Transport Properties
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2021 ◽  
Vol 127 (8) ◽  
Author(s):  
I. Ouni ◽  
H. Ben Khlifa ◽  
R. M’nassri ◽  
Muaffaq. M. Nofal ◽  
Elham M. A. Dannoun ◽  
...  

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 875
Author(s):  
Joshua A. H. Littleton ◽  
Richard A. Secco ◽  
Wenjun Yong

The core of Ganymede is suggested to be mainly Fe but with a significant proportion of S. Effects of S as a core constituent are freezing-point depression, allowing for a molten core at relatively low core temperatures, and modification of transport properties that can influence the dynamo and thermal evolution. The electrical resistivity of solid and liquid Fe-FeS (~24–30 wt.% S) was measured up to 5 GPa and thermal conductivity was calculated using the Wiedemann–Franz law. These first well-constrained experimental data on near eutectic Fe-FeS compositions showed intermediate values of electrical and thermal conductivities compared to the end-members. Eutectic temperatures were delineated from the solid to liquid transition, inferred from sharp changes in electrical resistivity, at each pressure. Combined with thermal models, our calculated estimates of the adiabatic heat flow of a molten Fe-FeS eutectic composition core model of Ganymede showed that thermal convection is permissible.


2021 ◽  
Author(s):  
Chance A. Norris ◽  
Mukul Parmananda ◽  
Scott Alan Roberts ◽  
Partha P. Mukherjee

Graphite electrodes in the lithium-ion battery exhibit various particle shapes, including spherical and platelet morphologies, which influence structural and electrochemical characteristics. It is well established that porous structures exhibit spatial heterogeneity, and particle morphology can influence transport properties. The impact of particle morphology on the heterogeneity and anisotropy of geometric and transport properties has not been previously studied. This study characterizes the spatial heterogeneities of eighteen graphite electrodes at multiple length scales by calculating and comparing structural anisotropy, geometric quantities, and transport properties (pore-scale tortuosity and electrical conductivity). We found that particle morphology and structural anisotropy play an integral role in determining the spatial heterogeneity of directional tortuosity and its dependency on pore-scale heterogeneity. Our analysis reveals that the magnitude of in-plane and through-plane tortuosity difference influences the multiscale heterogeneity in graphite electrodes.


Author(s):  
Zhaojian Sun ◽  
Bowen Zhang ◽  
Yunke Zhao ◽  
Muhammad Khurram ◽  
Qingfeng Yan

Author(s):  
Marshall J. Allen ◽  
Rahul Sujanani ◽  
Alyssa Chamseddine ◽  
Benny D. Freeman ◽  
Zachariah A. Page

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
C. S. Zhu ◽  
B. Lei ◽  
Z. L. Sun ◽  
J. H. Cui ◽  
M. Z. Shi ◽  
...  

2021 ◽  
Vol 184 (2) ◽  
Author(s):  
Jory Griffin ◽  
Jens Marklof

AbstractWe study the macroscopic transport properties of the quantum Lorentz gas in a crystal with short-range potentials, and show that in the Boltzmann–Grad limit the quantum dynamics converges to a random flight process which is not compatible with the linear Boltzmann equation. Our derivation relies on a hypothesis concerning the statistical distribution of lattice points in thin domains, which is closely related to the Berry–Tabor conjecture in quantum chaos.


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