CN106596350A - Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method - Google Patents
Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method Download PDFInfo
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- CN106596350A CN106596350A CN201611143347.7A CN201611143347A CN106596350A CN 106596350 A CN106596350 A CN 106596350A CN 201611143347 A CN201611143347 A CN 201611143347A CN 106596350 A CN106596350 A CN 106596350A
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- liquid
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- surface tension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
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
The present invention relates to a kind of support, more particularly, to a kind of utilization orifice plate biliquid planar survey surface tension of liquid
Support and measuring method.
Background technology
Surface tension is an important physical attribute of liquid, is the key factor for determining liquid level form.Liquid surface
The main method of testing of power can substantially be divided into two classes.One class is defined according to surface tension, is directly applied external force to liquid and is entered
Row test, these external force can be artificial applying, or gravity.Typical method has：Decylization method, hang piece method, maximum
Bubble platen press, drop-weight method etc..The model and method calculated in this kind of method used by surface tension is simple and clear, but operates more multiple
Miscellaneous, disturbing factor is more in test process.Another kind of is liquid level consistency profiles, that is, catch liquid solid geometry constraint under itself
Geometrical morphology profile is measuring.Common method has capillary tube method, sessile drop method, sessile drop method, poling board method etc..Due to this kind of side
Disturbing factor is less in method measurement process, in addition also often from the constraint of simple solid geometry, such as flat board and hole are constrained etc., because
This certainty of measurement is higher, and application is wider.
In liquid level consistency profiles, capillary tube method needs more fluid to be measured, and in capillary real liquid surface modeling
Also it is complex, calculate to stalagmometry and bring trouble.Generally need to define admittedly in the method such as sessile drop method and poling board method
The parameters such as liquid line of demarcation, liquid level outline line endpoint location and end points tangential angle, because of manual operation error and curve fitting technique
It is inaccurate that the reasons such as error cause end points and its tangent line to determine, can bring measure error.And in classical sessile drop method test, directly
It is relatively difficult to connect solution nonlinear equation and obtain surface tension analytic solutions, to avoid solving nonlinear equation, need to be led to
Cross and pre-build the method for the 1/H～S interpolation tables with regard to the droplet profile factor to facilitate later stage gauging surface tension force.Although this kind of
Liquid level consistency profiles can avoid constraining simplified physical modeling and its solving calculating from simple solid, but unavoidable in measurement process
There is gravitational field, the liquid profile equation that such theoretical modeling is obtained is often nonlinear equation, and it is have to solve nonlinear equation
Difficulty, this allows for this kind of method, and to compare first kind method more loaded down with trivial details in terms of later data process.Therefore, how liquid is retained
It is significantly to simplify measurement while facial contour method advantage and calculate for certainty of measurement and extension measurement range is improved.
It is equally utilized in the present invention that liquid level consistency profiles carrys out surface tension, measurement supporting structure used is simple, manufacturing cost
Low, fluid to be measured is few needed for measurement, it is adaptable to the test under the conditions of different vacuums, temperature, changing environment pressure etc..Except this
Outside, data processing is simple, it is only necessary to be fitted the outline line of the upper and lower liquid level top area of region two of support respectively, obtains upper and lower
The difference in height on the top radius of liquid level outline line and two liquid level outline line summits can just be calculated surface tension of liquid.
The content of the invention
A kind of support and measuring method of utilization orifice plate biliquid planar survey surface tension of liquid of the present invention, support includes：On
Orifice plate and π type base two parts.Wherein, one section of cylindrical tube is stretched out in up-hole plate central authorities lower section, and the through hole insertion of cylinder tube hub is whole
Individual up-hole plate, fills with fluid to be measured in hole during surface tension, and free surface is formed above and below hole.
To keep droplet position to stablize, orifice cross sectional pattern is from the one kind in following four pass：Cylinder straight pass, circle
Post ladder pass, epimere be circular cone hypomere for the pass of cylinder, epimere be sphere hypomere for cylinder pass.For cylinder straight hole
The hole of type, its aperture is 1～3mm, 4～16mm of depth；For cylinder shoulder hole, epimere be circular cone hypomere for cylinder hole, on
Section is three kinds of holes that sphere hypomere is cylinder, thereon the top edge 3～10mm of diameter of sector hole, and deep 1～3mm, hypomere cylindrical hole is straight
Footpath is 1～3mm, 4～16mm of depth, and the top edge diameter of upper sector hole should be greater than hypomere cylinder bore diameter.The upper table of up-hole plate
Face is parallel with the lower surface of cylindrical hole below.
