國立虎尾科技大學 |

Studies of levitated single droplets.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Studies of levitated single droplets./
Author:	Chan, Chak Keung.
Description:	1 online resource (144 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 52-10, Section: B, page: 5395.
Subject:	Chemical engineering. -
Online resource:	click for full text (PQDT)

Studies of levitated single droplets.
Chan, Chak Keung.

Studies of levitated single droplets. - 1 online resource (144 pages)

Source: Dissertation Abstracts International, Volume: 52-10, Section: B, page: 5395.

Thesis (Ph.D.)--California Institute of Technology, 1992.

Includes bibliographical references

The electrodynamic balance is a very unique and versatile device to study single particles. In-situ measurements of particles in a well characterized and controlled environment are possible. Supersaturated solutions can also be studied. In this research, its applications in studying light scattering, water activities and evaporation kinetics of single droplets are demonstrated. In particular, we studied the elastic and Raman scattering of an evaporating NaNO$\sb3$ droplet. Different types of size dependent optical resonance structures were identified. The strongest Raman signal received was due to internal resonance of the excitation beam, giving similar enhancements to all Raman emissions. The intensity ratio of Raman nitrate to Raman water peaks can be used as a probe to semi-quantitatively characterize the droplet compositions.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

Subjects--Topical Terms:

555952
Chemical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Studies of levitated single droplets.
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035 $a AAI9209451
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100 1 $a Chan, Chak Keung. $3 1188533
245 1 0 $a Studies of levitated single droplets.
264 0 $c 1992
300 $a 1 online resource (144 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 52-10, Section: B, page: 5395.
500 $a Co-Advisers: John H. Seinfeld; Richard C. Flagan.
502 $a Thesis (Ph.D.)--California Institute of Technology, 1992.
504 $a Includes bibliographical references
520 $a The electrodynamic balance is a very unique and versatile device to study single particles. In-situ measurements of particles in a well characterized and controlled environment are possible. Supersaturated solutions can also be studied. In this research, its applications in studying light scattering, water activities and evaporation kinetics of single droplets are demonstrated. In particular, we studied the elastic and Raman scattering of an evaporating NaNO$\sb3$ droplet. Different types of size dependent optical resonance structures were identified. The strongest Raman signal received was due to internal resonance of the excitation beam, giving similar enhancements to all Raman emissions. The intensity ratio of Raman nitrate to Raman water peaks can be used as a probe to semi-quantitatively characterize the droplet compositions.
520 $a Water activities of mixed NH$\sb4$NO$\sb3$/(NH$\sb4)\sb2$SO$\sb4$ aqueous solutions were also studied using the Spherical Void Electrodynamic Levitator. The compositional water activity data were used to evaluate the performance of three commonly used mixed electrolyte models: the Zdanovskii-Strokes-Robinson model, the Kusik and Meissner model, and the Pitzer model. They all predict droplet concentrations in mass fractions to a few percents error within the range where water activity data of single electrolytes are available. Evaporation of a few ceramic precursor solution droplets were investigated. While some precursor solutions crystallized, some others formed gels. Gel formation hindered further evaporation of water and the droplets exhibited a sharp decrease in evaporation rates. An approach to study rapid evaporation of droplets in the time scales of a few seconds was also demonstrated.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Chemical engineering. $3 555952
655 7 $a Electronic books. $2 local $3 554714
690 $a 0542
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a California Institute of Technology. $3 1188534
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9209451 $z click for full text (PQDT)