|September 13, 2013, 12:58||
spray droplet distortion parameter
Join Date: Feb 2011
Location: Helsinki, Finland
Posts: 156Rep Power: 11
Can somebody explain me why the droplet distortion parameter 'y' is limited to positive values in the TAB oscillation equation?
This is done in the lagrangianSpray (2.2.x)  and dieselSpray (2.0.x)  library.
To my understanding y=0 corresponds to spherical droplet, a positive deformation flattens the droplet perpendicular to the flight directions (y>0) and a negative deformation elongates the droplet (y<0) in flight direction.
I do understand the implications concerning the distorted sphere model due to Liu (1993), i.e. 0<y<1, but this doesn't explain why the distortion parameters y and yDot are set to 0.0 as soon as y is negative.
I would be happy about any comment/explanation on this issue.
Here the links to the source code
Liu, A.B.; Mather, D.; Reitz, R.D., "Effects of Drop Drag and Breakup on Fuel Sprays," SAE Paper 930072, SAE Transactions, Vol. 102, Section 3, Journal of Engines, pp. 63-95, 1993
|dieselspray, distortion, lagrangianspray, spray|
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