Results 71 to 80 of about 4,725 (242)

Developing a new approaching technique of homotopy perturbation method to solve two-group reflected cylindrical reactor

Results in Physics, 2019
The solution of neutron diffusion equation is important to describe the behavior of the neutrons in the nuclear reactors. The essential cylindrical reactor geometry will be studied in this work, where the reactor reflector part is added to the core part ...
Mohammed Shqair
doaj   +1 more source

Sulfide‐Based Electrolytes for All‐Solid‐State Sodium Batteries

Advanced Energy Materials, EarlyView.
This review covers the structural features and synthesis strategies of sulfide‐based solid electrolytes, as well as critical challenges related to conductivity, interfacial and moisture stability, and scaling‐up for practical application in Sodium‐based All Solid‐State Batteries.
Han Yang, Luca Weckelmann, Baolin Wu, Chih‐Long Tsai, Luc Raijmakers, Rüdiger‐A. Eichel, Anna Windmüller   +6 more
wiley   +1 more source

Numerical analysis of the self-sustaining traveling wave of nuclear fission propagated by epithermal neutrons in uranium dicarbide medium [PDF]

Ядерна фізика та енергетика
This study investigates the self-sustaining traveling wave of nuclear fission in a uranium dicarbide medium by numerically solving a system of partial differential equations.
M. R. Shcherbyna, K. O. Shcherbyna, V. O. Tarasov, S. I. Kosenko, S. A. Chernezhenko   +4 more
doaj   +1 more source

Disorder‐Driven Fast Na+ Transport: From Crystalline to Amorphous Networks in the Mixed‐Anion NaTaOxCl6−2x Oxychlorides

Advanced Energy Materials, EarlyView.
Oxygen substitution in NaTaOxCl6‐2x drives structural evolution from isolated [TaCl6]– octahedra, through oxygen‐bridged [Ta2OCl10]2– dimers, toward extended trans‐[TaO2Cl4]3– chain‐like arrangements. At intermediate compositions, zero‐dimensional corner‐sharing motifs are proposed to create a flexible, disordered framework that peaks ionic ...
Justin Leifeld, Abigail C. Parsons, Alexandra Morscher, Xabier Martinez de Irujo‐Labalde, Marvin A. Kraft, Oskar G. Soulas, Bibek Samanta, Wiebke Zielasko, Neelam Yadav, Kyra Strotmann, Niina Jalarvo, Bruno V. M. Rodrigues, Adam Slabon, Philipp Adelhelm, Michael Ryan Hansen, David O. Scanlon, Wolfgang G. Zeier, Alexander G. Squires   +17 more
wiley   +1 more source

Accelerated solution methods for self-adjoint angular flux neutron transport equations based on scattering matrix decoupling

Nuclear Engineering and Technology
Advanced microreactors exhibit compact geometries, elevated neutron leakage, and pronounced anisotropic scattering. These characteristics necessitate high-fidelity neutron transport methods to accurately resolve core flux distributions.
Duoyu Jiang, Peng Xu, Xinbiao Jiang, Tianliang Hu, Lipeng Wang, Lu Cao, Huaqi Li, Da Li, Lixin Chen   +8 more
doaj   +1 more source

High accurate three-dimensional neutron noise simulator based on GFEM with unstructured hexahedral elements

Nuclear Engineering and Technology, 2019
The purpose of the present study is to develop the 3D static and noise simulator based on Galerkin Finite Element Method (GFEM) using the unstructured hexahedral elements.
Seyed Abolfazl Hosseini
doaj   +1 more source

Mechanisms of Alkali Ionic Transport in Amorphous Oxyhalides Solid State Conductors

Advanced Energy Materials, EarlyView.
Large‐scale machine learning‐based molecular dynamics simulations are used to investigate isovalent amorphous oxyhalides, revealing a remarkable chemically independent ionic conductivity. A rigorous analysis of alkali residence times across different metal–anion environments identifies divalent anions as key diffusion bottlenecks.
Luca Binci, KyuJung Jun, Bowen Deng, Gerbrand Ceder   +3 more
wiley   +1 more source

Solution of different geometries reflected reactors neutron diffusion equation using the homotopy perturbation method

Results in Physics, 2019
The Homotopy Perturbation Method (HPM) proves continuous efficiency for a long time in solving linear and nonlinear mathematical differential equations and their applications in physical and engineering phenomena.
Mohammed Shqair
doaj   +1 more source

Predicting Crystal Structures and Ionic Conductivities in Li3YCl6−xBrx Halide Solid Electrolytes Using a Fine‐Tuned Machine Learning Interatomic Potential

Advanced Intelligent Systems, EarlyView.
This study refines the Crystal Hamiltonian Graph Network to predict energies, structures, and lithium‐ion dynamics in halide electrolytes. By generating ordered structural models and using an iterative fine‐tuning workflow, we achieve near‐ab initio accuracy for phase stability and ionic transport predictions.
Jonas Böhm, Aurélie Champagne
wiley   +1 more source

A simple monodimensional model coupling an enthalpy transport equation and a neutron diffusion equation

Applied Mathematics Letters, 2016
The authors construct an analytic solution of a simplified stationary thermohydraulics neutronics model with minimal hypotheses on the absorption and fission cross sections, and on the diffusion coefficient \[ \frac{d}{dz}(\rho u)=0, \] \[ \frac{d}{dz}(\rho u^2+\pi)\rho g, \] \[ \rho u\frac{d}{dz}h=E \sum_f(h)\phi(t,z) \] coupled to the simplified ...
Stéphane Dellacherie, Erell Jamelot, Olivier D. Lafitte   +2 more
openaire   +3 more sources