2 citations · 4 across the 10 of their papers we have counts for
11 papers
A new time-stepping strategy and boundary treatment to improve recent 2d traffic model
Friedemann Kemm
We show how a recently published 2d model for traffic flow can be further improved. Besides other improvements and simplifications, we present not only a method to compute the nece…
A short note on the stability of a class of parallel Runge-Kutta methods
Friedemann Kemm
With this short note, we close a gap in the linear stability theory of block predictor-corrector Runge-Kutta schemes originally proposed for the parallel solution of ODEs.
New options for explicit all Mach number schemes by suitable choice of time integration methods
Friedemann Kemm
Many low-Mach or all-Mach number codes are based on space discretizations which in combination with the first order explicit Euler method as time integration would lead to an unsta…
Why Majority Judgement is not yet the solution for political elections, but can help finding it
Friedemann Kemm
Like many other voting systems, Majority Judgement suffers from the weaknesses of the underlying mathematical model: Elections as problem of choice or ranking. We show how the mode…
Numerical investigation of Mach number consistent Roe solvers for the Euler equations of gas dynamics
Friedemann Kemm
While traditional approaches to prevent the carbuncle phenomenon in gas dynamics simulations increase the viscosity on entropy and shear waves near shocks, it was quite recently su…
A simple diffuse interface approach for compressible flows around moving solids of arbitrary shape based on a reduced Baer-Nunziato model
Friedemann Kemm, Elena Gaburro, Ferdinand Thein +1
In this paper we propose a new diffuse interface model for the numerical simulation of inviscid compressible flows around fixed and moving solid bodies of arbitrary shape. The soli…
A Numerical Study of Newton Interpolation with Extremely High Degrees
Michael Breuß, Friedemann Kemm, Oliver Vogel
In current textbooks the use of Chebyshev nodes with Newton interpolation is advocated as the most efficient numerical interpolation method in terms of approximation accuracy and c…
Heuristical and numerical considerations for the carbuncle phenomenon
Friedemann Kemm
In this study, we investigate the so called carbuncle phenomenon by means of numerical experiments and heuristic considerations. We identify two main sources for the carbuncle: ins…
Roe-type schemes for shallow water magnetohydrodynamics with hyperbolic divergence cleaning
Friedemann Kemm
We discuss Roe-type linearizations for non-conservative shallow water magnetohydrodynamics without and with hyperbolic divergence cleaning.
On the Proper Setup of the Double Mach Reflection as a Test Case for the Resolution of Gas Dynamics Codes
Friedemann Kemm
This note discusses the initial and boundary conditions as well as the size of the computational domain for the double Mach reflection problem when set up as a test for the resolut…
A note on the carbuncle in shallow water simulations
Friedemann Kemm
An important problem in gas dynamics simulation is to prevent the carbuncle, a breakdown of discrete shock profiles. We show that for high Froude number, this also occurs in shallo…