Sökning: "mesh smoothing"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden mesh smoothing.

  1. 1. Finite Element Procedures for Fluid-structure Interaction

    Författare :Joakim Hermansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nitsche s method; stabilized Crouzeix-Raviart; Winslow s method; Raviart-Thomas; space-time FE; stretched elements; FSI; FEM; weak coupling; mesh smoothing; acoustic FSI; ALE;

    Sammanfattning : This thesis concerns finite element (FE) methods for solving fluid-structure interaction (FSI) problems. Two types of fluid-structure interaction are considered. A finite element method for solving the interaction between a flowing incompressible fluid and a linear elastic structure is proposed. The flow is assumed to be laminar. LÄS MER

  3. 2. Smoothing and adaptive remeshing schemes for graded element

    Författare :Seokjeong Hyun; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Sammanfattning : The objective of the present work is to develop mesh smoothing and adaptive remeshing schemes to improve the Finite Element Analysis. Smoothing and adaptive remeshing techniques are studied for graded element. Different smoothing techniques are implemented and shown. LÄS MER

  4. 3. On the Arbitrary Lagrangian-Eulerian Finite Element Method

    Författare :Lars Olovsson; Kenneth Runesson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; large deformation plasticity; FEM; ALE; multi-material Euler; machining simulations;

    Sammanfattning : This thesis has been devoted to the study and development of algorithms for Finite Element (FE) simulations of mechanical processes involving large deformations. Aspects of three different formulations have been considered:(i) The single material Arbitrary Lagrangian-Eulerian (ALE) formulation is a method where the FE mesh is allowed to move independently to the material flow. LÄS MER

  5. 4. Adaptive remeshing and simulating a chain of manufacturing process

    Författare :Seokjeong Hyun; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Sammanfattning : Simulations of manufacturing process do in general need adaptive meshing techniques. These can not only make it possible to obtain the solution more efficient but they can also be necessary to enable a solution to be obtained at all. The latter is the case for processes like forging where very large deformations occur. LÄS MER

  7. 5. Development of shape optimization for internal flows

    Författare :EYSTEINN HELGASON; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; internal flow; computational fluid dynamics; sensitivities; continuous adjoint method.; optimization;

    Sammanfattning : This thesis describes the development of an adjoint based optimizationmethod.The goal is to develop a robust method capable of handling multipledesign variables, whereastraditional methods have shown to be too costly for many design parameters.The main application is for internal flow geometries within theautomotive industry. LÄS MER