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Gelled Fuel Simulant Droplet Impact onto a Solid Surface
Author(s) -
Rahimi Shai,
Weihs Daniel
Publication year - 2011
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201000023
Subject(s) - mechanics , newtonian fluid , materials science , non newtonian fluid , drop (telecommunication) , drop impact , kinematics , thermodynamics , composite material , classical mechanics , physics , mechanical engineering , engineering , wetting
The dynamics of the impact process of a non‐Newtonian gelled fuel simulant droplet was studied experimentally. A comparison between the impact process of the gel simulant and that of a neat Newtonian fluid reveals a similar behaviour during the kinematic phase of the droplet impact. However, significant differences, both quantitatively and qualitatively, between the investigated fluids were found during the later spreading, relaxation and equilibrium phases of the impact process. Numerical simulations for the neat Newtonian fluid were found to accurately predict the centreline height during the kinematic phase for both of the fluids. A novel dynamic model for drop shape based on elastic spring and dashpot elements using the Bessel function to describe the periodic term is presented. Very good agreement of the dynamic model with the experimental data was obtained.