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The Wegener–Bergeron–Findeisen process (after Alfred Wegener, Tor Bergeron and Walter Findeisen []), (or "cold-rain process") is a process of ice crystal growth that occurs in mixed phase clouds (containing a mixture of supercooled water and ice) in regions where the ambient vapor pressure falls between the saturation vapor pressure over water and the lower saturation vapor pressure over ice.
Coalescence of ultrasound contrast agent microbubbles is studied to prevent embolies [1] or to block tumour vessels. [2] Microbubble coalescence has been studied with the aid of high-speed photography. [3] In cloud physics the main mechanism of collision is the different terminal velocity between the droplets. The terminal velocity is a ...
Eventually, the droplets become large enough that they fall to the earth as precipitation. The collision-coalescence process does not make up a significant part of cloud formation, as water droplets have a relatively high surface tension. In addition, the occurrence of collision-coalescence is closely related to entrainment-mixing processes. [29]
The turbulence increases the collision frequency between the water drops. The electrodes are insulated to prevent short circuiting, and permit water contents of up to 40% as well as water slugs. The equipment is a separate flow-through electrostatic treatment section installed upstream of a gravity separator to improve the performance.
Coalescence (chemistry), the process by which two or more separate masses of miscible substances seem to "pull" each other together should they make the slightest contact; Coalescence (physics), the merging of two or more droplets, bubbles or particles into one; Coalescer, device which induces coalescence in a medium
Computer generated cut-away view of ALICE showing the 18 detectors of the experiment. ALICE is designed to study high-energy collisions between lead nuclei.These collisions mimic the extreme temperature and energy density that would have been found in the fractions of a second after the Big Bang by forming a quark–gluon plasma, a state of matter in which quarks and gluons are unbound.
A novel form of angiogenesis is the process called ‘’’coalescent angiogenesis’’’, which is the opposite of intussusceptive angiogenesis. [ 4 ] [ 5 ] This mode of angiogenesis was reported from studies of long-term time-lapse microscopy in the vasculature of the chick chorioallantoic membrane (CAM), where this novel non-sprouting ...
Asteroid collision—building planets (artist concept). The ultimate dissipation of protoplanetary disks is triggered by a number of different mechanisms. The inner part of the disk is either accreted by the star or ejected by the bipolar jets , [ 45 ] [ 46 ] whereas the outer part can evaporate under the star's powerful UV radiation during the ...