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Numerical simulation method of atomized film formation of suspension liquid material

A numerical simulation, suspension technology, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve problems such as difficulty in measuring liquid film thickness and droplet diameter, and complex material and liquid atomization process.

Active Publication Date: 2018-11-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 of atomized film formation of suspension liquid material
  • Numerical simulation method of atomized film formation of suspension liquid material
  • Numerical simulation method of atomized film formation of suspension liquid material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The numerical simulation method for the atomization of the suspension material into a film, 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] Using the modeling module (Design Model) in ANSYS Workbench to model the 3D model of the atomizing disc

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

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

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

[0036] b) The liquid pours continuously along the central axis of the pan;

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

[0038] B. Using the Euler-Eulerian method for modeling, both gas-liquid phases are treated as continuous phases. In order to describe the interpenetrating and continuous multi-phase flo...

Embodiment 2

[0051] This embodiment specifically introduces the numerical simulation method of the atomization process of steel shot prepared by molten metal, 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, speed 1500rpm, feed liquid flow rate 2.5kg / min, density 2590kg / m 3 , Viscosity 0.7Pa·s. The fluid volume function model of FLUENT software is selected 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, establish the finite element model of the atomizing disc and solve it. It should be noted that the present invention is based on the numerical simulation method of FLUENT in ANSYS Workbench. The basic method and steps are similar to the traditional method and step...

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Abstract

The invention provides a numerical simulation method of atomized film formation of suspension liquid material, and obtains the relationships among thickness of liquid film and each parameter through dimensional analysis and the linear least square regression analysis method. The liquid jet continuously impacts on an atomizing disk, and the liquid jet expands on the surface of the atomizing disk toform a film; and the liquid film leaves the atomizing disk along the tangent direction and breaks up to form ligaments or droplets. The computational fluid dynamics software FLUENT is used to performnumerical calculation on the process, therefore, the high cost and waste of raw materials caused by experiment or blind design are avoided, which has certain guiding significance for the atomizationmechanism of feed liquid.

Description

technical field [0001] The invention relates to a numerical simulation method for forming a film on an atomizing disk of a suspension material. Background technique [0002] Atomizing discs are widely used in the production of sprays, droplets, granules and powders. During nebulization, a liquid film forms on the disk, which breaks up 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 this method, these droplets produced can be solidified at high temperature to produce granules or powders. Various sizes of droplets or powders can be obtained using this method. The size of the droplet depends on the hydrodynamic forces of the liquid film formed on the disk and is directly related to the thickness of the liquid film. [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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
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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