Operator Splitting of the KdV-Burgers Type Equation with Fast and Slow Dynamics

2010-11-27
The Korteweg de Vries-Burgers (KdV-Burgers) type equation arising from the discretization of the viscous Burgers equation with fast dispersion and slow diffusion is solved using operator splitting. The dispersive and diffusive parts are discretized in space by second order conservative finite differences. The resulting system of ordinary differential equations are composed using the time reversible Strang splitting. The numerical results reveal that the periodicity of the solutions and the invariants of the KdV-Burgers equation are well preserved.

Suggestions

Intrusive and data-driven reduced order modelling of the rotating thermal shallow water equation
Yıldız, Süleyman; Karasözen, Bülent; Uzunca, Murat (2022-05-15)
In this paper, we investigate projection-based intrusive and data-driven model order reduction in numerical simulation of rotating thermal shallow water equation (RTSWE) in parametric and non-parametric form. Discretization of the RTSWE in space with centered finite differences leads to Hamiltonian system of ordinary differential equations with linear and quadratic terms. The full-order model (FOM) is obtained by applying linearly implicit Kahan's method in time. Applying proper orthogonal decomposition wit...
SECOND ORDER NUMERICAL METHODS FOR NAVIER-STOKES AND DARCY-BRINKMAN EQUATIONS
DEMİR, Medine; Kaya Merdan, Songül; Bayram Çıbık, Aytekin; Department of Mathematics (2022-6-28)
In this thesis, second-order, efficient and reliable numerical stabilization methods are considered for approximating solutions to the incompressible, viscous fluid flow driven by the Navier-Stokes equations and for the Darcy-Brinkman equations driven by double-diffusive convection. The standard Galerkin finite element method remains insufficient for accurately solving these complex nonlinear equations that creates some problems such as numerical instabilities and unphysical oscillations in the solution. A ...
Fast-Multipole-Method Solutions of New Potential Integral Equations
Gür, Uğur Meriç; Karaosmanoglu, Bariscan; Ergül, Özgür Salih (2017-09-27)
A recently introduced potential integral equations for stable analysis of low-frequency problems involving dense discretizations with respect to wavelength are solved by using the fast multipole method (FMM). Two different implementations of FMM based on multipoles and an approximate diagonalization employing scaled plane waves are developed and used for rigorous solutions of low-frequency problems. Numerical results on canonical problems demonstrate excellent stability and solution capabilities of both imp...
Generalized Hybrid Surface Integral Equations for Finite Periodic Perfectly Conducting Objects
Karaosmanoglu, Bariscan; Ergül, Özgür Salih (2017-01-01)
Hybrid formulations that are based on simultaneous applications of diversely weighted electric-field integral equation (EFIE) and magnetic-field integral equation (MFIE) on periodic but finite structures involving perfectly conducting surfaces are presented. Formulations are particularly designed for closed conductors by considering the unit cells of periodic structures as sample problems for optimizing EFIE and MFIE weights in selected regions. Three-region hybrid formulations, which are designed by geneti...
Modified Superformula Contours Optimized via Genetic Algorithms for Exponentially Converging 2D Solutions of MFIE
Guler, Sadri; Onol, Can; Ergül, Özgür Salih; Sever, Emrah; Dikmen, Fatih; Tuchkin, Yury A. (2017-05-25)
An infinitely smooth parametrical representation with derivatives of all orders is used, resulting into exponentially converging solutions of magnetic field integral equation (MFIE) in 2D either for TM or TE polarized excitations. A version of superformula modified for this purpose has been subject to optimization of its parameters via genetic algorithms to provide smooth parameterization for a desired boundary in two-dimensional problems. The organization of the MFIE kernel and convergence of the solution ...
Citation Formats
B. Karasözen, “Operator Splitting of the KdV-Burgers Type Equation with Fast and Slow Dynamics,” 2010, vol. 1309, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53691.