Search for dissertations about: "moving mesh methods"

Showing result 1 - 5 of 13 swedish dissertations containing the words moving mesh methods.

2. 1. Finite Volume Methods on Quadrilateral and Moving Meshes

   Author : Fredrik Svensson; Matematik LTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; numerisk analys; system; kontroll; systems; control; numerical analysis; finite volume method; Datalogi; Computer science; moving mesh method; higher order reconstruction; hyperbolic conservation law;

   Abstract : The topic of this thesis is the study of finite volume methods for hyperbolic conservation laws on non-uniform meshes. A high-order hyperbolic reconstruction method is presented. The method is constructed for quadrilateral meshes, since more realistic hyperbolic problems involve more complicated problem domains than the standard rectangular ones. READ MORE

4. 2. Cut Finite Element Methods on Overlapping Meshes: Analysis and Applications

   Author : Carl Lundholm; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; parabolic problem; multi-objective optimization; multi-mesh; energy analysis; CutFEM; augmented reality; overlapping meshes; moving meshes;

   Abstract : This thesis deals with both analysis and applications of cut finite element methods (CutFEMs) on overlapping meshes. By overlapping meshes we mean a mesh hierarchy with a background mesh at the bottom and one or more overlapping meshes that are stacked on top of it. READ MORE

5. 3. Numerical Methods for Aerodynamic Shape Optimization

   Author : Olivier Amoignon; Martin Berggren; Per Lötstedt; Olivier Pironneau; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Computational Fluid Dynamics; shape optimization; adjoint equations; edge-based finite-volume method; moving mesh adaptation; radial basis functions; inviscid compressible flow; transition control; Numerical Analysis; Numerisk analys;

   Abstract : Gradient-based aerodynamic shape optimization, based on Computational Fluid Dynamics analysis of the flow, is a method that can automatically improve designs of aircraft components. The prospect is to reduce a cost function that reflects aerodynamic performances. READ MORE

6. 4. Weld Pool Simulations

   Author : Marcus Edstorp; Högskolan Väst; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Arc Welding; Weld Pool; Multiphysics Simulations; Moving Boundaries; Free Surfaces; Mesh Motion; Two-Phase Flow; Incompressible Flow; Electromagnetics; Finite Element Methods; Applied mathematics; Tillämpad matematik; Manufacturing engineering; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik; Arc Welding; Weld Pool; Multiphysics Simulations; Moving Boundaries; Free Surfaces; Mesh Motion; Two-Phase Flow; Incompressible Flow; Electromagnetics; Finite Element Methods;

   Abstract : This investigation is devoted to the study of welding and its effect on the workpiece, focusing on the thermo and fluid dynamical phenomena occuring during a autogenous or nonautogenous arc fusion welding process. Its aim is to simulate the behaviour of the weld pool and analyze the consequence of the solid-liquid phase change, thus obtaining a methodology for predicting the appearance of weld defects related to solidification and cooling. READ MORE

7. 5. Grey-box Identification of Distributed Parameter Systems

   Author : Yi Liu; Elling W. Jacobsen; Denis Dochain; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; grey-box modeling; grey-box identification; model reduction; PDE; chromatography; bifurcation; moving mesh methods; orthogonal collocation on moving finite elements; OCMFE; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Abstract : This thesis considers the problem of making dynamic models for industrial processes by combining physical modelling with experimental data. The focus is on distributed parameter systems, that is, systems for which the model structure involves partial differential equations (PDE). Distributed parameter systems are important in many applications, e. READ MORE