Results 21 to 30 of about 2,346 (192)

A robust method for calculating interface curvature and normal vectors using an extracted local level set [PDF]

open access: yes, 2014
The level-set method is a popular interface tracking method in two-phase flow simulations. An often-cited reason for using it is that the method naturally handles topological changes in the interface, e.g.
Ervik, Åsmund   +2 more
core   +3 more sources

Lamellar thickness and stretching temperature dependency of cavitation in semicrystalline polymers. [PDF]

open access: yesPLoS ONE, 2014
Polybutene-1 (PB-1), a typical semicrystalline polymer, in its stable form I shows a peculiar temperature dependent strain-whitening behavior when being stretched at temperatures in between room temperature and melting temperature of the crystallites ...
Yaotao Wang   +4 more
doaj   +1 more source

Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios

open access: yesFluids, 2020
This work puts forward a modeling study contrasted against experimental, with focus on abrupt circular contraction flow of two highly-elastic constant shear-viscosity Boger fluids, i.e., a polyacrylamide dissolved in corn-syrup PAA/CS (Fluid-1) and a ...
J. Esteban López-Aguilar   +1 more
doaj   +1 more source

Problems of Selection of Lubricants for Ethylene High-Pressure Compressors. 4. Investigation of antifriction properties of naphtene and polyglycol oils during high loading of solid lubricant pair

open access: yesФізика і хімія твердого тіла, 2018
The antifriction properties of naphtene and polyglycol oils during little loading with lubrication of pair bronze-tungsten-carbide-alloy WK-6 (WK-ll) and graphelon-20-WK-6 (WK-11) and high loading with lubrication of pair ball-bearing-high-chromium steel
H. O. Sirenko   +4 more
doaj   +1 more source

Particles adsorbed at various non-aqueous liquid-liquid interfaces [PDF]

open access: yes, 2017
Particles adsorbed at liquid interfaces are commonly used to stabilise water-oil Pickering emulsions and water-air foams. The fundamental understanding of the physics of particles adsorbed at water-air and water-oil interfaces is improving significantly ...
Binks, Bernard P.   +4 more
core   +2 more sources

Development of a Sliding Plate Rheometer to Measure the High Frequency Viscoelastic Properties of Polymer Melts

open access: yesApplied Rheology, 2007
A newly designed and constructed sliding plate rheometer is used to measure the high frequency (210 Hz) linear viscoelastic properties of two model polymers: polybutene (PB) and polydimethylsiloxane (PDMS).
Braybrook Chelsea A.   +3 more
doaj   +1 more source

Novel aspects in the crystallization of polybutene-1 [PDF]

open access: yes, 2022
Semicrystalline polymers cover over two thirds of commercially produced polymeric materials, and have been widely applied to many areas of the modern society, including building and construction, electronics, packaging, etc. Understanding the behavior of
Wang, Wei
core   +1 more source

On the Influence of Concentration on the Rheology of Polymer Solutions: Can Scaling Laws Be Found?

open access: yesApplied Rheology, 2003
The present work is concerned with the study of the rheology of polymer solutions spanning different concentration regimes and originates from a former round-robin research programme on this subject, the S1 project, involving a number of research groups ...
Nogueiro A. J., Maia J. M.
doaj   +1 more source

EPR Spectroscopy Investigation of Cu2+ Ions Adsorbed in Tannin-Formaldehyde Resins of Mimosa (Acacia mearnsii) Bark Extracts

open access: yesJournal of Spectroscopy, 2015
The chemical environment of Cu2+ ions adsorbed in tannin-formaldehyde resins of Acacia mearnsii bark extracts, prepared from polybutene, is investigated by EPR spectroscopy at 300 K. The spectrum is simulated considering two isolated axial Cu(II) species
Marcelo H. Herbst, Ney V. Vugman
doaj   +1 more source

Solid state thermal control polymer coating Patent [PDF]

open access: yes, 1968
Development of solid state polymer coating for obtaining thermal balance in spacecraft ...
Pezdirtz, G. F.
core   +1 more source

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