CN103744446A - Control method for changing liquid drop collision state by using temperature change - Google Patents
Control method for changing liquid drop collision state by using temperature change Download PDFInfo
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- CN103744446A CN103744446A CN201410012100.6A CN201410012100A CN103744446A CN 103744446 A CN103744446 A CN 103744446A CN 201410012100 A CN201410012100 A CN 201410012100A CN 103744446 A CN103744446 A CN 103744446A
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Abstract
The invention relates to a control method for changing the liquid drop collision state by using temperature change, which is characterized in that liquid drops to be collided are heated or cooled; when the temperature of the liquid drops rises, the liquid drops which should be bounced off each other are aggregated easily; when the temperature of the liquid drops drops, the liquid drops which should be aggregated are bounced off each other easily. Compared with the prior art, the control method can be applied to the fields of ink-jet printing, surface spraying, oil-jet combustion and the like, the quality and efficiency of industrial production can be improved, and meanwhile, the control method can be used for providing technical support in application of the high and new technology fields, such as microfluidics, micro-manufacturing and micro-biochemical reaction.
Description
Technical field
The invention belongs to physics applied technical field, by utilizing the collision status of temperature control break drop to drop in gaseous environment, reach and improve product quality, improve the utilization factor of the energy and micro-fluidic, micro-manufacture, the object of the contour frontier application of micro-biochemical reaction.
Background technology
The collision status problem of drop is the major issue of paying close attention in the life of people's commercial production always.If for example prepared Chinese ink drop does not form image blurring unclear that good fusion can cause printing on paper in the process of inkjet printing, thereby cause the loss of information; If in Electronic Packaging process, electroplate for another example that flicking appears in the copper drop of use or not well fusion can cause the inhomogeneous of copper cash or even produce breakpoint, product is produced to harm greatly; And for example in the process of oil jetting combustion, the collision of oil droplet has a significant impact burning efficiency, controls rational collision status and can effectively improve burning efficiency, improves energy utilization rate.
Existing control device is all to change its collision status by the impact velocity of drop and collision angle, but not necessarily can utilize merely impact velocity and collision angle to change the collision status of drop in real commercial production life, and the difference of temperature is to be prevalent in the middle of these productive lifes, the collision status that reasonably utilizes temperature variation to change drop can effectively improve production technology, Improving The Quality of Products, improves energy utilization rate.The collision status that simultaneously utilizes temperature variation to change drop can be also micro-fluidic effectively, micro-manufacture, and the contour frontier of micro-biochemical reaction provides technical support.
Summary of the invention
Object of the present invention is exactly to provide a kind of control method of utilizing temperature variation that droplet collision state is changed in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions: a kind of control method of utilizing temperature variation that droplet collision state is changed, it is characterized in that, the gaseous environment temperature at heating or drop cooling to be collided place, when drop temperature raises, can make the drop that should mutually flick become easy polymerization, when drop temperature reduces, can make mutually the drop of polymerization become easily and flick.
The gaseous environment at described drop to be collided place is for being placed in solid surface by band collision drop, and described solid surface is metal surface, inorganic non-metallic surface, polymer surfaces or composite surface, and heating or cooling solid surface change gaseous environment temperature.
The gaseous environment at described drop to be collided place is pure gaseous environment, comprises air, nitrogen, hydrogen; Heating or the cooling container that gas is housed are controlled the temperature of the drop that is placed in this gas.
The collision that the collision of described drop can be dual drop also can be the collision of many drops.
Shifting gears as directly heating or cooling heat transmission, photo-thermal conversion, electric heating transform the mode of multiple change drop temperature of described drop temperature.
The temperature of described drop raises as the rising of any single or multiple drop temperature.
Described drop comprises the single-phase or heterogeneous drop that in water droplet, organic liquid phase drop, molten drop and solution droplets, emulsion drop, suspension drop, many kinds of substance mixes.
Described organic liquid phase drop comprises toluene, ethanol or alkanes; Described molten drop comprises copper, iron or aluminium.
The probability that described easy polymerization shows as polymerization increases, and also shows the time shorten of polymerization.
Compared with prior art, the present invention has following advantage:
(1) control merely temperature variation and can change the collision status of drop.
(2) introducing of temperature can make some irrealizable micro-manufactures originally, and micro-biochemical reaction etc. become possibility.
(3) temperature increase can be accelerated drop fusion speed, is conducive to improve product quality.
Accompanying drawing explanation
Fig. 1 is the meet and discuss graph of a relation of droplet collision polymerization probability and temperature of super hydrophobic surface top.
Fig. 2 is the high-speed camera picture that super hydrophobic surface top is met and discussed under droplet collision different temperatures.
