NDLI: Droplet collision mixing diagnostics using single fluorophore LIF

Content Provider	Springer Nature Link
Author	Carroll, Brian Hidrovo, Carlos
Copyright Year	2012
Abstract	A novel droplet mixing measurement technique is presented that employs single fluorophore laser-induced fluorescence, custom image processing, and statistical analysis for monitoring and quantifying mixing in confined, high-speed droplet collisions. The diagnostic procedure captures time-varying fluorescent signals following binary droplet collisions and reconstructs the spatial concentration field by relating fluorophore intensity to relative concentration. Mixing information is revealed through two governing statistics that separate the roles of convective rearrangement and molecular diffusion during the mixing process. The end result is a viewing window into the rich dynamics of droplet collisions and a diagnostic tool that differentiates between poor and effective mixing. The technique has proved invaluable in the laboratory by allowing direct comparison of different hydrodynamic conditions, such as collision Reynolds and Peclet number, and collision geometries, such as T and Y-junctions. Experiments indicate improved mixing rates and degree of homogenization as the convective timescale for the collision is decreased. Visualization of mixing residuals using pseudo color mapping also identifies areas that are largely segregated from the mixing process, resulting in islands where mixing is poor and stirring has proved ineffective. As the collision velocity is increased, vortical flow fields become apparent and mixing is greatly improved.
Starting Page	1301
Ending Page	1316
Page Count	16
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	53
Issue Number	5
e-ISSN	14321114
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-08-19
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Fluid Dynamics Engineering Thermodynamics, Heat and Mass Transfer Fluid- and Aerodynamics
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A study of droplet impact on static films using the BB-LIF technique

Modelling droplet collision outcomes for different substances and viscosities

Visualization of droplet merging in microchannels using micro-PIV

Deflection of continuous droplet streams using high-voltage dielectrophoresis

Curved laser-sheet for conformal surface flow diagnostics

Unsteady flow diagnostics using weak perturbations

Special issue: laser diagnostics in combustion

Laser diagnostics of an evaporating electrospray

Mixing by internal waves quantified using combined PIV/PLIF technique

Droplet collision mixing diagnostics using single fluorophore LIF

Similar Documents

A study of droplet impact on static films using the BB-LIF technique

Modelling droplet collision outcomes for different substances and viscosities

Visualization of droplet merging in microchannels using micro-PIV

Deflection of continuous droplet streams using high-voltage dielectrophoresis

Curved laser-sheet for conformal surface flow diagnostics

Unsteady flow diagnostics using weak perturbations

Special issue: laser diagnostics in combustion

Laser diagnostics of an evaporating electrospray

Mixing by internal waves quantified using combined PIV/PLIF technique

Droplet collision mixing diagnostics using single fluorophore LIF