Sökning: "Time adaptivity"

Visar resultat 6 - 10 av 52 avhandlingar innehållade orden Time adaptivity.

1. 6. Robust and Efficient Cell-Based Models of Tissue Mechanics

   Författare :Sonja Mathias; Andreas Hellander; Ruth Baker; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cell-based model; numerical methods; time integration; adaptivity; GPU acceleration; cell mechanics; embryonic development; cartilage formation; Beräkningsvetenskap; Scientific Computing;

   Sammanfattning : Cell-based models of tissue mechanics have become an important tool in cancer research and developmental biology. Complementary to wet-lab experiments, they allow for cost-efficient in-silico evaluation of mechanisms not easily probed in the lab. LÄS MER

3. 7. Adaptive Finite Element Procedures in Structural Dynamics

   Författare :Xiangdong Li; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element; h-adaptivity; Newmark method; structural dynamics; space-time; a posteriori; superconvergent patch recovery; postprocessing; automatic time-stepping; semidiscretization; error estimation; discontinuous Galerkin;

   Sammanfattning : This thesis deals with a posteriori error estimation and adaptivity in finite element procedures for the analysis of structural dynamic problems. First, error estimation and adaptivity for the Newmark time integration method are studied. LÄS MER

4. 8. Goal-Oriented Adaptive Finite Element Analysis in Computational Material Mechanics

   Författare :Fredrik Larsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; visco-plasticity; a posteriori error estimation; thermo-elasticity; mesh refinement; adaptivity; FEM; elasticity;

   Sammanfattning : This thesis is concerned with error control in computational material mechanics. A posteriori error estimation and adaptivity for finite element discretizations is investigated. Based on the technique of solving a dual problem, it is possible to control the accuracy of arbitrary quantities. LÄS MER

5. 9. Construction of Adaptive Multistep Methods for Problems with Discontinuities, Invariants, and Constraints

   Författare :Fatemeh Mohammadi; Numerisk analys; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; multistep methods; Initialization; beta-blocking; Discontinuity; Time adaptivity; Strong stability preserving; Differential algebraic equations;

   Sammanfattning : Adaptive multistep methods have been widely used to solve initial value problems. These ordinary differential equations (ODEs) may arise from semi-discretization of time-dependent partial differential equations(PDEs) or may combine with some algebraic equations to represent a differential algebraic equations (DAEs). LÄS MER

7. 10. A parallel block-based PDE solver with space-time adaptivity

   Författare :Stefan Söderberg; Per Lötstedt; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Numerical Analysis; Numerisk analys;

   Sammanfattning : A second order space and time adaptive method for parallel solution of hyperbolic PDEs on structured grids is presented. The grid is adapted to the underlying solution by successive refinement in blocks. Therefore, there may be jumps in the cell size at the block faces. LÄS MER