Scalable models of microwave system responses using sequential sampling on unstructured grids

Scalable Macromodeling of Microwave Systems Responses using Sequential Sampling with Path-Simplexes

Introduction: Efficient design of electromagnetic (EM) systems often requires expensive simulations using EM solvers which normally provide high accuracy at a significant cost in terms of memory storage and computing time. Alternatively, scalable macromodels can be used, which approximate the complex behavior of EM systems, characterized by frequency and additional design parameters, such as ge...

Transonic Turbulent Flow Computations on Unstructured Triangular Grids

Convexification of Unstructured Grids

Unstructured tetrahedral grids are a common data representation of three-dimensional scalar fields. For convex unstructured meshes efficient rendering methods are known. For concave or cyclic meshes, however, a significant overhead is required to sort the grid cells in back to front order. In this paper we apply methods known from computational geometry to transform concave into convex grids. W...

Diffusion on unstructured triangular grids using Lattice Boltzmann

In this paper, we present a Lattice Boltzmann scheme for diffusion on unstructured triangular grids. In this formulation there is no need for interpolation, as is required in other LB schemes on irregular grids. At the end of the propagation step, the lattice gas particles arrive exactly at neighbouring lattice sites, as is the case in LB schemes on Bravais lattices. The scheme is constructed u...

Maxwell Equations on Unstructured Grids Using Finite-Integration Methods

It is announced that the Maxwell equations can be solved on unstructured grids using finite integration methods. Numerical experiments show that next to the finite-volume method, a discretization technique can be defined based on ’finite-surface’ integration.