scholarly journals From Rock-Buffered to Open Fluid System During Emplacement of the Lower Pedraforca Thrust Sheet (South Pyrenees)

2019 ◽  
pp. 215-217
Author(s):  
David Cruset ◽  
Jaume Vergés ◽  
Irene Cantarero ◽  
Anna Travé
Keyword(s):  
Fluid System ◽  
Thrust Sheet

Structural and metamorphic evolution during tectonic mixing: is the Rocca Canavese Thrust Sheet (Italian Western Alps) a subduction-related mélange?

2018 ◽  
Vol 137 (2) ◽  
pp. 311-329 ◽  
Author(s):  
Manuel Roda ◽  
Francesca De Salvo ◽  
Michele Zucali ◽  
Maria Iole Spalla
Keyword(s):  
Western Alps ◽  
Metamorphic Evolution ◽  
Thrust Sheet

Liquid Crystal Trimers Incorporating Saturated Isosteres of Benzene and Exhibiting Modulated Nematic Phases

2019 ◽  
Author(s):  
Adam Al-Janabi ◽  
Richard Mandle
Keyword(s):  
Liquid Crystal ◽  
Helical Structure ◽  
Molecular Shape ◽  
Saturated Hydrocarbons ◽  
Fluid System ◽  
Structural Requirement ◽  
Disubstituted Benzene ◽  
Bona Fide ◽  
Nematic Phases ◽  
Bend Angles

<p>The nematic twist-bend (N<sub>TB</sub>) liquid crystal phase possesses a local helical structure with a pitch length of a few nanometres and is the first example of spontaneous symmetry breaking in a fluid system. All known examples of the N­<sub>TB­</sub> phase occur in materials whose constituent mesogenic units are aromatic hydrocarbons. It is not clear if this is due to synthetic convenience or a <i>bona fide</i> structural requirement for a material to exhibit this phase of matter. In this work we demonstrate that materials consisting largely of saturated hydrocarbons could also give rise to this mesophase. Furthermore, replacement of 1,4-disubstituted benzene with <i>trans</i> 1,4-cyclohexane or even 1,4-cubane does not especially alter the transition temperatures of the resulting material nor does it appear to impact upon the heliconical tilt angle, suggesting the local structure of the phase is unperturbed. Calculating the probability distribution of bend angles reveals that the choice of isosteric group has little impact on the overall molecular shape, demonstrating the shape-driven nature of the N<sub>TB</sub> phase. </p>

Dependence of viscosity and transition temperatures of a thermal rheological fluid system on the molecular weight of the side-chain crystalline block copolymer dispersant

2020 ◽  
Vol 243 ◽  
pp. 122605 ◽  
Author(s):  
Taiga Hiromori ◽  
Sho Hirai ◽  
Patchiya Phanthong ◽  
Ryoko Nakano ◽  
Hiroshi Sekiguchi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Side Chain ◽  
Transition Temperatures ◽  
Fluid System

scholarly journals A Superfluid Perspective on Neutron Star Dynamics

Universe ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 17
Author(s):  
Nils Andersson
Keyword(s):  
Neutron Star ◽  
Degrees Of Freedom ◽  
Temperature Scale ◽  
Fluid System ◽  
Fluid Core ◽  
State Of Matter ◽  
Entrainment Effect ◽  
Neutron Component ◽  
The Impact

As mature neutron stars are cold (on the relevant temperature scale), one has to carefully consider the state of matter in their interior. The outer kilometre or so is expected to freeze to form an elastic crust of increasingly neutron-rich nuclei, coexisting with a superfluid neutron component, while the star’s fluid core contains a mixed superfluid/superconductor. The dynamics of the star depend heavily on the parameters associated with the different phases. The presence of superfluidity brings new degrees of freedom—in essence we are dealing with a complex multi-fluid system—and additional features: bulk rotation is supported by a dense array of quantised vortices, which introduce dissipation via mutual friction, and the motion of the superfluid is affected by the so-called entrainment effect. This brief survey provides an introduction to—along with a commentary on our current understanding of—these dynamical aspects, paying particular attention to the role of entrainment, and outlines the impact of superfluidity on neutron-star seismology.

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