Publications

 

rid-idsymbol4.gif 

Alexandra Jahn, Jennifer E. Kay, Marika M. Holland, David M. Hall  “How predictable is the timing of a summer ice-free Arctic” Geophysical Research Letters 43.17 (2016): 9113-9120

Hall, David M., et al. “Dynamical Core Model Intercomparison Project (DCMIP) tracer transport test results for CAM‐SE.” Quarterly Journal of the Royal Meteorological Society 142.697 (2016): 1672-1684.

Hall, David M., and Ramachandran D. Nair. “Discontinuous Galerkin transport on the spherical Yin–Yang overset mesh.” Monthly Weather Review 141.1 (2013): 264-282.

Hall, D. M. (2007). “Hydrodynamic self-consistent field theory: Computational fluid dynamics for inhomogeneous polymeric fluids and nano composites” (Order No. 3252799). Available from ProQuest Dissertations & Theses A&I. (304882009).

Hall, David M., Turab Lookman, and Sanjoy Banerjee. “Non-equilibrium particle-field simulations of polymer-nanocomposite dynamics.” Chemical Engineering Science 64.22 (2009): 4754-4757.

Hall, David M., et al. “Numerical method for hydrodynamic transport of inhomogeneous polymer melts.” Journal of Computational Physics 224.2 (2007): 681-698.

Hall, David M., et al. “Hydrodynamic self-consistent field theory for inhomogeneous polymer melts.” Physical review letters 97.11 (2006): 114501.

Hall, David M., et al. “Numerical method for hydrodynamic transport of inhomogeneous polymer melts.” Journal of Computational Physics 224.2 (2007): 681-698.

Banerjee, Sanjoy, David M. Hall, et al. “The direct numerical simulation of two-phase flows with interface capturing methods.” Houille blanche 5 (2005): 41.

Bildsten, Lars, and David M. Hall.Gravitational settling of 22Ne in liquid white dwarf interiors.” The Astrophysical Journal Letters 549.2 (2001): L219.

Research Projects

A Nonhydrostatic Atmospheric Dynamical-Core

A nonhydrostatic atmospheric version of the CAM-SE dynamical core is under development for use in the ACME and CESM global climate models. Nonhydrostatic models solve Euler’s equations of motion in a rotating reference frame, without using the vertical hydrostatic-balance approximation. They resolve grid cells smaller than 10km and are required for very high resolution simulations of Earth’s climate and weather.

dcmip21_w_t63.png
Vertical velocity field, flow over orography, non-hydrostatic

A High Order Vertical Representation in CAM-SE

We are investigating the impact of improving the vertical representation in the CAM-SE atmospheric model, by using a high-order Spectral Element (SE) discretization, rather than the traditional 2nd order mimetic finite-difference formulation currently in place. Initial results show impressive improvements in the quality of several standard dry dynamical core tests. A poster showing some results of both the Nonhydrostatic and High-Order Vertical projects is shown below.

(download pdf)

dhall_poster_june2016
Poster presented at the 2016 CESM Workshop in Breckenridge, CO

Immersed Boundaries for moving surfaces in fluid dynamics simulations

vorticity_re1000
Immersed Boundary simulation of flow past a fixed cylinder with Reynolds Number=1000.

(details coming soon)

Complex Polymeric Fluids: Multi-block Copolymers, Blends, and Nano-composites

diblock37_3d2.png

Three-dimensional simulation of the dynamics of a diblock copolymer melt.

(details coming soon)