User profiles for Nate Morgan
 | Nathaniel MorganLos Alamos National Laboratory Verified email at lanl.gov Cited by 1219 |
Reduction of dissipation in Lagrange cell-centered hydrodynamics (CCH) through corner gradient reconstruction (CGR)
This work presents an extension of a second order cell-centered hydrodynamics scheme on
unstructured polyhedral cells [13] toward higher order. The goal is to reduce dissipation, …
unstructured polyhedral cells [13] toward higher order. The goal is to reduce dissipation, …
A Lagrangian discontinuous Galerkin hydrodynamic method
We present a new Lagrangian discontinuous Galerkin (DG) hydrodynamic method for solving
the two-dimensional gas dynamic equations on unstructured hybrid meshes. The physical …
the two-dimensional gas dynamic equations on unstructured hybrid meshes. The physical …
A three-dimensional finite element arbitrary Lagrangian–Eulerian method for shock hydrodynamics on unstructured grids
We present a three-dimensional (3D) finite element (FE) arbitrary Lagrangian–Eulerian (ALE)
method for shock hydrodynamics on unstructured grids. The method is based on an FE …
method for shock hydrodynamics on unstructured grids. The method is based on an FE …
A high-order Lagrangian discontinuous Galerkin hydrodynamic method for quadratic cells using a subcell mesh stabilization scheme
We present a Lagrangian discontinuous Galerkin (DG) hydrodynamic method that is up to
third-order accurate using subcell mesh stabilization (SMS) for compressible flows on …
third-order accurate using subcell mesh stabilization (SMS) for compressible flows on …
On the origins of Lagrangian hydrodynamic methods
NR Morgan, BJ Archer - Nuclear Technology, 2021 - Taylor & Francis
The intent of this paper is to discuss the history and origins of Lagrangian hydrodynamic
methods for simulating shock-driven flows. The majority of the pioneering research occurred …
methods for simulating shock-driven flows. The majority of the pioneering research occurred …
[HTML][HTML] An approach for treating contact surfaces in Lagrangian cell-centered hydrodynamics
A new method is presented for modeling contact surfaces in Lagrangian cell-centered
hydrodynamics (CCH). The contact method solves a multi-directional Riemann-like problem at …
hydrodynamics (CCH). The contact method solves a multi-directional Riemann-like problem at …
A 3D finite element ALE method using an approximate Riemann solution
VP Chiravalle, NR Morgan - International Journal for Numerical …, 2017 - Wiley Online Library
Arbitrary Lagrangian–Eulerian finite volume methods that solve a multidimensional Riemann‐like
problem at the cell center in a staggered grid hydrodynamic (SGH) arrangement have …
problem at the cell center in a staggered grid hydrodynamic (SGH) arrangement have …
Compatible, energy conserving, bounds preserving remap of hydrodynamic fields for an extended ALE scheme
From the very origins of numerical hydrodynamics in the Lagrangian work of von Neumann
and Richtmyer [83], the issue of total energy conservation as well as entropy production has …
and Richtmyer [83], the issue of total energy conservation as well as entropy production has …
[HTML][HTML] Viscoplastic self-consistent formulation as generalized material model for solid mechanics applications
The viscoplastic self-consistent (VPSC) formulation is extended into a generalized material
model/code (VPSC-GMM) that can be easily called by different explicit and implicit boundary-…
model/code (VPSC-GMM) that can be easily called by different explicit and implicit boundary-…
Reducing spurious mesh motion in Lagrangian finite volume and discontinuous Galerkin hydrodynamic methods
The Lagrangian finite volume (FV) cell-centered hydrodynamic (CCH) method and the
Lagrangian discontinuous Galerkin (DG) CCH method have been demonstrated to be quite stable …
Lagrangian discontinuous Galerkin (DG) CCH method have been demonstrated to be quite stable …