370 citations · 1.3k across the 36 of their papers we have counts for
11 papers · 1 filter
Hybrid-Delta Tracking on a Structured Mesh in MCATK
J. P. Morgan, Travis J. Trahan, Timothy P. Burke +2
Monte Carlo Application Toolkit (MCATK) commonly uses surface tracking on a structured mesh to compute scalar fluxes. In this mode, higher fidelity requires more mesh cells and iso…
Development of MC/DC: a performant, scalable, and portable Python-based Monte Carlo neutron transport code
Ilham Variansyah, J. P. Morgan, Jordan Northrop +2
We discuss the current development of MC/DC (Monte Carlo Dynamic Code). MC/DC is primarily designed to serve as an exploratory Python-based MC transport code. However, it seeks to…
Exploring One-Cell Inversion Method for Transient Transport on GPU
J. P. Morgan, Ilham Variansyah, Todd S. Palmer +1
To find deterministic solutions to the transient neutron transport equation, iterative schemes are typically used to treat the scattering (and fission) source terms. We explo…
Accelerating reactive-flow simulations using vectorized chemistry integration
Nicholas J. Curtis, Kyle E. Niemeyer, Chih-Jen Sung
The high cost of chemistry integration is a significant computational bottleneck for realistic reactive-flow simulations using operator splitting. Here we present a methodology to…
Using SIMD and SIMT vectorization to evaluate sparse chemical kinetic Jacobian matrices and thermochemical source terms
Nicholas J. Curtis, Kyle E. Niemeyer, Chih-Jen Sung
Accurately predicting key combustion phenomena in reactive-flow simulations, e.g., lean blow-out, extinction/ignition limits and pollutant formation, necessitates the use of detail…
Accelerating solutions of one-dimensional unsteady PDEs with GPU-based swept time-space decomposition
Daniel J Magee, Kyle E Niemeyer
The expedient design of precision components in aerospace and other high-tech industries requires simulations of physical phenomena often described by partial differential equation…
An initial investigation of the performance of GPU-based swept time-space decomposition
Daniel Magee, Kyle E Niemeyer
Simulations of physical phenomena are essential to the expedient design of precision components in aerospace and other high-tech industries. These phenomena are often described by…
Accelerating finite-rate chemical kinetics with coprocessors: comparing vectorization methods on GPUs, MICs, and CPUs
Christopher P. Stone, Andrew T. Alferman, Kyle E. Niemeyer
Efficient ordinary differential equation solvers for chemical kinetics must take into account the available thread and instruction-level parallelism of the underlying hardware, esp…
An investigation of GPU-based stiff chemical kinetics integration methods
Nicholas J. Curtis, Kyle E. Niemeyer, Chih-Jen Sung
A fifth-order implicit Runge-Kutta method and two fourth-order exponential integration methods equipped with Krylov subspace approximations were implemented for the GPU and paired…
pyJac: analytical Jacobian generator for chemical kinetics
Kyle E. Niemeyer, Nicholas J. Curtis, Chih-Jen Sung
Accurate simulations of combustion phenomena require the use of detailed chemical kinetics in order to capture limit phenomena such as ignition and extinction as well as predict po…
Accelerating moderately stiff chemical kinetics in reactive-flow simulations using GPUs
Kyle E Niemeyer, Chih-Jen Sung
The chemical kinetics ODEs arising from operator-split reactive-flow simulations were solved on GPUs using explicit integration algorithms. Nonstiff chemical kinetics of a hydrogen…