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16 papers · 2 filters
Simplex Space-Time Meshes in Compressible Flow Simulations
Max von Danwitz, Violeta Karyofylli, Norbert Hosters +1
Employing simplex space-time meshes enlarges the scope of compressible flow simulations. The simultaneous discretization of space and time with simplex elements extends the flexibi…
Fluid-structure interaction with NURBS-based coupling
Norbert Hosters, Jan Helmig, Atanas Stavrev +2
Engineering design via CAD software relies on Non-Uniform Rational B-Splines (NURBS) as a means for representing and communicating geometry. Therefore, in general, a NURBS descript…
A least-squares functional for joint exit wave reconstruction and image registration
Christian Doberstein, Benjamin Berkels
Images generated by a transmission electron microscope (TEM) are blurred by aberrations from the objective lens and can be difficult to interpret correctly. One possible solution t…
Optimal definition of the nonlinear weights in multidimensional Central WENOZ reconstructions
Isabella Cravero, Matteo Semplice, Giuseppe Visconti
Central WENO reconstruction procedures have shown very good performances in finite volume and finite difference schemes for hyperbolic conservation and balance laws in one and more…
A Structured Approach to the Construction of Stable Linear Lattice-Boltzmann Collision Operators
Philipp Otte, Martin Frank
We introduce a structured approach to the construction of linear BGK-type collision operators ensuring that the resulting Lattice-Boltzmann methods are stable with respect to a wei…
Kinetic Methods for Inverse Problems
Michael Herty, Giuseppe Visconti
The Ensemble Kalman Filter method can be used as an iterative numerical scheme for parameter identification or nonlinear filtering problems. We study the limit of infinitely large…