Publications

Publications

Subsurface Transport Modeling Using Adaptive Finite Elements

This paper presents GWADAPT, a Computational Fluid Dynamics model that utilizes an adaptive finite element method for simulating groundwater flow and subsurface contaminant transport. It highlights how this numerical approach, through local mesh adaptation, provides an efficient and accessible solution for complex environmental transport problems on various computing platforms.

Detached Eddy Simulations of lncom Pressible Turbulent Flows Using the Finite Element Method

G. Laskowski

This paper explores the implementation and validation of the Spalart-Allmaras turbulence model for incompressible turbulent flows using the finite element method within a Computational Fluid Dynamics (CFD) framework. It compares RANS and DES formulations, highlighting the strengths and limitations of each in capturing turbulent flow characteristics, particularly near solid boundaries.

Performance Enhancements of Monte Carlo Particle Tracing Algorithms for Large, Arbitrary Geometries

Charles N. Zeeb and Patrick J. Burns

This paper focuses on enhancing the performance of Monte Carlo particle tracing algorithms for radiative heat transfer in complex geometries. It details an efficient particle intersection algorithm and the implementation of Uniform Spatial Division (USD), demonstrating significant speedups in tracing time. The study aims to make Monte Carlo simulations more computationally efficient for large-scale problems.

Performance and Accuracy Enhancements of Radiative Heat Transfer Modeling via Monte Carlo

Charles Nelson Zeeb

This technical paper delves into enhancing the efficiency and precision of radiative heat transfer modeling using Monte Carlo simulations. It presents a refined particle tracing algorithm for intricate geometries and introduces a reciprocity estimation smoothing technique, utilizing statistical methods to boost the accuracy of Monte Carlo outcomes.

Isentropic Compression in a Strip Line, Numerical Simulations and Comparison with GEPI Shot 268

A. Lefrançois, P.L. 'Eplattenier, M. Burger

This paper validates a new electromagnetism module in LS-DYNA by simulating an isentropic compression experiment of a copper strip line. The coupled mechanical-thermal-electromagnetic simulations are compared against experimental data from the GEPI facility's shot 268. Results for the Free Surface Velocity show good agreement with experiments after accounting for measurement uncertainty in the input current.