Browsing Center for Computational Science and Engineering (CCSE) by Title
Now showing items 25-44 of 73
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Experimental study and modeling analysis of ion transport membranes for methane partial oxidation and oxyfuel combustion
(Massachusetts Institute of Technology, 2017)The atmospheric concentration of CO 2 has recently exceeded 400 (ppm) (up from 285 (ppm) in 1850), largely because of the burning of fossil fuels. Despite the growth of alternatives, these fuels will continue to play a ... -
Fast modeling of multi-phase mixture transport in piston/ring/liner system via GAN-augmented progressive modeling
(Massachusetts Institute of Technology, 2020)As a continued effort to advance the understanding of the power cylinder system and design capacities, we develop a modeling framework for multi-phase macro mixture transport that integrates all length scales, time scales ... -
Finite element solution of interface and free surface three-dimensional fluid flow problems using flow-condition-based interpolation
(Massachusetts Institute of Technology, 2015)The necessity for a highly accurate simulation scheme of free surface flows is emphasized in various industrial and scientific applications. To obtain an accurate response prediction, mass conservation must be satisfied. ... -
First-principles approaches for accurate predictions of nanostructured materials
(Massachusetts Institute of Technology, 2019)Nanostructured materials have attracted increasing interest in recent years due to their unusual mechanical, electrical, electronic and optical properties. First-principles electronic structure calculations (e.g., with ... -
From Spheres to Sheets: Colloidal Hydrodynamics, Thermodynamics, and Statistical Inference
(Massachusetts Institute of Technology, 2021-09)This thesis involves the development of Bayesian methods for statistical inference of distributions, the construction of optimization and thermodynamic sampling algorithms, and the use of hydrodynamical simulations to ... -
Full core 3D neutron transport simulation using the method of characteristics with linear sources
(Massachusetts Institute of Technology, 2018)The development of high fidelity multi-group neutron transport-based simulation tools for full core Light Water Reactor (LWR) analysis has been a long-standing goal of the reactor physics community. While direct transport ... -
Impact of fuel and oxidizer composition on premixed flame stabilization in turbulent swirling flows : dynamics and scaling
(Massachusetts Institute of Technology, 2016)The world relies on fossil fuels as its main energy source (86.7% in 1973, 81.7% in 2012). Several factors including the abundance of resources and the existing infrastructure suggest that this is likely to continue in the ... -
An inverse problem framework for reconstruction of phonon properties using solutions of the Boltzmann transport equation
(Massachusetts Institute of Technology, 2019)A methodology for reconstructing phonon properties in a solid material, such as the frequency-dependent relaxation time distribution, from thermal spectroscopy experimental results is proposed and extensively validated. ... -
Learning Mixed Multinomial Logit Models
(Massachusetts Institute of Technology, 2022-09)Multinomial logit (MNL) model is widely used to predict the probabilities of different outcomes. However, standard MNL model suffers from several issues, including but not limited to heterogeneous population, the restricted ... -
Leveraging the Linear Response Theory in Sensitivity Analysis of Chaotic Dynamical Systems and Turbulent Flows
(Massachusetts Institute of Technology, 2023-06)The linear response theory (LRT) provides a set of powerful mathematical tools for the analysis of system’s reactions to controllable perturbation. In applied sciences, LRT is particularly useful in approximating parametric ... -
Mathematical and Computational Foundations to Enable Predictive Digital Twins at Scale
(Massachusetts Institute of Technology, 2021-06)A digital twin is a computational model that evolves over time to persistently represent a unique physical asset. Digital twins underpin intelligent automation by enabling asset-specific analysis and data-driven decision-making. ... -
Mathematical and Computational Modeling of Injection-induced Seismicity
(Massachusetts Institute of Technology, 2023-02)It has long been recognized that pumping fluids into or out of the Earth has the potential to cause earthquakes. Some of the earliest field evidence dates to the 1960s, when earthquakes were turned on and off by water ... -
Model order reduction methods for data assimilation : state estimation and structural health monitoring
(Massachusetts Institute of Technology, 2017)The objective of this thesis is to develop and analyze model order reduction approaches for the efficient integration of parametrized mathematical models and experimental measurements. Model Order Reduction (MOR) techniques ... -
Modeling Feedback Effects of Transient Nuclear Systems Using Monte Carlo
(Massachusetts Institute of Technology, 2023-06)Monte Carlo neutron transport is the gold standard for accurate neutronics simulation of nuclear reactors in steady-state because each term of the neutron transport equation can be directly tallied using continuous-energy ... -
Modeling of piston pin lubrication in internal combustion engines
(Massachusetts Institute of Technology, 2020)The piston pin joins the piston and the connecting rod to transfer the linear force on the piston to rotate the crankshaft that is the eventual power outlet of the engine. The interfaces between the piston pin and the pin ... -
A molecular dynamics study of the tribological properties of diamond like carbon
(Massachusetts Institute of Technology, 2020)Diamond like carbon (DLC) is an attractive choice as a coating for mechanical components, because of its excellent wear resistance and very low coefficient of friction . We use molecular dynamics (MD) simulations with a ... -
A Monte Carlo framework for nuclear data uncertainty propagation via the windowed multipole formalism
(Massachusetts Institute of Technology, 2020)A new framework has been developed that calculates the uncertainty in calculated quantities, such as K[subscript eff], reactivity coefficients, multigroup cross sections, and reaction rate ratios, that arise due to ... -
Multi-agent real-time decision making in water resources systems
(Massachusetts Institute of Technology, 2018)Optimal utilization of natural resources such as water, wind and land over extended periods of time requires a carefully designed framework coupling decision making and a mathematical abstraction of the physical system. ... -
New overlapping finite elements and their application in the AMORE paradigm
(Massachusetts Institute of Technology, 2020)The finite element method has become a fundamental analysis tool for modern sciences and engineering. Despite the great improvement in theory and application over the past decades, the need for regular conforming meshes ... -
A novel equivalence method for high fidelity hybrid stochastic-deterministic neutron transport simulations
(Massachusetts Institute of Technology, 2020)With ever increasing available computing resources, the traditional nuclear reactor physics computation schemes, that trade off between spatial, angular and energy resolution to achieve low cost highly-tuned simulations, ...