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Title: On asymptotical & numerical analyses of liquid jets
Author: Mohsin, Muhammad
ISNI:       0000 0004 2730 3255
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2013
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Liquid jet breakup is a commonly occurring phenomenon in the world and controlling the breakup process is very important and useful in many industrial, engineering and medical fields. In this thesis, we investigate the behaviour of liquid jets and, in particular, how to control the breakup of liquid jets. For that purpose, we examine the behaviour of linear and nonlinear waves travelling along a liquid jet using two different methods, the classical method and then the Needham-Leach method. We perform a linear temporal instability analysis of steady-state solutions and obtain a temporal dispersion relation, which we solve numerically to investigate the behaviour of maximum growth rates and maximum wave numbers of the most unstable wave disturbance. We also obtain the nonlinear temporal equations, which we solve to get useful information about the breakup length, main and satellite drop sizes, by changing key physical parameters of the problem. We obtain useful information about the liquid jet breakup, the region of breakup and, most importantly, the means of controlling the liquid jet breakup. We also obtain an asymptotic solution to the liquid jet equations for large space and time limits.
Supervisor: Not available Sponsor: EPSRC
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QA Mathematics