58 citations · 239 across the 11 of their papers we have counts for
11 papers
A collision model for DNS with ellipsoidal particles in viscous fluid
Ramandeep Jain, Silvio Tschisgale, Jochen Fröhlich
The article proposes an algorithm to model the collision between arbitrary ellipsoids in viscous fluid. It is composed of several steps, each improving upon the standard procedure…
Scale-dependent anisotropy, energy transfer and intermittency in bubble-laden turbulent flows
Tian Ma, Bernhard Ott, Jochen Frohlich +1
Data from Direct Numerical Simulations of disperse bubbly flows in a vertical channel are used to study the effect of the bubbles on the carrier-phase turbulence. A new method is d…
An immersed boundary method for the fluid-structure interaction of slender flexible structures in viscous fluid
S. Tschisgale, J. Fröhlich
This paper presents a numerical method for the simulation of fluid-structure interaction specifically tailored to interactions between Newtonian fluids and a large number of slende…
Linearizing the hybridizable discontinuous Galerkin method: A linearly scaling operator
Immo Huismann, Jörg Stiller, Jochen Fröhlich
This paper proposes a matrix-free residual evaluation technique for the hybridizable discontinuous Galerkin method requiring a number of operations scaling only linearly with the n…
Analysis of the Near-Wall Flow in a Turbine Cascade by Splat Visualization
Baldwin Nsonga, Gerik Scheuermann, Stefan Gumhold +3
Turbines are essential components of jet planes and power plants. Therefore, their efficiency and service life are of central engineering interest. In the case of jet planes or the…
Scaling to the stars -- a linearly scaling elliptic solver for -multigrid
Immo Huismann, Jörg Stiller, Jochen Fröhlich
High-order methods gain increased attention in computational fluid dynamics. However, due to the time step restrictions arising from the semi-implicit time stepping for the incompr…
Beam model for the elastic properties of material with spherical voids
Sascha Heitkam, Wiebke Drenckhan, Denis Weaire +1
The elastic properties of a material with spherical voids of equal volume are analysed using a new model, with particular attention paid to the hexagonal close-packed and the face-…
Elastic properties of solid material with various arrangements of spherical voids
Sascha Heitkam, Wiebke Drenckhan, Thomas Titscher +5
In this work the linear elastic properties of materials containing spherical voids are calculated and compared using finite element simulations. The focus is on homogeneous solid m…
Factorizing the factorization - a spectral-element solver for elliptic equations with linear operation count
Immo Huismann, Jörg Stiller, Jochen Fröhlich
High-order methods gain more and more attention in computational fluid dynamics. However, the potential advantage of these methods depends critically on the availability of efficie…
Efficient modelling of particle collisions using a non-linear viscoelastic contact force
Shouryya Ray, Tobias Kempe, Jochen Fröhlich
In this paper the normal collision of spherical particles is investigated. The particle interaction is modelled in a macroscopic way using the Hertzian contact force with additiona…
An analytic solution to the equations governing the motion of a point mass with quadratic resistance and generalizations
Shouryya Ray, Jochen Fröhlich
The paper is devoted to the motion of a body in a fluid under the influence of gravity and drag. Depending on the regime considered, the drag force can exhibit a linear, quadratic…