Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method
A technology for measuring liquid surface tension and liquid level, which is applied in the field of stents and can solve problems such as difficulty in solving nonlinear equations and cumbersome data processing.
Inactive Publication Date: 2017-04-26
CHANGZHOU UNIV
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Problems solved by technology
Although this type of liquid level contour method can choose simple solids to avoid constraints to simplify physical modeling and solve calculations, there is inevitably a gravity field in the measurement process, so the liquid contour equations obtained by theoretical modeling are often nonlinear equations, and the solution to nonlinear The equation is difficult, which makes this type of method more cumbersome in post-data processing than the first type of method
Method used
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Embodiment 1
[0021] When measuring the surface tension of liquid silicon at high temperature, the Figure 4 The upper section shown is a conical hole and the lower section is a cylinder. The upper orifice plate is placed horizontally above the π-shaped base 2, and then 3.4 grams of silicon solid particles are placed on the periphery of the small hole. After putting the whole bracket into the high-temperature furnace, seal and evacuate to 10 -5 bar, after heating up to 1450 degrees Celsius, keep the temperature constant. After the silicon solid particles melt and form a liquid, they enter the small hole and form two centrosymmetric free liquid surfaces above and below the hole. Then, use the CCD to record the upper and lower free liquid levels in the same picture at the same time through the observation window glass from the side of the furnace cavity (the actual measured liquid level is shown in Figure 6 shown).
[0022] During data processing, the contour lines of the upper and lower ...
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Abstract
The invention relates to a bracket for measuring surface tension of a liquid by use of double liquid surfaces of a pore plate and a measurement method, in particular to a method for measuring the surface tension of a liquid with a liquid surface profile method. The used measurement bracket is simple in structure and low in manufacturing cost, requires a few measured liquids during measurement and is applicable to test under the conditions of different vacuum degrees, variable temperatures, variable environment pressure and the like. The bracket comprises an upper pore plate and a pai-type base, wherein a cylindrical tube stretches out of the center of the upper pore plate, a through hole in the center of the cylindrical tube penetrates through the whole upper pore plate, the hole is full of the measured liquid during surface tension measurement, and a free liquid surface is formed above and below the hole. Data processing is simple, all that is required is to fit profile lines of top areas of two liquid surfaces of the upper area and the lower area of the bracket respectively, and the surface tension of the liquid can be calculated as long as radii of tops of the profile lines of the upper and lower liquid surfaces and the height difference between vertexes of the profile lines of the two liquid surfaces are acquired.
Description
technical field [0001] The invention relates to a bracket, and more particularly relates to a bracket and a measuring method for measuring liquid surface tension by utilizing double liquid surfaces of an orifice plate. Background technique [0002] Surface tension is an important physical property of liquid and an important factor in determining the shape of liquid surface. The main test methods for the surface tension of liquids can be roughly divided into two categories. One is based on the definition of surface tension, directly exerting external forces on the liquid for testing. These external forces can be artificially applied or gravity. Typical methods are: off-ring method, hanging sheet method, maximum bubble pressure method, drop weight method, etc. The models and methods used to calculate surface tension in this type of method are simple and clear, but the operation is more complicated, and there are many interference factors in the test process. The other is th...
Claims
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IPC IPC(8): G01N13/02
CPCG01N13/02
Inventor 坎标孙涛丁建宁李征宇
Owner CHANGZHOU UNIV