Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Burstedde, Carsten"'
We describe a fast, direct solver for elliptic partial differential equations on a two-dimensional hierarchy of adaptively refined, Cartesian meshes. Our solver, inspired by the Hierarchical Poincar\'e-Steklov (HPS) method introduced by Gillman and M
Externí odkaz:
http://arxiv.org/abs/2402.14936
Autor:
Kirilin, Mikhail, Burstedde, Carsten
We present a technical enhancement within the p4est software for parallel adaptive mesh refinement. In p4est primitives are stored as octants in three and quadrants in two dimensions. While, classically, they are encoded by the native approach using
Externí odkaz:
http://arxiv.org/abs/2308.13615
Autor:
Griesbach, Tim, Burstedde, Carsten
We specify a file-oriented data format suitable for parallel, partition-independent disk I/O. Here, a partition refers to a disjoint and ordered distribution of the data elements between one or more processes. The format is designed such that the fil
Externí odkaz:
http://arxiv.org/abs/2307.06789
We discuss parallel algorithms to gather topological information about off-process mesh neighbor elements. This information is commonly called the ghost layer, whose creation is a fundamental, necessary task in executing most parallel, element-based
Externí odkaz:
http://arxiv.org/abs/1910.10641
We investigate various block preconditioners for a low-order Raviart-Thomas discretization of the mixed Poisson problem on adaptive quadrilateral meshes. In addition to standard diagonal and Schur complement preconditioners, we present a dedicated AM
Externí odkaz:
http://arxiv.org/abs/1901.05830
Autor:
Burstedde, Carsten
We present an MPI-parallel algorithm for the in-situ visualization of computational data that is built around a distributed linear forest-of-octrees data structure. Such octrees are frequently used in element-based numerical simulations; they store t
Externí odkaz:
http://arxiv.org/abs/1809.01334
Autor:
Burstedde, Carsten
We introduce several parallel algorithms operating on a distributed forest of adaptive quadtrees/octrees. They are targeted at large-scale applications relying on data layouts that are more complex than required for standard finite elements, such as
Externí odkaz:
http://arxiv.org/abs/1803.08432
Autor:
Calhoun, Donna, Burstedde, Carsten
We describe a parallel, adaptive, multi-block algorithm for explicit integration of time dependent partial differential equations on two-dimensional Cartesian grids. The grid layout we consider consists of a nested hierarchy of fixed size, non-overla
Externí odkaz:
http://arxiv.org/abs/1703.03116
Publikováno v:
Computational Geosciences 2017
Regional hydrology studies are often supported by high resolution simulations of subsurface flow that require expensive and extensive computations. Efficient usage of the latest high performance parallel computing systems becomes a necessity. The sim
Externí odkaz:
http://arxiv.org/abs/1702.06898
Autor:
Burstedde, Carsten, Holke, Johannes
In tree based adaptive mesh refinement, elements are partitioned between processes using a space filling curve. The curve establishes an ordering between all elements that derive from the same root element, the tree. When representing more complex ge
Externí odkaz:
http://arxiv.org/abs/1611.02929