66 citations · 76 across the 10 of their papers we have counts for
11 papers
RF-Specific Tungsten Erosion and Global Transport in ITER under Neon Seeding
Atul Kumar, Dhyanjyoti Nath, Wouter Tierens +15
Ion cyclotron radio-frequency heating (ICRH) is a key auxiliary heating system in ITER, but high-power RF operation can enhance plasma-material interactions through rectified RF sh…
Curved Mesh Adaptation for High-Order Finite Element Simulations
Aditya Yogesh Joshi, Mark S. Shephard
The ability to take advantage of computationally efficient high-order finite element methods to perform adaptive finite element analysis of complex engineering problems over genera…
Unstructured Mesh Tools for Fusion Energy System Design
Mark S. Shephard, Jacob S. Merson, Onkar Sahni +6
The execution of accurate simulations of fusion energy systems requires the appropriate representation of critical component geometries as well as the coupling of complex fusion ph…
Understanding Carbon Sourcing and Transport Originating from the Helicon Antenna Surfaces During High-Power Helicon Discharge in DIII-D Tokamak
A. Kumar, D. Nath, W. Tierens +11
The high-power helicon wave system in the DIII-D tokamak introduces new plasma--material interaction (PMI) challenges due to rectified RF sheath potentials forming near antenna str…
PCMS: Parallel Coupler For Multimodel Simulations
Jacob S. Merson, Cameron W. Smith, Mark S. Shephard +5
This paper presents the Parallel Coupler for Multimodel Simulations (PCMS), a new GPU accelerated generalized coupling framework for coupling simulation codes on leadership class s…
GPU Acceleration of Monte Carlo Tallies on Unstructured Meshes in OpenMC with PUMI-Tally
Fuad Hasan, Cameron W. Smith, Mark S. Shephard +5
Unstructured mesh tallies are a bottleneck in Monte Carlo neutral particle transport simulations of fusion reactors. This paper introduces the PUMI-Tally library that takes advanta…
A new open source framework for multiscale modeling of fibrous materials on heterogeneous supercomputers
Jacob Merson, Catalin Picu, Mark S. Shephard
This article presents MuMFiM, an open source application for multiscale modeling of fibrous materials on massively parallel computers. MuMFiM uses two scales to represent fibrous m…
Using Hierarchical Parallelism to Accelerate the Solution of Many Small Partial Differential Equations
Jacob Merson, Mark S. Shephard
This paper presents efforts to improve the hierarchical parallelism of a two scale simulation code. Two methods to improve the GPU parallel performance were developed and compared.…
Efficient Exascale Discretizations: High-Order Finite Element Methods
Tzanio Kolev, Paul Fischer, Misun Min +27
Efficient exploitation of exascale architectures requires rethinking of the numerical algorithms used in many large-scale applications. These architectures favor algorithms that ex…
Boundary Layer Adaptivity For Incompressible Turbulent Flows
Kedar C. Chitale, Michel Rasquin, Onkar Sahni +2
Boundary layers in turbulent flows require fine grid spacings near the walls which depend on the choice of turbulence model. To satisfy these requirements a semi-structured mesh is…
Anisotropic Boundary Layer Adaptivity of Multi-Element Wings
Kedar C. Chitale, Michel Rasquin, Onkar Sahni +2
Multi-element wings are popular in the aerospace community due to their high lift performance. Turbulent flow simulations of these configurations require very fine mesh spacings es…