Liquid bubble
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Keyhole fluctuation and pore formation mechanisms during laser powder bed fusion additive manufacturing Open
Keyhole porosity is a key concern in laser powder-bed fusion (LPBF), potentially impacting component fatigue life. However, some keyhole porosity formation mechanisms, e.g., keyhole fluctuation, collapse and bubble growth and shrinkage, re…
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Mechanism of keyhole pore formation in metal additive manufacturing Open
During metal additive manufacturing, the porosity of the as-built part deteriorates the mechanical property and even hinders the further application of metal additive manufacturing. Particularly, the mechanisms of keyhole pores associated …
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Ultrafast synchrotron X-ray imaging studies of microstructure fragmentation in solidification under ultrasound Open
Ultrasound processing of metal alloys is an environmental friendly and promising green technology for liquid metal degassing and microstructural refinement. However many fundamental issues in this field are still not fully understood, beca…
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Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper Open
Helium bubbles are one of the typical radiation microstructures in metals and alloys, significantly influencing their deformation behavior. However, the dynamic evolution of helium bubbles under straining is less explored so far. Here, by …
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Experimental studies on droplet formation in a flow-focusing microchannel in the presence of surfactants Open
The formation of an aqueous droplet in an organic continuous phase was studied experimentally inside a flow-focusing microchannel (190 μm x 195 μm: depth x width) in the presence of surfactants. A low viscosity silicone oil (0.0046 Pa s) w…
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Quantitative Description of Bubble Formation in Response to Electrolyte Engineering Open
The green hydrogen economy is expected to play a crucial role in carbon neutrality, but industrial-scale water electrolysis requires improvements in efficiency, operation costs, and capital costs before broad deployment. Electrolysis opera…
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Early dynamics of cavitation bubbles generated during ns laser ablation of submerged targets Open
In this study, we observe and study the early evolution of cavitation bubbles generated during pulsed laser ablation of titanium targets in different liquid environments utilizing a high-resolution stroboscopic shadowgraphy system. A hydro…
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Nanosecond-Laser Generation of Nanoparticles in Liquids: From Ablation through Bubble Dynamics to Nanoparticle Yield Open
A comprehensive picture of the nanosecond-laser generation of colloidal nanoparticles in liquids is nowadays the demand of their high-throughput industrial fabrication for diverse perspective biomedical, material science, and optoelectroni…
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Insight into the impact of excluding mass transport, heat exchange and chemical reactions heat on the sonochemical bubble yield: Bubble size-dependency Open
Numerical simulations have been performed on a range of ambient bubble radii, in order to reveal the effect of mass transport, heat exchange and chemical reactions heat on the chemical bubble yield of single acoustic bubble. The results of…
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Generation and control of helium-filled soap bubbles for PIV Open
The operating regimes of an orifice-type helium-filled soap bubbles (HFSB) generator are investigated for several combinations of air, helium and soap flow rates to establish the properties of the production process and the resulting trace…
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Growth and Detachment of Oxygen Bubbles Induced by Gold-Catalyzed Decomposition of Hydrogen Peroxide Open
Whereas bubble growth out of gas-oversatured solutions has been quite well understood, including the formation and stability of surface nanobubbles, this is not the case for bubbles forming on catalytic surfaces due to catalytic reactions,…
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Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces Open
For phase-change cooling schemes for electronics, quick activation of nucleate boiling helps safeguard the electronics components from thermal shocks associated with undesired surface superheating at boiling incipience, which is of great i…
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Evolution of bubble size distribution from gas blowout in shallow water Open
Gas is often emanated from the sea bed during a subsea oil and gas blowout. The size of a gas bubble changes due to gas dissolution in the ambient water and expansion as a result of a decrease in water pressure during the rise. It is impor…
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Bubble nucleation from micro-crevices in a shear flow Open
The formation of gas bubbles at gas cavities located in walls bounding the flow occurs in many technical applications, but is usually hard to observe. Even though, the presence of a fluid flow undoubtedly affects the formation of bubbles, …
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Needle Depth and Big-Bubble Success in Deep Anterior Lamellar Keratoplasty Open
BB formation in DALK is more successful if needle insertion and air injection occur at deeper corneal depth. However, ≥90% corneal depth was not necessary in this ex vivo model of DALK. SS-MIOCT can be used to accurately guide the needle i…
