What are the different approaches to introducing cascade in multiscale modeling of irradiated materials?
Best insight from top research papers
In the multiscale modeling of irradiated materials, various approaches are employed to introduce cascades. One method involves utilizing statistical averages of collision cascades from molecular dynamics (MD) simulations to provide inputs for Kinetic Monte Carlo (KMC) simulations, enabling the handling of larger sizes and longer durations . Another approach focuses on modeling the distribution of sizes of defect clusters formed by high-energy impacts, providing initial conditions for quantitative multi-scale simulations of microstructural evolution . Additionally, a modified "rate theory" approach incorporates pulsed sources to capture the discrete occurrence of distinct displacement damage cascades, revealing the elimination of defect populations by absorption and recombination before new defects are introduced, impacting the overall defect dynamics . These diverse strategies contribute to a comprehensive understanding of cascade effects in irradiated materials.
Answers from top 4 papers
More filters
| Papers (4) | Insight |
|---|---|
| The paper introduces a rate-theory approach with random cascades in space and time to model irradiation damage, capturing discrete occurrence of displacement damage cascades in multiscale modeling. | |
| Not addressed in the paper. | |
01 Oct 2016 | Statistical averages from MD simulations are used to input Kinetic Monte Carlo simulations for handling larger scales, more defects, and longer durations in multiscale modeling of irradiated materials. |
| The paper introduces a model for defect cluster size distribution from high-energy impacts in tungsten, aiding in providing initial conditions for multiscale simulations of microstructural evolution in irradiated materials. |
Related Questions
On which theory most of the concurrent multiscale models are based?5 answersConcurrent multiscale models are based on various theories. One common theory is the combination of discrete dislocation dynamics (DDD) and the finite element method (FEM). Another theory involves the use of classical molecular dynamics to model material behavior at the atomic level and finite element method for non-critical regions. Additionally, there are hierarchical and semiconcurrent multiscale methods that utilize techniques such as homogenization and representative volume element-based methods. Some models also incorporate adaptive clustering-based domain decomposition strategies to reduce spatial degrees of freedom. Furthermore, a concurrent multiscale model for simulating crack propagation in fiber-reinforced composite materials is based on a domain decomposition technique with an adaptive zooming-in strategy. Overall, concurrent multiscale models are based on a combination of different theories and techniques depending on the specific application.
What the concept of multiscale modeling in batteries?4 answersMultiscale modeling in batteries refers to the use of computational models that incorporate multiple length scales to study the complex phenomena occurring in battery systems. These models aim to bridge the gap between the microscopic and macroscopic scales, allowing for a more comprehensive understanding of battery behavior. The multiscale approach involves simulating processes at different scales, such as the microscale, mesoscale, and macroscale, and integrating them to capture the interactions and dynamics of various components within the battery. This includes phenomena such as mass transfer, charge transport, and electrochemical reactions. By considering multiple scales, multiscale modeling provides insights into the performance, degradation, and safety of batteries, enabling the design and optimization of battery systems for specific applications.
Why multiscale modeling of pyrolysis?5 answersMultiscale modeling of pyrolysis is necessary to bridge the gaps between different scales and accurately simulate the process. It allows for the coupling of sub-models at various scales, such as detailed kinetics, intra-particle models, drag models, and heat transfer models, to capture the complex phenomena involved in biomass pyrolysis. The process of biomass thermal degradation involves multiple unit processes at different scales, including molecular, single-particle, and reactor models. Each submodel provides insights into the chemical changes, thermo-physical behavior, and interactions between particles and gases. Catalytic fast pyrolysis, in particular, requires coordination of chemical and physical phenomena spanning large length and time scales, making multiscale modeling crucial for its successful deployment. Additionally, modeling biomass pyrolysis helps in understanding reaction mechanisms, predicting structural changes, and optimizing the synthesis and manufacturing process of carbon nanotubes. Overall, multiscale modeling enables a holistic understanding of pyrolysis processes and aids in the development of efficient and sustainable technologies.
Whats is a cascade raction5 answersA cascade reaction refers to a series of interconnected reactions that occur in multiple reactor units. These reactor units consist of reaction parts and absorption parts, with a connecting line and pressure reduction valve between them. Cascade reactions can be used in various fields such as gate protection circuits, program analysis tools, communication methods, and refrigeration systems. In gate protection circuits, cascade circuits are designed to reduce the equivalent Miller capacitance of enhanced devices, allowing for faster switching speeds. In program analysis tools, cascade is a static program analysis tool that uses bounded model checking to detect bugs and verify program correctness. In communication methods, cascade communication allows for power supply demands to be transmitted between devices, solving the problem of supplying power to multiple devices simultaneously. In refrigeration systems, cascade refrigeration systems use multiple circulation loops and condensers to improve reliability and efficiency.
Why anisotropic modelling of dislocation is required?5 answersAnisotropic modeling of dislocations is required because it allows for a more accurate representation of the elastic interactions and reactions of dislocations in materials.Dislocations can create complex substructures, and their interactions with neighboring dislocations can lead to the formation of arrays of long, straight edge dislocations that act as barriers to subsequent slip.Additionally, anisotropic modeling takes into account the anisotropic stress distribution around dislocation loops, which can have a significant impact on the deformation behavior of crystalline solids.Anisotropic modeling also considers the core field of dislocations, which can interact with external stresses and result in additional forces on dislocations.Overall, anisotropic modeling provides a more comprehensive understanding of the behavior of dislocations and their effects on the mechanical properties of materials.
What is Multiscale electromagnetic modeling?5 answersMultiscale electromagnetic modeling is a technique used to numerically simulate and model complex electromagnetic phenomena at different scales. It involves capturing the behavior and interactions of electromagnetic fields and materials at both macroscopic and microscopic levels. This approach allows for a more comprehensive understanding of the electromagnetic behavior of materials and devices, taking into account factors such as temperature, mechanical stress, and microstructure evolution. Multiscale modeling can be used to study a wide range of electromagnetic systems, including antennas with metasurfaces, ferromagnetic materials, suspensions of magnetizable particles in fluids, and the wear process of solid armatures in electromagnetic railguns. By combining different modeling techniques and scales, multiscale electromagnetic modeling provides insights into the complex behavior of electromagnetic systems and enables the design and optimization of practical engineering devices.