π types base is fixedly connected with two pieces of two vertical plates being parallel to each other by one piece of horizontal plate and is constituted, for support
Orifice plate, and accept the tested drop that may fall.The height of its two vertical plates more than up-hole plate lower cylindrical length of tube 2～
6mm。
During measurement, up-hole plate is horizontally placed at into π types base top, then treats drips above the hole of up-hole plate
Drop enters aperture and after hole forms up and down two centrosymmetric free surfaces, using CCD from side will upper and lower two oneself
Recorded simultaneously in same picture by liquid level.During data processing, the outline line of upper and lower two liquid levels is fitted respectively, is obtained
Obtain top radius R of upper liquid facial contour line1, top radius R of lower liquid level outline line2, and the height on two liquid level outline line summits
Difference H, using formula surface tension of liquid γ is calculated：
Wherein, ρ is the density of fluid to be measured, and g is local gravitational acceleration.
During high temperature measurement, up-hole plate is horizontally placed at into π types base top, then tested solid particle fusion is placed in into aperture
Surface periphery, near aperture, to form upper and lower biliquid face after heating up.Intensification melts solid, treats that its thawing forms liquid
Aperture is entered afterwards and forms two centrosymmetric free surfaces up and down in hole.Then using CCD from side will upper and lower two oneself
Recorded simultaneously in same picture by liquid level.During data processing, the outline line of upper and lower two liquid levels is fitted respectively, is obtained
Obtain top radius R of upper liquid facial contour line1, top radius R of lower liquid level outline line2, and the height on two liquid level outline line summits
Difference H, is finally calculated surface tension of liquid γ using formula (1).
Description of the drawings
Fig. 1 is support schematic diagram.
In figure：The upper liquid levels of 1-；2- up-hole plates；Liquid level under 3-；4- π type bases.
Fig. 2 is cylinder straight pass up-hole plate.
Fig. 3 is cylinder ladder pass up-hole plate.
Fig. 4 be epimere for circular cone hypomere for cylinder pass up-hole plate.
Fig. 5 be epimere for sphere hypomere for cylinder pass up-hole plate.
Fig. 6 is to measure liquid-state silicon surface tension test chart at high temperature.
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings.
Embodiment 1
It is that circular cone hypomere is cylinder first by the epimere shown in Fig. 4 when measuring liquid-state silicon surface tension at high temperature
Pass up-hole plate is horizontally placed at the top of π types base 2, then the silicon solid particle of 3.4 grammes per square metres is placed in into periphery directly over aperture.Will
After whole support is put in high temperature furnace, sealing is evacuated to 10-5Bar, constant temperature after being warming up to 1450 degrees Celsius.Treat silicon solid particle
Melt and formed and enter after liquid aperture and form two centrosymmetric free surfaces up and down in hole.Then, with CCD from furnace chamber
Upper and lower two free surfaces are recorded (actual measurement liquid level figure such as Fig. 6 institutes in same picture simultaneously through observation glass pane for side
Show).
During data processing, the outline line of upper and lower two liquid levels is fitted respectively, obtains the top of upper liquid facial contour line
Radius R1With top radius R of lower liquid level outline line2Respectively 3.59mm and 2.46mm, the height difference H on two liquid level outline line summits
For 8.2mm, it is 2.42 × 10 to take liquid-state silicon density p near fusing point3kg/m3, it is 9.8N/kg to take local gravitational acceleration g, is adopted
It is 761mN/m to be calculated with formula (1) and obtain surface tension γ of the liquid-state silicon at 1450 degrees Celsius.
Claims (4)
1. a kind of support of utilization orifice plate biliquid planar survey surface tension of liquid, it is characterised in that：Support includes：Up-hole plate and π
Type base two parts；Wherein, one section of cylindrical tube is stretched out in up-hole plate central authorities lower section, and hole is entirely gone up in the through hole insertion of cylinder tube hub
Plate, fills with fluid to be measured in hole during surface tension, and free surface is formed above and below hole.
2. a kind of support of utilization orifice plate biliquid planar survey surface tension of liquid as claimed in claim 1, it is characterised in that：For
Droplet position is kept to stablize, orifice cross sectional pattern is from the one kind in following four pass：Cylinder straight pass, cylinder shoulder hole
Type, epimere be circular cone hypomere for the pass of cylinder, epimere be sphere hypomere for cylinder pass.For the hole of cylinder straight pass,
Its aperture is 1～3mm, 4～16mm of depth；For cylinder shoulder hole, epimere be circular cone hypomere be sphere for the hole of cylinder, epimere
Hypomere for cylinder three kinds of holes, the top edge 3～10mm of diameter of sector hole thereon, deep 1～3mm, hypomere cylinder bore diameter is 1～
3mm, 4～16mm of depth, and the top edge diameter of upper sector hole should be greater than hypomere cylinder bore diameter, under the upper surface of up-hole plate and its
The lower surface of the cylindrical hole of side is parallel.
