87 citations · 218 across the 13 of their papers we have counts for
14 papers
Causal Multi-fidelity Surrogate Forward and Inverse Models for ICF Implosions
Tyler E. Maltba, Ben S. Southworth, Jeffrey R. Haack +1
Continued progress in inertial confinement fusion (ICF) requires solving inverse problems relating experimental observations to simulation input parameters, followed by design opti…
A Nonlinear, Conservative, Entropic Fokker-Planck Model for Multi-Species Collisions
Evan Habbershaw, Cory D. Hauck, Jingwei Hu +1
A multi-species Fokker-Planck model for simulating particle collisions in a plasma is presented. The model includes various parameters that must be tuned. Under reasonable assumpti…
On a spectral method for -particle bound excitation collisions in kilonovae
Ryan T. Wollaeger, Chris L. Fryer, Robert Chiodi +9
The interaction of -particles with the weakly ionized plasma background is an important mechanism for powering the kilonova transient signal from neutron star mergers. For this…
Asymptotic Relaxation of Moment Equations for a Multi-Species, Homogeneous BGK Model
Evan Habbershaw, Ryan S. Glasby, Jeffrey R. Haack +2
Multi-species BGK models describe the dynamics of rarefied gases with constituent particles of different elements or compounds with potentially non-trivial velocity distributions.…
Predictive Scale-Bridging Simulations through Active Learning
Satish Karra, Mohamed Mehana, Nicholas Lubbers +12
Throughout computational science, there is a growing need to utilize the continual improvements in raw computational horsepower to achieve greater physical fidelity through scale-b…
Numerical schemes for a multi-species BGK model with velocity-dependent collision frequency
Jeffrey Haack, Cory Hauck, Christian Klingenberg +2
We consider a kinetic description of a multi-species gas mixture modeled with Bhatnagar-Gross-Krook (BGK) collision operators, in which the collision frequency varies not only in t…
A consistent BGK model with velocity-dependent collision frequency for gas mixtures
Jeff Haack, Cory Hauck, Christian Klingenberg +2
We derive a multi-species BGK model with velocity-dependent collision frequency for a non-reactive, multi-component gas mixture. The model is derived by minimizing a weighted entro…
Review of the First Charged-Particle Transport Coefficient Comparison Workshop
P. E. Grabowski, S. B. Hansen, M. S. Murillo +42
We present the results of the first Charged-Particle Transport Coefficient Code Comparison Workshop, which was held in Albuquerque, NM October 4-6, 2016. In this first workshop, sc…
A fast spectral method for the Boltzmann collision operator with general collision kernels
Irene M. Gamba, Jeffrey R. Haack, Cory D. Hauck +1
We propose a simple fast spectral method for the Boltzmann collision operator with general collision kernels. In contrast to the direct spectral method \cite{PR00, GT09} which requ…
A conservative spectral method for the Boltzmann equation with anisotropic scattering and the grazing collisions limit
Irene M. Gamba, Jeffrey R. Haack
We present the formulation of a conservative spectral scheme for Boltzmann collision operators with anisotropic scattering mechanisms to model grazing collision limit regimes appro…
A Spectral-Lagrangian Boltzmann Solver for a Multi-Energy Level Gas
Alessandro Munafo, Jeffrey R. Haack, Irene M. Gamba +1
In this paper a spectral-Lagrangian method for the Boltzmann equation for a multi-energy level gas is proposed. Internal energy levels are treated as separate species and inelastic…
A hybrid OpenMP and MPI implementation of a conservative spectral method for the Boltzmann equation
Jeffrey Haack
We demonstrate the implementation of a hybrid OpenMP and MPI parallelization of a conservative spectral method for the Boltzmann equation originally developed by Gamba and Tharkabh…
High Performance Computing with a Conservative Spectral Boltzmann Solver
Irene M. Gamba, Jeffrey R. Haack
We present new results building on the conservative deterministic spectral method for the space inhomogeneous Boltzmann equation developed by Gamba and Tharkabhushaman. This approa…
Conservative Deterministic Spectral Boltzmann Solver Near the Grazing Collisions Limit
Irene M. Gamba, Jeffrey R. Haack
We present new results building on the conservative deterministic spectral method for the space homogeneous Boltzmann equation developed by Gamba and Tharkabhushaman. This approach…