Temporal instability of gas jets injected in viscous liquids to three-dimensional disturbances

1998 ◽  
Vol 10 (8) ◽  
pp. 2105-2107 ◽  
Author(s):  
R. N. Parthasarathy ◽  
Kai-Ming Chiang
Keyword(s):  
Three Dimensional ◽  
Viscous Liquids ◽  
Gas Jets ◽  
Temporal Instability

Three-Dimensional Temporal Instability of Compressible Gas Jets Injected in Liquids

AIAA Journal ◽  
10.2514/2.714 ◽  
1999 ◽  
Vol 37 (2) ◽  
pp. 202-207 ◽  
Author(s):  
Krishnan Subramaniam ◽  
Ramkumar N. Parthasarathy ◽  
Kai-Ming Chiang
Keyword(s):  
Three Dimensional ◽  
Gas Jets ◽  
Temporal Instability ◽  
Compressible Gas

Three-dimensional temporal instability of compressible gas jets injected in liquids

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 202-207
Author(s):  
Krishnan Subramaniam ◽  
Ramkumar N. Parthasarathy ◽  
Kai-Ming Chiang
Keyword(s):  
Three Dimensional ◽  
Gas Jets ◽  
Temporal Instability ◽  
Compressible Gas

Effects of confinement on the temporal instability of gas jets injected in viscous liquids

2000 ◽  
Vol 12 (1) ◽  
pp. 89-91 ◽  
Author(s):  
K. Subramaniam ◽  
R. N. Parthasarathy
Keyword(s):  
Viscous Liquids ◽  
Gas Jets ◽  
Temporal Instability

Interactions Between High-Viscosity Droplets Deposited on a Surface: Experiments and Simulations

2012 ◽  
Author(s):  
J. Esmaeelpanah ◽  
A. Dalili ◽  
S. Chandra ◽  
J. Mostaghimi ◽  
H. C. Fan ◽  
...  
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Piecewise Linear ◽  
Three Dimensional ◽  
Surface Force ◽  
Line Length ◽  
High Viscosity ◽  
Droplet Shape ◽  
Viscous Liquids ◽  
Straight Lines

A combined numerical and experimental investigation of coalescence of droplets of highly viscous liquids dropped on a surface has been carried out. Droplets of 87 wt% glycerin-in-water solutions with viscosity 110 centistokes were deposited sequentially in straight lines onto a flat, solid steel plate and droplet impact photographed. Impacting droplets spread on the surface until liquid surface tension and viscosity overcame inertial forces and the droplets recoiled, eventually reaching equilibrium. Droplet center-to-center distance was varied and droplet line length was measured from photographs. As droplet spacing was increased there was less interaction between the droplets. A three dimensional parallel code has been developed to simulate fluid flow and free surface interaction by solving the continuity, momentum and volume-of-fluid (VOF) equations. The two-step projection method was employed to solve the governing equations for the whole domain including both liquid and air phases. The continuum-surface-force (CSF) scheme was applied to model surface tension and the piecewise-linear-interface-construction (PLIC) technique used to reconstruct the free surface. Computer generated images of impacting droplets modeled droplet shape evolution correctly and compared well with photographs taken during experiments. Accurate predictions were obtained for droplet line length during spreading and at equilibrium.

NMR Studies of Nanoscale Organization and Dynamics in Polymer Electrolytes

2004 ◽  
Vol 57 (12) ◽  
pp. 1185 ◽  
Author(s):  
William S. Price ◽  
Yuichi Aihara ◽  
Kikuko Hayamizu
Keyword(s):  
Molecular Weight ◽  
Spin Echo ◽  
Three Dimensional ◽  
Nmr Relaxation ◽  
Polymer Chains ◽  
Porous Polymer ◽  
Random Copolymers ◽  
Nmr Studies ◽  
Viscous Liquids ◽  
Pgse Nmr

Multinuclear (i.e., 7Li, 19F, and 1H) NMR relaxation and pulsed field gradient spin-echo (PGSE) NMR translational diffusion measurements have been used to study the reorientational and translational dynamics of the polymeric, anionic, and cationic species in a polymer electrolyte system composed of high-molecular-weight comb-branched polyethers and their precursor macromonomers of cross-linked random copolymers, with and without LiN(SO2CF3)2 (LiTFSI) doping. The macromonomers are derivatives of glycerol bonded to ethylene oxide-co-propylene oxide (m(EO-PO)) and are viscous liquids with a molecular weight of approximately 8000. The results were consistent with a picture of the lithium ions undergoing local motions near the polymer chains, whereas the anions diffuse through a slowly fluctuating three-dimensional porous polymer matrix. Four years later, the macromonomer electrolyte samples were re-measured to investigate the effects of long-term aging. The NMR data revealed that the electrolyte has undergone significant structural relaxation. The findings shed light on the evolving molecular architectures that influence conductivity and help to explain the non-ideal conductivity behaviour.

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