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Title: Three dimensional drop tracking flow chamber for coalescence studies

Abstract

Here, we have developed a novel flow chamber which imposes a controlled axisymmetric stagnation flow to enable the study of external flow effects on coalescence dynamics. This system allows for the first time the precise positioning of a drop in a three dimensional flow and additionally enforces a highly symmetric flow around the drop. We focus on the study of a single drop approaching a stationary flat plane as this is analogous to two drops approaching each other. A single drop is created and then guided along the unsteady center line of a stagnation flow. The real time computer control algorithm analyzes video images of the drop in two orthogonal planes and manipulates flow restricting valves along the four outlets of the flow. We demonstrate using particle image velocimetry that the computer control not only controls the drop position but also ensures a symmetric flow inside the flow chamber. Finally, this chamber will enable a detailed investigation of the drainage of the thin film between the drop and the lower surface in order to probe the effect of external flow on coalescence.

Authors:
 [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Microscale Science and Technology
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1426974
Report Number(s):
SAND-2007-1088J
Journal ID: ISSN 0034-6748; 498631
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 78; Journal Issue: 9; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 97 MATHEMATICS AND COMPUTING

Citation Formats

Grillet, Anne M., Brooks, Carlton F., Bourdon, Chris J., and Gorby, Allen D. Three dimensional drop tracking flow chamber for coalescence studies. United States: N. p., 2007. Web. doi:10.1063/1.2780160.
Grillet, Anne M., Brooks, Carlton F., Bourdon, Chris J., & Gorby, Allen D. Three dimensional drop tracking flow chamber for coalescence studies. United States. doi:10.1063/1.2780160.
Grillet, Anne M., Brooks, Carlton F., Bourdon, Chris J., and Gorby, Allen D. Wed . "Three dimensional drop tracking flow chamber for coalescence studies". United States. doi:10.1063/1.2780160. https://www.osti.gov/servlets/purl/1426974.
@article{osti_1426974,
title = {Three dimensional drop tracking flow chamber for coalescence studies},
author = {Grillet, Anne M. and Brooks, Carlton F. and Bourdon, Chris J. and Gorby, Allen D.},
abstractNote = {Here, we have developed a novel flow chamber which imposes a controlled axisymmetric stagnation flow to enable the study of external flow effects on coalescence dynamics. This system allows for the first time the precise positioning of a drop in a three dimensional flow and additionally enforces a highly symmetric flow around the drop. We focus on the study of a single drop approaching a stationary flat plane as this is analogous to two drops approaching each other. A single drop is created and then guided along the unsteady center line of a stagnation flow. The real time computer control algorithm analyzes video images of the drop in two orthogonal planes and manipulates flow restricting valves along the four outlets of the flow. We demonstrate using particle image velocimetry that the computer control not only controls the drop position but also ensures a symmetric flow inside the flow chamber. Finally, this chamber will enable a detailed investigation of the drainage of the thin film between the drop and the lower surface in order to probe the effect of external flow on coalescence.},
doi = {10.1063/1.2780160},
journal = {Review of Scientific Instruments},
number = 9,
volume = 78,
place = {United States},
year = {Wed Sep 12 00:00:00 EDT 2007},
month = {Wed Sep 12 00:00:00 EDT 2007}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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