Marianne M. Francois

Los Alamos National Laboratory

AlgorithmPhysicsVolume of fluid methodEngineeringMathematical analysisCartesian coordinate systemPiecewise linear functionMaterials scienceCurvatureGeometryPolygon meshMathematicsComputer scienceComputational scienceNumerical analysisHeat transferMechanicsDynamics (mechanics)Classical mechanicsFlow (psychology)Mechanical engineeringSurface tension

88Publications

19H-index

1,773Citations

Publications 78

Newest

#1Supriyo Ghosh (LANL: Los Alamos National Laboratory)H-Index: 12

#2Christopher K. Newman (LANL: Los Alamos National Laboratory)H-Index: 8

Last. Marianne M. Francois (LANL: Los Alamos National Laboratory)H-Index: 19

view all 3 authors...

Abstract null null We develop a fully-coupled, fully-implicit approach for phase-field modeling of solidification in metals and alloys. Predictive simulation of solidification in pure metals and metal alloys remains a significant challenge in the field of materials science, as microstructure formation during the solidification process plays a critical role in the properties and performance of the solid material. Our simulation approach consists of a finite element spatial discretization of the f...

#1Thomas M. Evans (ORNL: Oak Ridge National Laboratory)H-Index: 21

#2Andrew R. Siegel (Argonne National Laboratory)H-Index: 21

Last. Daniel F. Martin (LBNL: Lawrence Berkeley National Laboratory)H-Index: 19

view all 8 authors...

The US Department of Energy Office of Science and the National Nuclear Security Administration initiated the Exascale Computing Project (ECP) in 2016 to prepare mission-relevant applications and scientific software for the delivery of the exascale computers starting in 2023. The ECP currently supports 24 efforts directed at specific applications and six supporting co-design projects. These 24 application projects contain 62 application codes that are implemented in three high-level languages—C, ...

#1Marianne M. Francois (LANL: Los Alamos National Laboratory)H-Index: 19

#1Supriyo GhoshH-Index: 12

#2Christopher K. NewmanH-Index: 8

Last. Marianne M. FrancoisH-Index: 19

view all 3 authors...

We develop a fully-coupled, fully-implicit approach for phase-field modeling of solidification in metals and alloys. Predictive simulation of solidification in pure metals and metal alloys remains a significant challenge in the field of materials science, as microstructure formation during the solidification process plays a critical role in the properties and performance of the solid material. Our simulation approach consists of a finite element spatial discretization of the fully-coupled nonlin...

#1Francis J. Alexander (BNL: Brookhaven National Laboratory)H-Index: 4

#2Ann S. Almgren (LBNL: Lawrence Berkeley National Laboratory)H-Index: 44

Last. Katherine YelickH-Index: 63

view all 51 authors...

As noted in Wikipedia, skin in the game refers to having incurred risk by being involved in achieving a goal, where skin is a synecdoche for the person involved, and game is the metaphor for action...

#1Abigail Hunter (LANL: Los Alamos National Laboratory)H-Index: 20

#2Tariq D. Aslam (LANL: Los Alamos National Laboratory)H-Index: 21

Last. W. S. Wilburn (LANL: Los Alamos National Laboratory)H-Index: 14

view all 8 authors...

Effects of operator splitting and low Mach-number correction in turbulent mixing transition simulations

#1Fernando F. Grinstein (LANL: Los Alamos National Laboratory)H-Index: 34

#2Juan A. Saenz (LANL: Los Alamos National Laboratory)H-Index: 6

Last. Marianne M. Francois (LANL: Los Alamos National Laboratory)H-Index: 19

view all 6 authors...

Abstract Transition and turbulence decay with the Taylor–Green vortex have been effectively used to demonstrate emulation of high Reynolds-number ( R e ) physical dissipation through numerical convective effects of various non-oscillatory finite-volume algorithms for implicit large eddy simulation (ILES), e.g. using the Godunov-based Eulerian adaptive mesh refinement code xRAGE. The inverse-chevron shock tube experiment simulations have been also used to assess xRAGE based ILES for shock driven ...

#1Zechariah J. Jibben (LANL: Los Alamos National Laboratory)H-Index: 4

#2Jan Velechovsky (LANL: Los Alamos National Laboratory)H-Index: 2

Last. Marianne M. Francois (LANL: Los Alamos National Laboratory)H-Index: 19

view all 4 authors...

Abstract We present a numerical approach to model surface tension between immiscible materials within an inviscid compressible flow solver. The material interface is represented using the volume of fluid technique with piecewise-linear interface reconstructions. We employ the continuum surface force to model surface tension, and have implemented it in the context of the MUSCL-Hancock finite volume method for the Euler equations on an adaptively refined Eulerian mesh. We show results from droplet...

#1Jan Velechovsky (LANL: Los Alamos National Laboratory)H-Index: 2

#2Marianne M. Francois (LANL: Los Alamos National Laboratory)H-Index: 19

Last. Thomas Masser (LANL: Los Alamos National Laboratory)H-Index: 4

view all 3 authors...

Abstract In the context of finite volume methods for hyperbolic systems of conservation laws, slope limiters are an effective way to suppress creation of unphysical local extrema and/or oscillations near discontinuities. We investigate properties of these limiters as applied to piecewise linear reconstructions of conservative fluid quantities in three-dimensional simulations. In particular, we are interested in linear reconstructions on Cartesian adaptively refined meshes, where a reconstructed ...

A paraboloid fitting technique for calculating curvature from piecewise-linear interface reconstructions on 3D unstructured meshes

#1Zechariah J. Jibben (LANL: Los Alamos National Laboratory)H-Index: 4

#2Neil N. Carlson (LANL: Los Alamos National Laboratory)H-Index: 2

Last. Marianne M. Francois (LANL: Los Alamos National Laboratory)H-Index: 19

view all 3 authors...

Abstract We present a novel method for calculating interface curvature on 3D unstructured meshes from piecewise-linear interface reconstructions typically generated in the volume of fluid method. Interface curvature is a necessary quantity to calculate in order to model surface tension driven flow. Curvature needs only to be computed in cells containing an interface. The approach requires a stencil containing only neighbors sharing a node with a target cell, and calculates curvature from a least...

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