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.
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.
Poster presented at the 2016 CESM Workshop in Breckenridge, CO
Immersed Boundaries for moving surfaces in fluid dynamics simulations
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
Three-dimensional simulation of the dynamics of a diblock copolymer melt.
(details coming soon)
David M. Hall 