Hollow droplets impacting onto a solid surface

Drop Impact on a Solid Surface

“…This forms isolated jetting as the impact pressure field is focused around the internal smaller droplets, showing the importance of the number and location of the inner droplets. Counterjets are observed during the impact of hollow drops by Gulyaev & Solonenko (2013).…”

Fine radial jetting during the impact of compound drops

“…However, the axisymmetry of the configuration excludes the focused jetting studied herein. Gulyaev & Solonenko (2013) similarly studied experimentally the bubble-in-drop configuration, showing a counter-jet rising vertically along the centreline. have studied the corresponding heat transfer.…”

Experience in plasma production of hollow ceramic microspheres with required wall thickness

“…The volumetric density of all the fractions of obtained microspheres is shown in the same figure; this density monotonically decreases from 5.3 g/cm 3 for fine spheres down to 1 g/ cm 3 and even to lower values for particles coarser than 100 μm. The volumetric density is an important characteristics of microballoons intimately related to their wall thickness by mass balance [18,20]…”

“…One example of successful applications of microballoons is the plasma spraying of thermal barrier coatings (TBC), in which the hollow structure of zirconia particles enables a reduction of the thermal conductivity of sprayed coatings without an increase in their total porosity [14,15]. The latter effect is due to more complete melting of zirconium dioxide particles in plasma [16], and also due to a unique flow pattern in the spreading hollow droplet [17,18].…”