collision efficiency
collision efficiency
[kə′lizh·ən i′fish·ən·sē] (meteorology)
The fraction of all water-drops which, initially moving on a collision course with respect to other drops, actually collide (make surface contact) with the other drops.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
Where: K: Boltzmann constant (1.38 x10-23 J/[grados]K); T: temperature ([grados]K); Vf: Filtration velocity (m/s, or m/h) dp: Particle diameter (m) dc: collector diameter (m) [my]: Viscosity of water (NS/m) g: gravity (9.81 m/[s.sup.2]) C: effluent concentration (mg/L); Co: Influent concentration (mg/L); L: Filter length (cm) [epsilon]: porosity of the filter media; [eta]: efficiency of a collector; [alfa]:
collision efficiency, probability of adhesion or adhesion factor [delta]: specific deposit (g/[m.sup.3]); t: Time (h).
Unfortunately, one of the problems with this "ball-in, ballout" method is that bats moments-of-inertia below 7000 ozin (2) tend to have extremely low
collision efficiency (or BESR) so that they often don't rebound with enough speed to pass through the ball speed gates.
The speed of a hit ball in play ([v.sub.h]) depends on the pitch speed ([v.sub.p]), the bat speed ([v.sub.b]) and a term called the
collision efficiency ([e.sub.a]):
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