A test suite for quantitative comparison of hydrodynamics codes in astrophysics Export

@article{citeulike:3116367, abstract = {We test four commonly used astrophysical simulation codes; Enzo, Flash, Gadget and Hydra, using a suite of numerical problems with analytic initial and final states. Situations similar to the conditions of these tests, a Sod shock, a Sedov blast and both a static and translating King sphere occur commonly in astrophysics, where the accurate treatment of shocks, sound waves, supernovae explosions and collapsed haloes is a key condition for obtaining reliable validated simulations. We demonstrate that comparable results can be obtained for Lagrangian and Eulerian codes by requiring that approximately one particle exists per grid cell in the region of interest. We conclude that adaptive Eulerian codes, with their ability to place refinements in regions of rapidly changing density, are well suited to problems where physical processes are related to such changes. Lagrangian methods, on the other hand, are well suited to problems where large density contrasts occur and the physics is related to the local density itself rather than the local density gradient.}, archivePrefix = {arXiv}, author = {Tasker, Elizabeth J. and Brunino, Riccardo and Mitchell, Nigel L. and Michielsen, Dolf and Hopton, Stephen and Pearce, Frazer R. and Bryan, Greg L. and Theuns, Tom}, citeulike-article-id = {3116367}, citeulike-linkout-0 = {http://arxiv.org/abs/0808.1844}, citeulike-linkout-1 = {http://arxiv.org/pdf/0808.1844}, day = {13}, eprint = {0808.1844}, keywords = {code, computational, hydrodynamic, mesh, model}, month = {Aug}, posted-at = {2008-08-15 09:50:52}, priority = {2}, title = {A test suite for quantitative comparison of hydrodynamics codes in astrophysics}, url = {http://arxiv.org/abs/0808.1844}, year = {2008} }

TY - JOUR ID - citeulike:3116367 L3 - citeulike-article-id:3116367 N2 - We test four commonly used astrophysical simulation codes; Enzo, Flash, Gadget and Hydra, using a suite of numerical problems with analytic initial and final states. Situations similar to the conditions of these tests, a Sod shock, a Sedov blast and both a static and translating King sphere occur commonly in astrophysics, where the accurate treatment of shocks, sound waves, supernovae explosions and collapsed haloes is a key condition for obtaining reliable validated simulations. We demonstrate that comparable results can be obtained for Lagrangian and Eulerian codes by requiring that approximately one particle exists per grid cell in the region of interest. We conclude that adaptive Eulerian codes, with their ability to place refinements in regions of rapidly changing density, are well suited to problems where physical processes are related to such changes. Lagrangian methods, on the other hand, are well suited to problems where large density contrasts occur and the physics is related to the local density itself rather than the local density gradient. TI - A test suite for quantitative comparison of hydrodynamics codes in astrophysics KW - code KW - computational KW - hydrodynamic KW - mesh KW - model AU - Tasker, Elizabeth AU - Brunino, Riccardo AU - Mitchell, Nigel AU - Michielsen, Dolf AU - Hopton, Stephen AU - Pearce, Frazer AU - Bryan, Greg AU - Theuns, Tom PY - 2008/Aug/13/ UR - http://arxiv.org/abs/0808.1844 ER -