Sökning: "mean curvature"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden mean curvature.

  1. 1. On one approximation scheme for generalised mean curvature flow

    Författare :Richards Grzhibovskis; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; convolution-tresholding scheme; viscosity solution; level-set equation; curvature flow; kinetic modeling; curvature flow;

    Sammanfattning : .... LÄS MER

  3. 2. Mean value surfaces with prescribed curvature form

    Författare :Yolanda Perdomo-Gallipoli; Matematik (naturvetenskapliga fakulteten); []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Licentiate theses i mathematical scíences.... LÄS MER

  4. 3. Finite element methods for surface problems

    Författare :Mirza Cenanovic; Peter Hansbo; Kent Salomonsson; Paul Houston; Jönköping University; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; trace finite element method; membrane; mean curvature; level-set method;

    Sammanfattning : The purpose of this thesis is to further develop numerical methods for solving surface problems by utilizing tangential calculus and the trace finite element method. Direct computation on the surface is possible by the use of tangential calculus, in contrast to the classical approach of mapping 2D parametric surfaces to 3D surfaces by means of differential geometry operators. LÄS MER

  5. 4. Development and analysis of turbulence models for flows with strong curvature and rotation

    Författare :Olof Grundestam; KTH; []
    Nyckelord :Turbulence model; nonlinear modelling; streamline curvature; high-lift aerodynamics;

    Sammanfattning : An explicit algebraic Reynolds stress model (EARSM) based ona pressure strain rate model including terms tensoriallynonlinear in the mean velocity gradients is developed in orderto improve predictions for .ows with strong curvature and/orrotation. LÄS MER

  7. 5. Electrostatic Interactions in Complex Liquids : A Thermodynamic Analysis Based on the Poisson-Boltzmann Equation and the Flexible Surface Model

    Författare :Ingemar Carlsson; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AOT; AerosolOT; ionic surfactant; spontaneous curvature; bending modulus; bending energy; Helfrich curvature energy; fluid membrane; complex liquid; flexible surface model; micelle; counterion; Poisson-Boltzmann equation; cell model; L3 phase; sponge phas; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : The aim of this study was to analyse physico-chemical properties of some complex liquids using the Poisson-Boltzmann (PB) cell model; to extend the theory to cover bilayer systems with complex global geometry; finally to apply this new extended model to such bilayer systems. The PB cell model provides a practical tool to examine counterion association and phase behaviour for structures of simple geometries; cylindrical and spherical. LÄS MER