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Surface tension measuring method based on axisymmetric droplet contour curve

A profile curve and surface tension technology, applied in the direction of surface tension analysis, etc., can solve problems such as complex solution process, and achieve the effect of saving calculation time

Active Publication Date: 2019-06-21
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the drop shape method is to fit and solve each point on the droplet contour, which involves differential equations and optimization solutions, and the solution process is complicated

Method used

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  • Surface tension measuring method based on axisymmetric droplet contour curve
  • Surface tension measuring method based on axisymmetric droplet contour curve
  • Surface tension measuring method based on axisymmetric droplet contour curve

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the drawings and the following embodiments. It should be understood that the drawings and the following embodiments are only used to illustrate the present invention rather than limit the present invention.

[0033] In a specific embodiment of the present invention, an auxiliary platform is adopted, and an image acquisition device is used to shoot an image suspended under the surface of the auxiliary platform (see figure 1 ) or a droplet image tiled on an auxiliary platform (see figure 2 ), but as the present invention, an auxiliary platform is not necessarily required. In real life, the solid surface above the hanging drop can be pointed, irregular, or orifice-shaped, such as a needle tube, so as long as the image of the hanging drop is obtained, Or a tiled droplet image would suffice.

[0034] The image is processed to extract the droplet profile curve. Select two measurement points that are ...

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Abstract

The invention provides a surface tension measuring method based on an axisymmetric droplet contour curve. The method comprises the following steps: a tiled droplet image is taken, and a droplet contour curve is extracted; two measurement points not on the same horizontal plane are selected on the droplet contour curve; and the above geometric parameters associated with the selected two measurementpoints on the droplet contour curve are measured, and the surface tension of the liquid is calculated by using the following formula as described in the specifications. Through measurement on the geometric parameters of one point on the axisymmetric droplet surface and measurement on the associated liquid volume, the surface tension value can be simply obtained, no complex calculation is needed,and the calculation time is saved; and for an uneven surface tension condition, the surface tension of any point on the liquid can be simply obtained.

Description

technical field [0001] The invention belongs to the technical field of physical property measurement, and relates to a surface tension measurement method based on an axisymmetric droplet profile curve. Background technique [0002] Surface tension is one of the important thermophysical properties in fluid mechanics. It has an important influence on the heat transfer and mass transfer of fluid interface, as well as the flow and heat transfer of micro-channels, so it has become the focus of related research. The surface tension measurement can provide people with relevant information on the interaction between gas-liquid and liquid-liquid. Through this information, various important properties such as adhesion, infiltration, biocompatibility, lubrication, and adsorption of materials can be deduced, thereby providing important support for the development of related science and technology. [0003] The measurement methods mainly include the maximum bubble method, the maximum te...

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Application Information

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IPC IPC(8): G01N13/02
Inventor 杨莉萍王军钟秋雒彩云陶冶李会东汪文兵徐子君
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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