Embodiment
Below in conjunction with concrete case study on implementation, the super hydrophobic surface drop head take silicon chip as substrate is met and discussed, and as example, the invention will be further described in collision.
Embodiment 1
At contact angle, be that on the super hydrophobic surface of 154 °, a drop is fixed on its super hydrophobic surface, another drop from directly over drippage, two drops are all 25 ℃, when the relative velocity of drop is 0.3m/s, its probability mutually flicking is 34%.Under identical relative velocity, if by the temperature increase of top drop wherein, the probability of polymerization of fluid drops can improve rapidly, and when the temperature of top drop is 27 ℃, 30 ℃, in the time of 32 ℃, the probability of its polymerization is 58%, 80%, 90%.When temperature is elevated to 35 ℃, it can absolutely condense together.In order to highlight the impact of temperature variation on droplet collision, carried out another group experiment.The temperature that simultaneously improves two drops is 27 ℃, and 30 ℃, in the time of 32 ℃, the probability of its polymerization is 66%, 96%, 96%, and when temperature is elevated to 35 ℃, it can absolutely condense together.As shown in Figure 1.
Embodiment 2
At contact angle, be on the super hydrophobic surface of 154 °, a drop is fixed on its super hydrophobic surface, another drop from directly over drippage, when being fixed on the drop of super hydrophobic surface, it is 25 ℃, the drop temperature of top is respectively 25 ℃, and 40 ℃, in the time of 50 ℃, its time of fusion can significantly shorten, and from 12 to 15 milliseconds are reduced to 0 to 3 millisecond.As shown in Figure 2.
Claims (9)
1. a control method of utilizing temperature variation that droplet collision state is changed, it is characterized in that, the temperature of heating or drop cooling to be collided, when drop temperature raises, can make the drop that should mutually flick become easy polymerization, when drop temperature reduces, can make mutually the drop of polymerization become easily and flick.
2. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, it is characterized in that, the gaseous environment at described drop to be collided place is for to be placed in solid surface by drop to be collided, described solid surface is metal surface, inorganic non-metallic surface, polymer surfaces or composite surface, and heating or cooling solid surface change gaseous environment temperature.
3. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, is characterized in that, the gaseous environment at described drop to be collided place is pure gaseous environment, comprises air, nitrogen, hydrogen; Heating or the cooling container that gas is housed are controlled the temperature of the drop that is placed in this gas.
4. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, is characterized in that, the collision that the collision of described drop can be dual drop also can be the collision of many drops.
5. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, it is characterized in that the shifting gears as directly heating or cooling heat transmission, the mode that photo-thermal transforms, electric heating transforms multiple change drop temperature of described drop temperature.
6. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, is characterized in that, the temperature of described drop raises as the rising of any single or multiple drop temperature.
7. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, it is characterized in that, described drop comprises the single-phase or heterogeneous drop that in water droplet, organic liquid phase drop, molten drop and solution droplets, emulsion drop, suspension drop, many kinds of substance mixes.
8. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 7, is characterized in that, described organic liquid phase drop comprises toluene, ethanol or alkanes; Described molten drop comprises copper, iron or aluminium.
9. a kind of control method of utilizing temperature variation that droplet collision state is changed according to claim 1, is characterized in that, the probability that described easy polymerization shows as polymerization increases, and also shows the time shorten of polymerization.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410012100.6A CN103744446B (en) | 2014-01-10 | 2014-01-10 | The control method utilizing temperature variation to make droplet collision state to change |
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| CN201410012100.6A CN103744446B (en) | 2014-01-10 | 2014-01-10 | The control method utilizing temperature variation to make droplet collision state to change |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2058130A1 (en) * | 2007-11-09 | 2009-05-13 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Droplet selection mechanism |
| CN102304236A (en) * | 2011-07-08 | 2012-01-04 | 唐东波 | Emulsion antioxygen and preparation method thereof |
| CN103459157A (en) * | 2011-02-11 | 2013-12-18 | 马肯依玛士公司 | New method for stimulation range detection in continuous ink jet printer |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2058130A1 (en) * | 2007-11-09 | 2009-05-13 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Droplet selection mechanism |
| CN103459157A (en) * | 2011-02-11 | 2013-12-18 | 马肯依玛士公司 | New method for stimulation range detection in continuous ink jet printer |
| CN102304236A (en) * | 2011-07-08 | 2012-01-04 | 唐东波 | Emulsion antioxygen and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 彭正标，等: ""循环流化床制取流体冰种液滴碰撞—聚并实验研究"", 《东南大学学报（自然科学版）》, vol. 37, no. 5, 30 September 2007 (2007-09-30) * |
| 薛社生，等: ""激波对液滴碰撞的影响分析"", 《爆炸与冲击》, 31 December 2013 (2013-12-31) * |
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