## UTBEST3D

 swMATH ID: 24815 Software Authors: Reuter, Balthasar; Aizinger, Vadym; Köstler, Harald Description: A multi-platform scaling study for an openmp parallelization of a discontinuous Galerkin ocean model. We present a cross-platform scaling investigation for an OpenMP parallelization of UTBEST3D – a coastal and regional ocean code based on the discontinuous Galerkin finite element method. The study is conducted for a real life application on an unstructured computational mesh of the Northwest Atlantic with realistic topography and well resolved coast line on a broad selection of current computing platforms. Four numerical setups of increasing physical and computational complexity are used for comparison: barotropic with no vertical eddy viscosity, barotropic with an algebraic eddy viscosity parametrization, baroclinic with an algebraic eddy viscosity, and baroclinic with $$k$$-$$varepsilon$$ vertical turbulence closure. In addition to Intel Xeon and IBM Power6/PowerPC architectures, we also include Intel’s new MIC processor Xeon Phi in the evaluation. Good scalability is found across all platforms with Intel Xeon CPUs producing the best runtime results and Xeon Phi demonstrating the best parallel efficiency. Homepage: https://www.sciencedirect.com/science/article/pii/S0045793015001759 Keywords: discontinuous Galerkin finite element method; 3D shallow water equations; OpenMP; Intel Xeon Phi; IBM PowerPC; IBM Power6 Related Software: ADCIRC; GitHub; TELEMAC; FESTUNG; Matlab; POP; HYCOM; CUDA; XTROEM-FV; WIGEON; CMPGRD; LS-VISM Cited in: 4 Publications
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### Cited by 10 Authors

 3 Aizinger, Vadym 2 Köstler, Harald 1 Frank, Florian 1 Grosso, Roberto D. 1 Hajduk, Hennes 1 Hauck, Moritz 1 Reuter, Balthasar 1 Rupp, Andreas 1 Shu, Chi-Wang 1 Zint, Daniel

### Cited in 4 Serials

 1 Computers and Fluids 1 Journal of Computational Physics 1 Computational Mathematics and Mathematical Physics 1 GEM - International Journal on Geomathematics

### Cited in 4 Fields

 4 Numerical analysis (65-XX) 3 Fluid mechanics (76-XX) 3 Geophysics (86-XX) 1 Partial differential equations (35-XX)