Difference between revisions of "Non-Linear Dynamics of a Flow-Focusing Bubble Generator: An Inverted Dripping Faucet"
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This letter deals with the chaotic behaviour of a microfluidic bubble generator (the device reported in [http://soft-matter.seas.harvard.edu/index.php/Formation_of_Monodisperse_Bubbles_in_a_Microfluidic_Flow-Focusing_Device]). Briefly, a gaseous thread is forced through a small orifice while being squeezed by an outer liquid flow; the thread then becomes energetically unstable which results in a bubble being pinched off. Upon varying various parameters of the system such as the gas pressure and liquid flow rate, several bifurcations in the bubble producing behaviour are observed. The deviced is pictured in micrographs in figures 1 and 2. Figure 2 shows different higher-order regimes of bubble production; the figure letter corresponds to the flow rates demarcated in figure 3. | This letter deals with the chaotic behaviour of a microfluidic bubble generator (the device reported in [http://soft-matter.seas.harvard.edu/index.php/Formation_of_Monodisperse_Bubbles_in_a_Microfluidic_Flow-Focusing_Device]). Briefly, a gaseous thread is forced through a small orifice while being squeezed by an outer liquid flow; the thread then becomes energetically unstable which results in a bubble being pinched off. Upon varying various parameters of the system such as the gas pressure and liquid flow rate, several bifurcations in the bubble producing behaviour are observed. The deviced is pictured in micrographs in figures 1 and 2. Figure 2 shows different higher-order regimes of bubble production; the figure letter corresponds to the flow rates demarcated in figure 3. | ||
| − | [[Image:nonlinear1.jpg |left| |thumb| Figure 2: Different bubbling regimes for for various liquid flow rates (<math>Q</math>).]] | + | [[Image:nonlinear1.jpg |left| |400px| |thumb| Figure 2: Different bubbling regimes for for various liquid flow rates (<math>Q</math>).]] |
Revision as of 05:01, 24 February 2009
Physical Review Letters [0031-9007] P. Garstecki, M.J. Fuerstman, G. M. Whitesides (2005) vol:94 iss:23 pg:234502[1]
Brief Summary
This letter deals with the chaotic behaviour of a microfluidic bubble generator (the device reported in [2]). Briefly, a gaseous thread is forced through a small orifice while being squeezed by an outer liquid flow; the thread then becomes energetically unstable which results in a bubble being pinched off. Upon varying various parameters of the system such as the gas pressure and liquid flow rate, several bifurcations in the bubble producing behaviour are observed. The deviced is pictured in micrographs in figures 1 and 2. Figure 2 shows different higher-order regimes of bubble production; the figure letter corresponds to the flow rates demarcated in figure 3.