3. a kind of support of utilization orifice plate biliquid planar survey surface tension of liquid as claimed in claim 1, it is characterised in that：π
Type base is fixedly connected with two pieces of two vertical plates being parallel to each other by one piece of horizontal plate and is constituted, and for supporting up-hole plate, and is held
Connect the tested drop that may fall.Lower cylindrical length of tube 2～6mm of the height of its two vertical plates more than up-hole plate.
4. the method for measuring surface tension of liquid using the support as described in claim 1-3 is arbitrary, it is characterised in that：Test
When, up-hole plate is horizontally placed at into π types base top, then by drips above the hole of up-hole plate, treat that drop enters aperture
And after hole forms up and down two centrosymmetric free surfaces, simultaneously remembered upper and lower two free surfaces from side using CCD
Record is in same picture；During data processing, the outline line of upper and lower two liquid levels is fitted respectively, obtains upper liquid facial contour
Top radius R of line1, top radius R of lower liquid level outline line2, and the height difference H on two liquid level outline line summits, using formula
It is calculated surface tension of liquid γ：
Wherein, ρ is the density of fluid to be measured, and g is local gravitational acceleration；
During high temperature measurement, up-hole plate is horizontally placed at into π types base top, then tested solid particle fusion is placed in into aperture and is just gone up
Square periphery, near aperture, to form upper and lower biliquid face after heating up；Intensification melts solid, treats that its thawing forms liquid laggard
Enter aperture and form two centrosymmetric free surfaces up and down in hole, then using CCD from side by upper and lower two free liquid
Face records in same picture simultaneously；During data processing, the outline line of upper and lower two liquid levels is fitted respectively, in acquisition
Top radius R of liquid level outline line1, top radius R of lower liquid level outline line2, and the height difference H on two liquid level outline line summits,
Finally surface tension of liquid γ is calculated using formula (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143347.7A CN106596350A (en) | 2016-12-13 | 2016-12-13 | Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143347.7A CN106596350A (en) | 2016-12-13 | 2016-12-13 | Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method |
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| CN106596350A true CN106596350A (en) | 2017-04-26 |
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| CN201611143347.7A Pending CN106596350A (en) | 2016-12-13 | 2016-12-13 | Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383979A (en) * | 2022-01-21 | 2022-04-22 | 四川大学 | Method for measuring surface tension coefficient of liquid by liquid drop method |
Citations (5)
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| DE102011009144A1 (en) * | 2011-01-19 | 2012-07-19 | Erich Miersemann | Device for measuring surface tension and boundary contact angle of liquid, involves using capillary rise method which measures increase in levels of liquid at outer capillary wall and inner capillary wall |
| CN103018138A (en) * | 2012-12-24 | 2013-04-03 | 江苏大学 | Method for measuring liquid surface tension based on axisymmetrical liquid drop profile curve and volume |
| CN104406889A (en) * | 2014-12-01 | 2015-03-11 | 四川大学 | Method for measuring surface tension coefficient of liquid through liquid drainage of semi-spherical shell with bottom hole |
| CN104458507A (en) * | 2014-12-01 | 2015-03-25 | 四川大学 | Method for measuring surface tension coefficient of liquid by injecting liquid into round tank |
| CN105300847A (en) * | 2015-11-25 | 2016-02-03 | 常州大学 | All-ceramic surface tension testing frame and all-ceramic surface tension testing method |
-
2016
- 2016-12-13 CN CN201611143347.7A patent/CN106596350A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011009144A1 (en) * | 2011-01-19 | 2012-07-19 | Erich Miersemann | Device for measuring surface tension and boundary contact angle of liquid, involves using capillary rise method which measures increase in levels of liquid at outer capillary wall and inner capillary wall |
| CN103018138A (en) * | 2012-12-24 | 2013-04-03 | 江苏大学 | Method for measuring liquid surface tension based on axisymmetrical liquid drop profile curve and volume |
| CN104406889A (en) * | 2014-12-01 | 2015-03-11 | 四川大学 | Method for measuring surface tension coefficient of liquid through liquid drainage of semi-spherical shell with bottom hole |
| CN104458507A (en) * | 2014-12-01 | 2015-03-25 | 四川大学 | Method for measuring surface tension coefficient of liquid by injecting liquid into round tank |
| CN105300847A (en) * | 2015-11-25 | 2016-02-03 | 常州大学 | All-ceramic surface tension testing frame and all-ceramic surface tension testing method |
Non-Patent Citations (2)
| Title |
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| 何静华 等: "《科学文丛 分子运动与自然美漫谈（47）》", 31 August 2003 * |
| 湖南省交通科学研究所 等: "沥青材料的表面张力系数及其测定方法", 《湖南师院学报(社会、自然科学综合版)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114383979A (en) * | 2022-01-21 | 2022-04-22 | 四川大学 | Method for measuring surface tension coefficient of liquid by liquid drop method |
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