Breakup Process Research Articles

Impact of gas pressure on particle feature in Fe-based amorphous alloy powders via gas atomization: Simulation and experiment

• The flow dynamics of the gas phase and gas-melt two-phase fields, and the break-up process were illustrated. • The particle size distributions of simulated results were consistent with the powder experimental tests. • The Fe-based alloy powders with diameters in the range of 25–45 μm were found to be a fully amorphous phase. Gas atomization is now an important production technique for Fe-based amorphous alloy powders used in additive manufacturing, particularly selective laser melting, fabricating large-sized Fe-based bulk metallic glasses. Using the realizable k-ε model and discrete phase model theory, the flow dynamics of the gas phase and gas-melt two-phase flow fields in the close-wake condition were investigated to establish the correlation between high gas pressure and powder particle characteristics. The locations of the recirculation zones and the shapes of Mach disks were analyzed in detail for the type of discrete-jet closed-coupled gas atomization nozzle. In the gas-phase flow field, the vortexes, closed to the Mach disk, are found to be a new deceleration method. In the two-phase flow field, the shape of Mach disk changes from “ S ”-shape to “ Z ”-shape under the impact of the droplet flow. As predicted by the wave model, with the elevation of gas pressure, the size of the particle is found to gradually decrease and its distribution becomes more concentrated. Simulation results were compliant with the Fe-based amorphous alloy powder preparation tests. This study deepens the understanding of the gas pressure impacting particle features via gas atomization, and contributes to technological applications.

Effect of Streamwise Perturbation Frequency on Formation Mechanism of Ligament and Droplet in Liquid Circular Jet

In order to study the influence of streamwise forcing on the formation mechanism of liquid ligaments and droplets in the primary breakup process of liquid circular jet, the VOF interface capturing method-based direct numerical simulation was adopted, and a range of sinusoidal velocity disturbances with different frequencies were considered. The selected disturbance frequency range is 0–3000 kHz. This work analyzes the evolution process of the jet surface waves at different disturbance frequencies, and the coupling effect of the jet tip and liquid core on the overall spray field from overall structure, liquid ligament, and droplet formation. The results show that different disturbance frequencies affect the droplet shape distribution and size distribution in spray field. Current work provides guidance for the control of the thermoacoustic instability of the engine and design of the nozzle.

Spray and engine performance of cerium oxide nanopowder and carbon nanotubes modified alternative fuel

This work aims to experimentally investigate and demonstrate the impacts of using Cerium Oxide (CeO2) and multi-wall carbon nanotube (CNT) blended with the alternative fuel, which is gas-to-liquid fuel (GTL) in this study, compared to diesel fuel (DF) on engine performance and study the macroscopic spray characteristics through a Constant Volume Vessel (CVV). Results demonstrate Cerium Oxide nanopowder and carbon nanotubes have very limited impacts on the average cone angle of gas-to-liquid fuel and diesel fuel. Cerium Oxide nanopowder and carbon nanotubes can individually reduce spray penetration during injection under a small ambient pressure when blended with diesel fuel, whilst the effect on gas-to-liquid fuel is less significant because the smaller density and lighter compositions of gas-to-liquid fuel promote its breakup process. In the post-injection period, carbon nanotubes increases the spray penetration of gas-to-liquid fuel, because gas-to-liquid fuel molecules are smaller than diesel fuel. Consequently, more gas-to-liquid fuel molecules stay inside the carbon nanotubes, which can only evaporate through two ends, and thus results in an overall reduced evaporation rate. Moreover, experiments also demonstrate that the average cone angle is independent of rail pressure, but it can be reduced by decreasing ambient pressure and increasing ambient temperature. During injection, both ambient pressure and rail pressure can influence the spray penetration, whilst after the end of injection, only ambient temperature has an effect on it. The engine experiment indicates that Cerium Oxide nanopowder can reduce nitrogen oxides, unburnt hydrocarbons and particulate number emissions simultaneously for both diesel fuel and gas-to-liquid fuel due to its catalysis at high-temperature conditions, whilst carbon nanotubes has a weaker effect on reducing nitrogen oxides and particulate number for gas-to-liquid fuel than diesel fuel.

