Numerical Simulation Method for Atomization of Suspension Materials to Film Formation

A numerical simulation and suspension technology, applied in design optimization/simulation, special data processing applications, sustainable transportation, etc., can solve problems such as difficulty in measuring liquid film thickness and droplet diameter, and complex material and liquid atomization process. The effect of avoiding high costs and technical risks

Active Publication Date: 2022-07-12
SHANGHAI UNIV
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Problems solved by technology

[0003] Due to the complexity of the atomization process of the material liquid, it is extremely difficult to measure the thickness of the liquid film and the diameter of the droplet, and it is impossible to directly manufacture a device for testing in a large-scale industrial device. The empirical formula is used to predict, so that the actual design of the spray drying equipment always has this or that problem

Method used

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  • Numerical Simulation Method for Atomization of Suspension Materials to Film Formation
  • Numerical Simulation Method for Atomization of Suspension Materials to Film Formation
  • Numerical Simulation Method for Atomization of Suspension Materials to Film Formation

Examples

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Embodiment 1

[0030] The numerical simulation method of this suspension material atomization film formation, the specific operation steps are as follows:

[0031] (1) Use the 3D drawing software to draw the 3D geometric model of the atomizing disc:

[0032] Modeling the 3D model of the atomizing disc by using the modeling module (Design Model) in ANSYS Workbench

[0033] (2) Establish the finite element model of the atomizing disc and solve it. The specific methods are as follows:

[0034] A. Set the assumptions of numerical simulation;

[0035] a) The heat transfer between gas and liquid is not considered;

[0036] b) the liquid is poured continuously along the central axis of the disc;

[0037] c) In order to reduce the amount of calculation, a limited part of the air near the atomizing disc is included;

[0038] B. The Euler-Eulerian method is used for modeling, and both gas and liquid phases are treated as continuous phases. In order to describe the interpenetrating and continuous m...

Embodiment 2

[0051] This embodiment specifically introduces a numerical simulation method for the atomization process of molten metal to prepare steel shot, and the method at least includes the following steps:

[0052] First, use the modeling module (DM) in ANSYS Workbench to model the 3D model of the atomizing disc:

[0053] Diameter 75mm, rotating speed 1500rpm, material flow 2.5kg / min, density 2590kg / m 3 , viscosity 0.7Pa s. The fluid volume function model of the FLUENT software is used to capture the interface between the liquid phase and the gas phase. Create a new material in FLUENT and input relevant parameters according to the physical properties of the material, that is, to model the molten metal.

[0054] Secondly, the finite element model of the atomizing disc is established and solved. It should be noted that the present invention is a numerical simulation method based on FLUENT in ANSYS Workbench. Without further ado, the assumptions and theoretical basis of the present in...

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Abstract

The invention provides a numerical simulation method for the atomization of a suspension material to form a film, and obtains the relationship between the thickness of the liquid film and each parameter by means of dimension analysis and linear least square regression analysis. The liquid jet continuously impinges on the atomizing disk, the liquid jet spreads on the surface of the atomizing disk to form a film, the liquid film leaves the atomizing disk in a tangential direction, and breaks up to form ligaments or droplets. The computational fluid dynamics software FLUENT is used to numerically calculate the process, which avoids the high cost and waste of raw materials caused by experiments or blind design, and has certain guiding significance for the atomization mechanism of the feed liquid.

Description

technical field [0001] The invention relates to a numerical simulation method for film formation on an atomizing disc of a suspension material. Background technique [0002] Atomizing discs are widely used in the production of sprays, droplets, granules and powders. During the atomization process, a liquid film is formed on the disk, and the liquid film is broken into ligaments or droplets after leaving the edge of the disk. Atomizing discs are widely used in spray drying equipment, depending on the application of the method, these droplets produced can be solidified at high temperature to produce granules or powders, which can be obtained using this method of various sizes. The size of the droplets depends on the hydrodynamics of the liquid film formed on the disk and is directly related to the thickness of the liquid film. [0003] Due to the complex atomization process of the material and liquid, it is extremely difficult to measure the thickness of the liquid film and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23Y02T90/00
Inventor 朱远许京荆李盛鹏戚严文刘云飞叶天扬
Owner SHANGHAI UNIV
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