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Porous material for visual measurement of hydrodynamics and its preparation method and application

A technology of porous materials and fluid mechanics, which is applied to porous materials for visual measurement of fluid mechanics, as well as their preparation and application fields, to achieve the effects of adjustable shape, stable structure, and broadening of the Reynolds number sum.

Active Publication Date: 2021-05-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, in order to achieve accurate visual measurement of porous particles and fluids, it is necessary to establish a suitable macroscopic porous sphere model. After extensive literature research, the preparation of porous spheres that meet the fluid mechanics visualization experiment measurement faces many challenges. The preparation of porous spheres / bodies (not limited to spherical shapes) for visual measurement in fluid mechanics is still in the initial stage of research and development, therefore, there is an urgent need in this field to develop a porous sphere with the above properties

Method used

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  • Porous material for visual measurement of hydrodynamics and its preparation method and application
  • Porous material for visual measurement of hydrodynamics and its preparation method and application
  • Porous material for visual measurement of hydrodynamics and its preparation method and application

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Embodiment 1

[0070] Embodiment 1 porous material preparation

[0071] According to an embodiment of the present application, as shown in Table 1, glass beads with different monomer particle sizes are selected as secondary particles, and porous balls #1 to #12 are prepared according to the following steps S1 and S2.

[0072] S1: Coating a carbonized layer on the surface of glass beads;

[0073] In this step, the glass beads before coating the carbonization layer, such as figure 1 As shown, after wrapping as figure 2 shown.

[0074] In this step, a specific implementation manner is to use glass beads as the secondary particles.

[0075] In this step, another specific implementation manner is that metal balls or composite oxide balls may also be used as secondary particles.

[0076] In this step, another specific implementation is to use 0.1 mm metal balls to prepare porous balls.

[0077] In this step, another specific implementation is to use 0.5mm ceramic balls to prepare porous ball...

Embodiment 2

[0103] Example 2 Macro Visual Measurement in Fluid Mechanics

[0104] In the embodiment of the present application, a macroscopic high-speed camera (PTV) is used for the macroscopic visualization measurement device in fluid mechanics. Figure 9 shown. Get the single porous ball #5 obtained in Example 1, with the initial velocity as 0m / s (in order to ensure that the initial velocity is 0m / s, a manipulator is designed and processed at the tip of the release adjustment rod), and the initial release position is below the liquid surface to discharge The air bubbles in the pores of the hollow porous ball are free to settle in Newtonian fluids of different dynamic viscosities (the experimental tank has three sizes such as Figure 9 As shown in middle (b), the width of the main viewing surface of the experimental water tank cube is D, and the three sizes of water tanks D=150mm, 200mm or 250mm, such as Figure 9 shown to eliminate the influence of the wall effect).

[0105] For the ...

Embodiment 3

[0108] Example 3 Macro Visual Measurement in Fluid Mechanics

[0109] In the embodiment of the present application, a macroscopic particle image velocimeter (PIV) is used for a schematic diagram of a macroscopic visualization measurement device in fluid mechanics. Figure 10 shown. Rhodamine B-labeled microspheres were added as tracer particles, and the flow field around the porous spheres was successfully captured, such as Figure 13 with Figure 14 shown.

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PUM

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Abstract

The present application discloses a porous material used for macroscopic visualization measurement in fluid mechanics. The particle size of the porous material ranges from 10mm to 100mm; each particle of the porous material includes a plurality of secondary particles, and the particle size of the secondary particles is selected from 0.1 mm ~ 6mm. The present application also discloses a preparation method of a porous material for macroscopic visualization measurement in fluid mechanics, wherein a plurality of secondary particles with a particle diameter selected from 0.1 mm to 6 mm are bonded into a porous material with a particle diameter ranging from 10 mm to 100 mm. The porous ball of the present application has adjustable size, stable and uniform coloring, no influence on the properties of the material itself, less binder consumption, negligible influence of the binder on the pores of the formed porous ball, stable structure, and strength meeting the test requirements , the shape can be adjusted, etc., especially suitable for macroscopic visualization measurement in fluid mechanics.

Description

technical field [0001] The present application relates to a method for preparing a porous sphere / body for visual measurement in fluid mechanics and the porous sphere / body prepared by the method, more specifically, the present application relates to a method for preparing a macroscopic porous sphere for visual measurement in fluid mechanics The method for the porous sphere / body with controllable pore structure of the medium and the porous sphere / body prepared by the method belong to the field of fluid mechanics visualization measurement. Background technique [0002] The particle fluid system in the fluidized bed reactor is a very complex two-phase flow system, and the particles in the actual industrial fluidized bed reactor are most commonly various porous particles, the most typical ones are porous catalysts and fluid state Accurate measurement of the motion of porous particles is important for the design and control of fluidized bed reactors and multiphase flow processes. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 叶茂马丽坤丁亚徐庶亮刘中民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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