Essays about: "initial boundary value problems"

Found 3 essays containing the words initial boundary value problems.

  1. 1. Stability and accuracy for difference methods using asynchronous processors

    University essay from Linköpings universitet/Matematiska institutionen; Linköpings universitet/Tekniska fakulteten

    Author : Albin Göransson; [2018]
    Keywords : asynchronous problems; partial diffrence equations; initial boundary value problems; parallel computing;

    Abstract : We solve initial boundary value problems with information unavailable at random time-steps. The randomly unavailable information represents asynchrony between processing elements. To approximate the initial boundary value problem, finite difference operators with summation-by-parts proper-ties and weak boundary procedures are used. READ MORE

  3. 2. An Attempt Towards FE-Modelling of Fracture Propagation in Railway Wheels

    University essay from KTH/Spårfordon

    Author : Fred Öhnander; [2018]
    Keywords : Railway wheel; Wheel-rail contact; Wear; Fracture initiation; Physical fracture propagation model; FE-model; Fracture mechanics; XFEM; Inclusion; Järnvägshjul; Hjul-räl-kontakt; Slitage; Sprickinitiering; Fysisk sprickbildningsmodell; FE-modell; Frakturmekanik; XFEM; Imperfektion;

    Abstract : The demand for higher velocities and heavier axle loads for freight trains leads to higher forces on the railway wheels which in turn lead to an increase in stresses on and below the surface of the wheel-rail contact. By time, this induces wear on the wheels which consequently lead to higher maintenance costs and in some cases accidents. READ MORE

  4. 3. Numerical Analysis of Burgers' Equation with Uncertain Boundary Conditions using the Stochastic Galerkin Method

    University essay from Institutionen för informationsteknologi

    Author : Per Pettersson; [2008]
    Keywords : ;

    Abstract : Burgers' equation with stochastic initial and boundary conditions is investigated by a polynomial chaos expansion approach where the solution is represented as a series of stochastic, orthogonal polynomials. The analysis of wellposedness for the stochastic Burgers' equation follows the pattern of that of the deterministic Burgers' equation. READ MORE