Precipitation Microphysics during the Extreme Meiyu Period in 2020

Previous studies have reported the large-scale meteorological conditions and dynamic causes of the extreme period of meiyu rainfall in 2020. However, the microphysical properties of meiyu precipitation during this period remain unclear. We used the Global Precipitation Measurement 2ADPR orbital precipitation dataset, the IMERG gridded precipitation dataset and the ERA5 reanalysis dataset to study the characteristics of meiyu precipitation over the Yangtze Plain during the extreme meiyu period in 2020 and historical meiyu periods from 2014 to 2019. The results showed that the average daily rainfall during the 2020 meiyu period was 1.5 times higher than the historical average as a result of the super-strong water vapor flux in the low- to mid-level layers of the atmosphere. The amplitude of nocturnal low-level water vapor transport during the 2020 meiyu period was twice the historical average and, therefore, the diurnal peak of meiyu rainfall at 0630 LST in 2020 was significantly earlier than the historical average. The moisture transport was the dominant moisture supply for precipitation during the 2020 meiyu period, whereas the moisture convection contributed less than in the meiyu periods of 2014–2019. This led to the precipitation in the 2020 meiyu period having a higher concentration of smaller droplets than the historical average. There were lower proportions of size-sorting evaporation and break-up processes in the liquid-phase precipitation processes in the 2020 meiyu than the historical average, but a higher proportion of coalescence processes. These results provide a factual basis for the simulation and forecast of precipitation during extreme meiyu periods.

Effects of chemical inhibitors on the scaling behaviors of calcite and the associated surface interaction mechanisms

HypothesisIt is hypothesized that the performance of a chemical inhibitor to interfere with the precipitation and scaling of calcite (calcium carbonate, CaCO3) is achieved through its chelating interaction with calcium ions. The effectiveness of a chemical inhibitor in removing existing scales from the mineral surfaces is proposed to rely on its ability to modify the calcite crystal structures. ExperimentsBulk scaling tests and dynamic adsorption experiments using a quartz crystal microbalance with dissipation monitoring were conducted to systematically investigate the scaling behaviours (i.e., buildup and breakup processes) of calcite crystals, in the absence and presence of chemical inhibitors, that include polyacrylic acid, sodium hexametaphosphate, 2-phosphonobutane-1,2,4-tricarboxylic acid, and diethylenetriamine penta(methylene phosphonic acid). Scanning electron microscope imaging and thermodynamic characterization using isothermal titration calorimetry were further applied to reveal the surface interactions that contributed to the differences among the effects of the four additives. FindingsThe results indicate that sodium hexametaphosphate is most efficient in alleviating the amount of CaCO3 deposited by reducing the concentration of free Ca2+, and diethylenetriamine penta(methylene phosphonic acid) shows an outstanding ability to clean the mineral surface by destroying the ordered crystal layers of the scales so that they can be washed away with water. This work provides useful insights into the fundamental interactions of chemical inhibitors and calcite, with implications for the development of effective chemical solutions for anti-scaling and descaling applications.

Inclusive α production for the Li6+V51 system

Measurement of angular distributions and energy spectra of $\alpha$ and deuterons through breakup, transfer and incomplete fusion processes to dis-entangle their relative contributions and to investigate relative importance of breakup-fusion compared to transfer. Inclusive $\alpha$ production cross-sections have been measured for $^6$Li + $^{51}$V system near Coulomb barrier energies. Theoretical calculations for estimation of various reaction channels contributing to $\alpha$ production have been performed with finite range coupled reaction method using \textsc{FRESCO} code. The cross-sections from non-capture breakup (NCBU) ($\alpha$ + \textit{d}) and 1\textit{n}, 1\textit{p}, and 1\textit{d} transfer channels, compound nuclear decay channel and incomplete fusion (ICF) leading to $\alpha$ production were estimated to get the cumulative production cross-sections. Contributions from breakup, transfer and incomplete fusion channels could reproduce the integral direct $\alpha$ production cross-sections and their angular distributions quite well. The direct $\alpha$ production cross-sections are in agreement with other targets. The $\alpha$ production cross-sections are higher compared to the deuteron production. Kinematic analysis of the energy spectra of $\alpha$ particles and deuterons suggest that $\alpha$ particle spectra is dominated by breakp-fusion and deuteron spectra have contribution of breakup and transfer reactions. A systematic study of direct $\alpha$ production with various targets follow a universal behavior on average but noticeable differences are observed for different targets. A ratio of $\alpha$ and deuteron yields for a wide mass range of targets shows a saturation above barrier and an increasing production of $\alpha$ particles relative to deuteron around Coulomb barrier.

