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Predicting The Impacts Of Mississippi River Diversions And Sea-Level Rise On Spatial Patterns Of Eastern Oyster Growth Rate And Production, Hongqing Wang, Qin Chen, Megan K. La Peyre, Kelin Hu, Jerome F. La Peyre
Predicting The Impacts Of Mississippi River Diversions And Sea-Level Rise On Spatial Patterns Of Eastern Oyster Growth Rate And Production, Hongqing Wang, Qin Chen, Megan K. La Peyre, Kelin Hu, Jerome F. La Peyre
Faculty Publications
© 2017 There remains much debate regarding the perceived tradeoffs of using freshwater and sediment diversions for coastal restoration in terms of balancing the need for wetland restoration versus preserving eastern oyster (Crassostrea virginica) production. Further complicating the issue, climate change-induced sea-level rise (SLR) and land subsidence are also expected to affect estuarine water quality. In this study, we developed a process-based numerical modeling system that couples hydrodynamic, water quality, and oyster population dynamics. We selected Breton Sound Estuary (BSE) (∼2740 km2) in the eastern Mississippi River Deltaic Plain since it is home to several of the largest public oyster …
Spectre: A Task-Based Discontinuous Galerkin Code For Relativistic Astrophysics, Lawrence E. Kidder, Scott E. Field, Francois Foucart, Erik Schnetter, Saul A. Teukolsky, Andy Bohn, Nils Deppe, Peter Diener, François Hébert, Jonas Lippuner, Jonah Miller, Christian D. Ott, Mark A. Scheel, Trevor Vincent
Spectre: A Task-Based Discontinuous Galerkin Code For Relativistic Astrophysics, Lawrence E. Kidder, Scott E. Field, Francois Foucart, Erik Schnetter, Saul A. Teukolsky, Andy Bohn, Nils Deppe, Peter Diener, François Hébert, Jonas Lippuner, Jonah Miller, Christian D. Ott, Mark A. Scheel, Trevor Vincent
Faculty Publications
We introduce a new relativistic astrophysics code, SpECTRE, that combines a discontinuous Galerkin method with a task-based parallelism model. SpECTRE's goal is to achieve more accurate solutions for challenging relativistic astrophysics problems such as core-collapse supernovae and binary neutron star mergers. The robustness of the discontinuous Galerkin method allows for the use of high-resolution shock capturing methods in regions where (relativistic) shocks are found, while exploiting high-order accuracy in smooth regions. A task-based parallelism model allows efficient use of the largest supercomputers for problems with a heterogeneous workload over disparate spatial and temporal scales. We argue that the locality and …
A Comparison Of Grid-Based And Sph Binary Mass-Transfer And Merger Simulations, Patrick M. Motl, Juhan Frank, Jan Staff, Geoffrey C. Clayton, Christopher L. Fryer, Wesley Even, Steven Diehl, Joel E. Tohline
A Comparison Of Grid-Based And Sph Binary Mass-Transfer And Merger Simulations, Patrick M. Motl, Juhan Frank, Jan Staff, Geoffrey C. Clayton, Christopher L. Fryer, Wesley Even, Steven Diehl, Joel E. Tohline
Faculty Publications
There is currently a great amount of interest in the outcomes and astrophysical implications of mergers of double degenerate binaries. In a commonly adopted approximation, the components of such binaries are represented by polytropes with an index of n = 3/2. We present detailed comparisons of stellar mass-transfer and merger simulations of polytropic binaries that have been carried out using two very different numerical algorithms - a finite-volume "grid" code and a smoothed-particle hydrodynamics (SPH) code. We find that there is agreement in both the ultimate outcomes of the evolutions and the intermediate stages if the initial conditions for each …