Essays about: "Schur complement"

Found 3 essays containing the words Schur complement.

  1. 1. A predictor corrector method for a Finite ElementMethod for the variable density Navier-Stokes equations

    University essay from KTH/Numerisk analys, NA

    Author : Isabel Haasler; [2017]
    Keywords : ;

    Abstract : Constructing Finite Element Methods for the incompressible Navier-Stokes equations that are computationally feasible requires the use of pressure segregation methods such as the predictor corrector scheme. From an algebraic point of view these methods correspond to a preconditioned Richardson iteration on the pressure Schur complement. READ MORE

  3. 2. A comparison of two multilevel Schur preconditioners for adaptive FEM

    University essay from Avdelningen för beräkningsvetenskap

    Author : Christian Karlsson; [2014]
    Keywords : computational science; PDE; partial differential equations; FEM; finite element method; adaptive mesh refinement; Schur complement; multilevel method; iterative method; conjugate gradient method; beräkningsvetenskap; PDE; partiella differentialekvationer; FEM; finita elementmetoden; adaptivt beräkningsnät; adaptiv mesh; Schurkomplement; multilevelmetod; iterativ metod; konjugerade gradientmetoden;

    Abstract : There are several algorithms for solving the linear system of equations that arise from the finite element method with linear or near-linear computational complexity. One way is to find an approximation of the stiffness matrix that is such that it can be used in a preconditioned conjugate residual method, that is, a preconditioner to the stiffness matrix. READ MORE

  4. 3. Numerical methods for glacial isostatic adjustment  models

    University essay from Institutionen för informationsteknologi

    Author : Juan Carlos Araujo-Cabarcas; [2013]
    Keywords : ;

    Abstract : Nordic countries experience post-glacial rebound, a movement where geographical contours slowly change elevation with respect to the mean sea level. The glacial isostatic adjustment (GIA) model aims to explain the phenomena, which combined with seismic data allows geoscientists to reconstruct elastic coefficients and viscosities of the Earth's lithosphere and upper mantle. READ MORE