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SUMMARY:Droplet Impingement Modelling - Dr Ilai Sher\, Visitor\, CUED
DTSTART:20080502T110000Z
DTEND:20080502T120000Z
UID:TALK12087@talks.cam.ac.uk
CONTACT:Simon Illingworth
DESCRIPTION:Spray impingement is a prevalent phenomenon in numerous applic
 ations. In turbine combustion chambers and internal combustion engines\, s
 pray impingement is a consequence of fuel injection. The impinging spray c
 an result in secondary spray and/or film formation. Characteristics of spr
 ay play a major role in combustion performance\, hence the importance of u
 nderstanding the impingement mechanism in this context.\nA single droplet 
 impinging on a wall is the key phenomenon underlying the whole spray impin
 gement mechanism. A droplet hitting the wall can bounce\, smear\, break\, 
 splash or any combination of these. The fate of such a droplet is a functi
 on of various parameters: initial size and velocity\, droplet physical pro
 perties such as surface tension and viscosity\, and wall surface condition
 s such as wettability\, roughness\, and temperature. \nIn this talk\, a si
 mple analytical model for an impinging droplet will be presented. The mode
 l predicts some of the key features of impingement\, such as “crowning
 ” and splashing. The effect of the different physical parameters and wal
 l conditions on these phenomena will be discussed.\n
LOCATION:Language Unit Meeting Room
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