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Predicting Homogeneous Bubble Nucleation in Rhyolite Open
Bubble nucleation is the critical first step during magma degassing. The resultant number density of bubbles provides a record of nucleation kinetics and underlying eruptive conditions. The rate of bubble nucleation is strongly dependent o…
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Gas Sparger Orifice Sizes and Solid Particle Characteristics in a Bubble Column – Relative Effect on Hydrodynamics and Mass Transfer Open
The relative effects of the size of gas sparger orifices and properties of solid particles on gas‐liquid mass transfer are not yet fully understood. Here, the impact of sparger orifice sizes, solid particle shapes, and their loading amount…
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Rising bubbles enhance the gelatinous nature of the air–sea interface Open
Bubbles rising through the water column are known to scavenge organic material and microorganisms, and transport them through the air–sea interface after bursting. This mechanism has important implications for air–sea exchange processes. H…
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Influence of wetting conditions on bubble formation from a submerged orifice Open
The formation of gas bubbles by submerged orifices is a fundamental process encountered in various industrial applications. The dynamics of the contact line and the contact angle may have a significant influence on the detached bubble size…
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Helium bubble formation in Pb-16Li within the breeding blanket Open
Helium is a by-product of the tritium formation reaction by neutron bombardment of lithium. The solubility of helium is estimated to be extremely low, which may result into gas pockets formation. These pockets then cause hot spots within t…
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The effects of ultrasound pressure and temperature fields in millisecond bubble nucleation Open
A phenomenological implementation of Classical Nucleation Theory (CNT) is employed to investigate the connection between high intensity focused ultrasound (HIFU) pressure and temperature fields with the energetic requirements of bubble nuc…
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Metastable Nanobubbles Open
Water containing suspended nanobubbles is utilized in various applications. The observed lifetime of suspended nanobubbles is several weeks, whereas, according to the classical theory of bubble stability, a nanosized bubble should dissolve…
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Numerical simulation of bubble formation with a moving contact line using Local Front Reconstruction Method Open
The process of adiabatic bubble formation from an orifice plate occurs in various industrial applications. It is important to understand the dynamics of bubble formation and to develop numerical models to accurately predict the formation d…
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Bubble floatation, burst, drainage, and droplet release characteristics on a free surface: A review Open
The phenomenon of a bubble bursting to generate droplets exists in industrial and environmental systems and has a subtle impact on our daily lives. A bubble generated by gas injection or heating rises to the free surface and undergoes floa…
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Phase-Field Modeling and Simulation of Gas Bubble Coalescence and Detachment in a Gas-Liquid Two-Phase Electrochemical System Open
Many electrochemical processes involve gas evolution and bubble generation on the electrodes. Understanding the behavior of bubbles on the electrode surface and in the electrolyte is crucial to the design and optimization of the electroche…
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Bubble formation in thermal joining of plastics with metals Open
Bubble formation is a widely known phenomenon in thermal joining of thermoplastics to metals. A novel half-section setup was used for high-speed recordings directly in the joining zone to gain time-dependent information on water- and degra…
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Heterogeneous cavitation from atomically smooth liquid–liquid interfaces Open
Pressure reduction in liquids may result in vaporization and bubble formation—a process known as cavitation. It is commonly observed in hydraulic machinery, ship propellers and even in the context of medical therapy within the human body. …
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Defect‐fluorite Gd <sub>2</sub> Zr <sub>2</sub> O <sub>7</sub> ceramics under helium irradiation: Amorphization, cell volume expansion, and multi‐stage bubble formation Open
Here, we report a study on the radiation resistance enhancement of Gd 2 Zr 2 O 7 nanograin ceramics, in which amorphization, cell volume expansion, and multi‐stage helium (He) bubble formation are investigated and discussed. Gd 2 Zr 2 O 7 …
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Formation mechanism of highly aligned nanofibers by a modified bubble electrospinning Open
A modified bubble electrospinning by placing a positively charged ring between the bubble and the parallel electrode collector was presented to fabricate highly aligned nanofibers. The theoretical and experimental analyses were carried out…
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Relationship between bubble generation behavior and hydrogen evolution reaction performance at high current densities during alkaline water electrolysis Open
Alkaline water electrolysis (AWE) has attracted considerable attention in recent years as a means to produce hydrogen. However, one problem associated with AWE is the increase in overpotential at high current densities, which is attributed…