Primary break-up characterisation and droplet statistics of multi-hole sprays using a probabilistic surface density methodology

The work provides novel physical insight into the complex near-field flow dynamics and the primary break-up characteristics of sprays injected through multi-hole injectors (gasoline ECN Spray G). We use a stochastic fields transported-PDF method ( Σ-Y-PDF ) that allows for more accurate modelling of the sub-grid dynamics. Within this framework, the joint sub-grid probability density function of the liquid volume and surface density is solved using stochastic methods. Initially, the predicted spray dynamics resulting from the primary atomisation are simulated in terms of droplet size, velocity and spray angle. The spray from each hole is then investigated individually. The distribution of liquid near the nozzles agrees very well to the available experimental measurements. It is found that the spray break-up process in these gasoline sprays produces a quasi-log-normal droplet distribution. Such normalised distributions can be used to feed Eulerian–Lagrangian approach, showing a great potential to represent the full spray combustion process coupling the two approaches. Moreover, comparing the statistical and radial distributions of the droplets, we observe that the core of the plumes are characterised by larger droplets (≥10μm), although the overall spray is represented by lower size droplets surrounding the plume centre (≤10μm). Finally, the paper shows that the geometry asymmetry has a considerable effect on the flow field, which in turn affects the droplet behaviour. Even if the average droplet size was not affected by the asymmetry, the droplet velocity presented significant variation ( ≈50% ) for some of the holes.

Probing the Gluonic Structure of the Deuteron with J/ψ Photoproduction in d+Au Ultraperipheral Collisions.

Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson production measured in ultraperipheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing the gluon density. In this Letter, we report the first measurement of J/ψ photoproduction off the deuteron in UPCs at the center-of-mass energy sqrt[s_{NN}]=200 GeV in d+Au collisions. The differential cross section as a function of momentum transfer -t is measured. In addition, data with a neutron tagged in the deuteron-going zero-degree calorimeter is investigated for the first time, which is found to be consistent with the expectation of incoherent diffractive scattering at low momentum transfer. Theoretical predictions based on the color glass condensate saturation model and the leading twist approximation nuclear shadowing model are compared with the data quantitatively. A better agreement with the saturation model has been observed. With the current measurement, the results are found to be directly sensitive to the gluon density distribution of the deuteron and the deuteron breakup process, which provides insights into the nuclear gluonic structure.

The Volcanic Outer High of Campos Rifted Margin in Southeast Brazil: The structure and formation of SEMA

The SEMA (South East Magnetic Anomaly) is a high amplitude magnetic lineament in the most distal part of the Campos Rifted Margin in Southeast Brazil. It runs continuously from south to north along 85 km reaching 500 nT in deep waters. The aim of this paper is to investigate the structure, stratigraphy and nature of the SEMA, and to discuss its significance for the evolution of the margin. Based on seismic, magnetic and gravity analysis, we interpret the SEMA as a volcanic outer high. Its formation was prior to the salt migration oceanwards, probably earlier to the breakup, constraining a time-relative formation in the Late Aptian - Early Albian. It is bounded by a basinward dipping, large-scale fault that created a huge depocenter continentwards. The Volcanic Outer High of the SEMA marks the transition to a distinct tectonostratigraphic compartment and salt domain, characterized by intense halokinesis, significant thinning and modification of the pre-salt sequences, and increasing presence of volcanic and intrusive rocks. It forms a long volcanic ridge in the external boundary of the Campos Rifted Margin, which may have influenced the paleo-circulation. Moreover, its understanding could provide new insights into the breakup process.

