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High-aspect-ratio micronozzle liquid jet regimes (A) Cylindrical jet, WJ, and flatjet transition images at 0.5 bar and different liquid flow rates. (B) Diameter of jet with respect to flow rates. (C) Depiction of cylindrical jet, WJ, and flatjet flow regime. The theoretical jet diameter is calculated using Equation 7 (see discussion in the main text). The error bars in (B) and (C) correspond to standard measurement error (10%). The garden pink color on the error highlights the variations in the measurements observed between various frames obtained from high-speed video microscopy.
Source publication
Well-defined aerosols pave the way for versatile basic and applied research. Here, we demonstrate a unique whipping instability that generates from a high-aspect-ratio microfluidic device resulting in a unique steady-state gas-focused whipping jet (WJ) without any need for electrification. This WJ device emanates a multi-monodisperse whipping spray...
Contexts in source publication
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... the commonly reported WJ devices, which typically emit a 3D cone pattern, 26,39 our WJ device produces a unique pattern of well-sorted, uniformly distributed, and 2D spray patterns (Figure 1). An additional orthogonal view highlighting the 2D nature of the spray pattern can be found in Figure S3. Our device is based on the principle that any perturbations occurring in capillary co-flowing liquid jets can be decomposed into oscillation modes. ...
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... Reports Physical Science 4, 101221, January 18, 2023obtained during the breakup of the whipping liquid filament, which misses an orthogonal force component due to the WJ device geometry, and this has been demonstrated by imaging the jet in the orthogonal direction ( Figure S3; Videos S1 and S2). ...
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... also observed that the jet diameter at the exit of the nozzle is proportional to the liquid flow rate ( Figure 3B), and we analyzed the data as outlined in Note S3. For a given WJ device of a particular scale fabricated using the dimensions determined in this article (Table 1), this unique WJ pattern is observed only within a range of flow rates ( Figures 3B and 3C). ...
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... also observed that the jet diameter at the exit of the nozzle is proportional to the liquid flow rate ( Figure 3B), and we analyzed the data as outlined in Note S3. For a given WJ device of a particular scale fabricated using the dimensions determined in this article (Table 1), this unique WJ pattern is observed only within a range of flow rates ( Figures 3B and 3C). Thus, each WJ device has its lower and upper critical liquid flow rates, between which the WJ behavior occurs. ...
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... each WJ device has its lower and upper critical liquid flow rates, between which the WJ behavior occurs. Liquid flow rates less than the lower bound of the critical value could result in a cylindrical liquid jet, whereas those above the higher bound of the critical flow rate would result in a flatjet (Fig- ure 3A, bottom), in contrast to those previously reported, which transitioned from cylindrical jet to flatjet directly. 28,48 Furthermore, we also observed that within the critical liquid flow regime where WJs are found, the angle of spread of the WJ varies for different liquid flow rates (Fig- ure 4A). ...
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... the liquid flow rate increases within the WJ flow regime, the diameter of the monodisperse aerodynamic droplets increases and the number of monodisperse streams decrease ( Figures 4A and 4C). And, the spreading angle of the WJ decreases with the increase in momentum of the liquid stream ( Figure S3). ...
