  • Pipeline fluid flow simulation method facing virtual chemical experiment teaching
  • Pipeline fluid flow simulation method facing virtual chemical experiment teaching
  • Pipeline fluid flow simulation method facing virtual chemical experiment teaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take the water passing through the DN15 single-piece ball valve in the DN15 (nominal diameter) stainless steel pipeline at 25°C as an example. The density of water at 25°C is 997kg / m 3 , the kinematic viscosity is 9.055*10 -7 m 2 / s, set the flow to 1*10 -3 m 3 / s, pipe length L 1 , L 2 is 0.5m, the valve flow coefficient A v is 1.13*10 -6 , during system development, set the initial point a 1 pressure P 1a is 0.1MPa, P 1b , P 2a , P 2b Both are 0MPa, and the system is released after adding scripts and particle systems. When running, click the mouse to control the opening of the ball valve. After opening, the b 1 The pressure value of the point P 1b (0MPa) less than a 1 pressure P 1a (0.1MPa), call the particle system, the fluid from a 1 point flows to b 1 point, take the valve opening as 1 / 10, and pass the relationship equation between the flow rate and the ball valve opening: Q / Q max =0.94x 3 -0.17x 2 +0.22x-0.01 calculates the flow velocity after...

Embodiment 2

[0027] Other conditions are the same as in Example 1. When the valve opening becomes 1 / 2, P is obtained by the same calculation. 2a The speed of the point u=0.99m / s, Re=1.64*10 4 , the flow pattern at this time is turbulent, and the system calls the code when Re≥4000 to realize the visual simulation of the turbulent flow of the pipeline fluid at this time, and the effect is as attached image 3 shown.

Embodiment 3

[0029] When the fluid changes into other substances, the realization method of the fluid flowing between the pipeline and the valve is as above. The simulation of the flow pattern can be realized only by changing the physical parameters of the corresponding fluid and using the same calculation method.

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Abstract

The invention discloses a pipeline fluid flow simulation method facing virtual chemical experiment teaching. A pipeline model composed of pipelines and a valve is established in 3ds max, each of the two ends of each pipeline is designated with a node, each node is added with an initial value, the valve which connects the two pipelines are taken as an event trigger object, and nodes on two ends of each pipeline and the event trigger object are added with trigger event script codes. During the system operation process, when the state of the event trigger object is changed, the node on one end of the pipeline calls the trigger event script, and subscribes to the initial value of the node on the other end, and changes the initial value of the node itself, the value of the node, of the next pipeline, being adjacent to the valve is changed through an association algorithm, and the corresponding trigger event is called according to the state of the event trigger object to achieve simulation. According to the invention, a fluid flow condition response relation which is simple and effective, and accords with the fact is established, visual simulation of pipeline fluid flow process and phenomenon is achieved, and the pipeline fluid flow simulation method can help users understand the fluid flow process.

Description

technical field [0001] The invention belongs to the field of computer simulation, and in particular relates to a simulation method of pipeline fluid flow oriented to virtual chemical experiment teaching. Background technique [0002] The chemical unit operation experiment is based on the background of chemical production. After the large-scale production equipment of the factory is miniaturized, it is used for experimental teaching and the cultivation and training of advanced applied and skilled talents. The chemical unit operation experimental device has a complex structure and is mostly made of stainless steel. During the experiment, due to the limitations of the invisible and non-removable inside of the device, it is often difficult for the experimental operators to understand the experimental process and principle. [0003] With the increasing improvement of computer simulation technology, the simulation and visualization of chemical unit experiments through simulation t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F9/455
Inventor 林军杨广玉李明海何佳艺汪祖洁孙露静
Owner 南京运立仪器有限公司