Proterozoic basin–orogen framework in the northern Tarim Craton, China

The Tabei Uplift is the oldest unit in the Tarim Basin, but its initiation and evolution are unclear, which restricts our understanding of the Neoproterozoic basin–orogen framework of the northern Tarim Craton, and the breakup process at the margin of the Rodinia supercontinent. In this study, we analyzed U–Pb age spectra of detrital zircons from sedimentary rocks of the Tabei Uplift and surrounding regions. By integrating these data of outcrops, wells, and seismic investigation, we identify spatial–temporal changes in Neoproterozoic sedimentary provenances, establish a geological framework of basin–orogen structure, and elucidate the long-term evolution of the Tabei Uplift.Five sedimentary rock samples were dated by zircon U–Pb geochronology to constrain their depositional ages and regional stratigraphic correlations. Precambrian strata of Well YL1 in the Yuli region belong to the upper Cryogenian–lower Ediacaran (ca. 660 Ma); Precambrian strata of the Sawapuqi region belong to the Ediacaran (ca. 595 Ma); and strata of the Wikiritag region belong to the middle Paleozoic (ca. 410 Ma).Analysis of 3962 zircons from these 5 new samples and 54 published Neoproterozoic samples reveals temporal and spatial variations in their U–Pb age spectra. From the periphery of the northern Tarim Craton to the Tabei Uplift for a given period (such as the Tonian Aksu Group, Cryogenian, and Ediacaran), the proportion of Neoproterozoic zircons decreases, whereas the proportion of Neoarchean–Paleoproterozoic zircons increases. From the Tonian to the Ediacaran for a given location, the proportion of Neoproterozoic zircons decreases, whereas the proportion of Neoarchean–Paleoproterozoic zircons increases. Combining this information with a Neoproterozoic wedge structure in the northern Tarim Craton observed in three geological/seismic profiles, the North Tarim Orogen and adjacent rift basin are inferred to have formed simultaneously during the Neoproterozoic. The Proterozoic North Tarim Orogen served as the provenance for surrounding regions in the northern Tarim Craton. We propose two main phases of Proterozoic orogenesis in the northern Tarim Craton, during the Paleoproterozoic and Neoproterozoic. The Paleoproterozoic orogen was initiated at ca. 1.9–1.8 Ga and terminated at ca. 1.8 Ga, whereas the Neoproterozoic orogen was initiated at ca. 900–740 Ma and terminated at ca. 600 Ma. The temporal–spatial evolution of the Neoproterozoic basin–orogen framework in the northern Tarim Craton was closely related to the breakup process at the margin of the Rodinia supercontinent.

Droplet evaporation of water and fuel jets in low and high temperature subsonic crossflows

Water and Jet A fuel were injected into low and high temperature crossflows of 65 °C and 425 °C, respectively, at a fixed crossflow pressure of 100 kPa, a liquid jet to gaseous crossflow momentum flux ratio of 7.5, and a crossflow Mach number of 0.175. Liquid jet injection temperature was also varied between 20 °C and 90 °C. The orifice had a diameter of 1 mm and a length of 20 mm. Visualization of the spray primary breakup processes was achieved using high-speed imaging. Droplet characteristics were measured at cross-sectional planes 300 mm, 400 mm, and 500 mm downstream of the orifice using a 2-component phase Doppler particle anemometry system. Results discussed included the variation of liquid volume flux, droplet size, and droplet velocities with increasing distance downstream of the injector. Analysis of the results revealed distinct changes in local and global droplet characteristics for both test liquids when injected into the high temperature crossflow compared to the low temperature crossflow. These changes, including increases in measured droplet size, were more significant at the bottom of the spray plume, especially for Jet A, due to the preferential heat-up and evaporation of droplets based on size and liquid thermal properties. For Jet A droplets smaller than 5 μm evaporated completely, leaving behind larger droplets that resisted evaporation. Increasing jet injection temperature was observed to reduce droplet size at a fixed crossflow velocity by reducing liquid surface tension which enhanced atomization. Higher liquid jet injection temperatures also resulted in increased droplet evaporation that initiated closer to the orifice exit.

Analytical and Numerical Investigation of Non-Newtonian Droplet Breakup in Asymmetric T-junction

In this paper, an analytical investigation and 3D numerical simulation are presented for the breakup of floating non-Newtonian droplets in a non-Newtonian fluid. The considered geometry is a T-junction with unequal-width branches that can generate droplets with un-equal size. There is a very good agreement between the analytical solution and numerical simulation results obtained in this research. Various quantities such as branches flow rate ratio, branches velocity ratio, droplet’s length in each branch, the whole length of the droplet, vorticity and pressure have been investigated during the breakup process in this study. The results showed that the branches flow rate ratio and the branches velocity ratio were constant during the breakup process. It was also observed that the length of the droplet in each of the branches and the whole length of the droplet increased linearly during the breakup process. Also, the vorticity has its maximum at the breakup moment. ‎‎

Characteristics of Melting Layer in Cyclones Over the Western North Pacific Detected by the GPM Dual‐Frequency Precipitation Radar

AbstractA knowledge of melting layer (ML) is crucial for the accurate estimation of rainfall and the study of microphysical characterization of the cloud. Based on 5 years (2016–2020) of measurements of cyclones over the Western North Pacific from the dual‐frequency precipitation radar on board the Global Precipitation Measurement satellite, the characteristics and microphysical processes of ML are investigated. Our research shows that the height of the top boundary of ML is higher than the freezing level (0 degrees centigrade level, FL), and the Ze of freezing level is larger than that of the top of ML. The height of ML is the result of the combined effect of latitude and stage of cyclone. When the ice particles pass through the ML, the mass‐weighted mean diameter (Dm), the generalized intercept parameter (Nw), and the distributions of the reflectivity factor (Ze) increase, indicating that growth mechanism and breakup process.

Splitting of droplet with different sizes inside a symmetric T-junction microchannel using an electric field

In the current study, droplets dynamics under an asymmetric electric field in a T-junction are numerically studied using COMSOL Multi-physics software. The effect of different factors such as dimensionless length of mother droplet (L*), Capillary number (Ca), and electric capillary number (Cae) are investigated on the breakup process in symmetric T-junctions. Two novel patterns of droplets, namely, hybrid asymmetric splitting mode and sorting patterns, have been observed by imposing an electric field in one branch of the microchannel. It is also concluded that using an electric field is a promising strategy to reach droplets with arbitrary sizes and control over the splitting ratio of daughter droplets precisely in a T- junction by adjusting the electric field strength. After a certain electric capillary number (left. {Ca_{e} } right|_{Sorting}), the mother droplet does not breakup and is sorted on the side of the branch that the electric field imposes. Furthermore, left. {Ca_{e} } right|_{Sorting} increases with the increment of L* and Ca.

Experimental evidence for α production following neutron transfer in the C13 + Nb93 system

Spectra of $\ensuremath{\alpha}$ particles were measured for $^{12,13}\mathrm{C} + ^{93}\mathrm{Nb}$ systems at several angles for a bombarding energy of 65 MeV to investigate various reaction mechanisms like direct break up and cluster transfer responsible for $\ensuremath{\alpha}$ production. The $\ensuremath{\alpha}$ spectra were analyzed in detail to determine the effect of $1n$ transfer on an $\ensuremath{\alpha}$-production cross section in particular. After accounting for contributions from direct breakup and Be transfer, there is a clear signature of the $\ensuremath{\alpha}$ particles produced through the break-up process following neutron transfer in the case of a $^{13}\mathrm{C}$ induced reaction. This is an interesting result being reported for the strongly bound projectile.

Breaking-up should not be hard to do! Designing contracts to avoid wars of attrition

The partnership dissolution literature has almost entirely focused on the properties of exit mechanisms in isolation taking other features of the break-up process as given. We consider a simple, two-stage model of the dissolution process where both the decision to dissolve and the roles the partners play in the exit mechanism are endogenously determined according to a “triggering rule.” We find certain pairings of triggering rules and exit mechanisms can lead to a war of attrition which inefficiently prolongs the dissolution process. However, since these theoretical predictions require sophisticated reasoning and backward induction, it is unclear whether the theory has any empirical validity. We therefore conduct a laboratory experiment to explore this question. Treatments are selected to test the main predictions of the model using combinations of exit mechanisms and triggering rules commonly seen in practice. The experimental results are largely supportive of the underlying theoretical predictions.

Role of water micro-explosion on fuel droplet size distribution, engine performance, and emissions in a water-diesel emulsified engine: A comprehensive numerical investigation

The global warming crisis and strict regulations have pushed the automotive industry into technological change, but it will take time, so finding quick solutions can be very helpful. Using water in diesel emulsion is one of the low-cost and fast solutions to reduce pollution and improve the performance of diesel engines. In this study, the effects of adding water to diesel fuel and the phenomena that occur when water enters the combustion chamber are investigated. For this purpose, a simulation of a four-cylinder diesel engine has been used with different content of water in diesel (0% or pure diesel, 5%, 10%, 15%, and 20%). The simulations are performed in Converge CFD using dynamic mesh and adaptive mesh refinement. The results showed that the use of water in diesel leads to an improvement of about 10% in engine indicated power and a simultaneous reduction in soot and NOx by 10 and 30%, respectively. The simulation results showed that water droplet micro-explosions accelerated the fuel droplet breakup process and reduced the combustion duration by 10%–30%.

Numerical Study on the Effect of Jet Cross Section Shape on the Corium Jet Breakup Behavior With Lattice Boltzmann Method

In a core meltdown accident in light water reactors, molten corium may drop into the lower plenum of the pressure vessel and interact with water, which is called fuel–coolant interaction (FCI). The behavior of the corium jet breakup in water during FCIs is important for the in-vessel retention strategy and has been extensively studied. While in previous studies, the jet cross-section shapes are naturally assumed to be circular, which is actually not always the case, in this study, the breakup processes of the corium jets with four different elliptical cross-section shapes and three different penetration velocities are simulated with color-gradient lattice Boltzmann method. The effect of the cross-section shape on the hydrodynamic breakup behavior of the corium jet is analyzed in detail. It is found that the effect of the cross-section shape on the jet penetration depth is very limited. With the increase in the aspect ratio under the same penetration velocity, the jet breakup length decreases gradually. In general, the dimensionless corium surface area increases with the increase in the aspect ratio for the jets under the same penetration velocity.

Coulomb-nuclear dynamics in the breakup of the weakly bound Li8 nucleus

A detailed study of total, Coulomb, and nuclear breakup cross sections dependence on the projectile ground-state binding energy ${\ensuremath{\varepsilon}}_{b}$ is presented by considering the $^{8}\mathrm{Li}+^{12}\mathrm{C}$ and $^{8}\mathrm{Li}+^{208}\mathrm{Pb}$ breakup reactions. To this end, apart from the experimental one-neutron separation energy of $^{8}\mathrm{Li}$ nucleus $({\ensuremath{\varepsilon}}_{b}=2.03\phantom{\rule{0.16em}{0ex}}\mathrm{MeV})$, lower values of ${\ensuremath{\varepsilon}}_{b}$ down to ${\ensuremath{\varepsilon}}_{b}=0.01\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$, are also being considered. It is shown that all breakup processes become peripheral as ${\ensuremath{\varepsilon}}_{b}\ensuremath{\rightarrow}0.01\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$, which is understood as due to the well-known large spacial extension of ground-state wave functions associated to weakly bound projectiles. The Coulomb breakup cross section is found to be more strongly dependent on ${\ensuremath{\varepsilon}}_{b}$ than the nuclear breakup cross section, such that the Coulomb breakup becomes more significant as ${\ensuremath{\varepsilon}}_{b}$ decreases, even in a naturally nuclear-dominated reaction. This is mainly due to the long-range nature of the Coulomb forces, leading to a direct dependence of the Coulomb breakup on the electromagnetic transition matrix. It is also highlighted the fact that the nuclear absorption plays a minor role for small binding when the breakup becomes more peripheral.

Kinematics of the viscous filament during the droplet breakup in air

The dripping regime in the vicinity of the fluid droplet breakup is analyzed using the correlation between experiments and numerics. The evolutions of filament’s neck and its corresponding thinning velocity are described using the logistic functions. Three flow regions are observed as the relative time decreases: (1) a monotonous increase of the neck’s thinning velocity, where inertia and capillarity are balanced, (2) a transition domain characterized by the equilibrium between inertia, capillarity, and viscous forces, where the thinning velocity varies non-monotonically with the relative time and (3) the final droplet pinch-off, where velocity decreases or oscillates around a constant value. The distributions of the upzeta-coefficient (parameter related to the non-dimensional second invariant of the velocity gradient) on the filament’s surface and droplet’s profile characterize the kinematics at the interface. The regions dominated by extension, where pure elongation is located at upzeta cong 1, are determined. One main result of this study is the confirmation that distribution of the upzeta-coefficient is a relevant parameter to analyze and to quantify the breakup process. This result has the potential of developing novel techniques and more precise procedures in determining the interfacial rheology of viscous and complex fluids.