200 citations · 451 across the 13 of their papers we have counts for
15 papers
The contact mechanics challenge: Problem definition
Martin H. Müser, Wolf B. Dapp
We present a contact mechanics problem, which we consider to be representative for contacts between nominally flat surfaces. The main ingredients of the mathematically fully define…
Fluid leakage near the percolation threshold
Wolf B. Dapp, Martin H. Müser
Percolation is a concept widely used in many fields of research and refers to the propagation of substances through porous media (e.g., coffee filtering), or the behaviour of compl…
Contact mechanics of and Reynolds flow through saddle points: On the coalescence of contact patches and the leakage rate through near-critical constrictions
Wolf B. Dapp, Martin H. Müser
We study numerically local models for the mechanical contact between two solids with rough surfaces. When the solids softly touch either through adhesion or by a small normal load…
Systematic analysis of Persson's contact mechanics theory of randomly rough elastic surfaces
Wolf B. Dapp, Nikolay Prodanov, Martin H. Müser
We systematically check explicit and implicit assumptions of Persson's contact mechanics theory. It casts the evolution of the pressure distribution with increasing r…
On the contact area and mean gap of rough, elastic contacts: Dimensional analysis, numerical corrections and reference data
Nikolay Prodanov, Wolf B. Dapp, Martin H. Müser
The description of elastic, nonadhesive contacts between solids with self-affine surface roughness seems to necessitate knowledge of a large number of parameters. However, few para…
Towards time-dependent, non-equilibrium charge-transfer force fields: Contact electrification and history-dependent dissociation limits
Wolf B. Dapp, Martin H. Müser
Force fields uniquely assign interatomic forces for a given set of atomic coordinates. The underlying assumption is that electrons are in their quantum-mechanical ground state or i…
Self-Affine Elastic Contacts: Percolation and Leakage
Wolf B. Dapp, Andreas Lücke, Bo N. J. Persson +1
We study fluid flow at the interfaces between elastic solids with randomly rough, self-affine surfaces. We show by numerical simulation that elastic deformation lowers the relative…
Redox reactions with empirical potentials: Atomistic battery discharge simulations
Wolf B. Dapp, Martin H. Müser
Batteries are pivotal components in overcoming some of today's greatest technological challenges. Yet to date there is no self-consistent atomistic description of a complete batter…
Magnetic Fields and the Formation of Cores and Disks
Shantanu Basu, Nicole D. Bailey, Wolf B. Dapp
We review recent results of non-ideal magnetohydrodynamic models for the fragmentation of molecular clouds and the collapse of cloud cores to form protostar-disk systems. Thin-disk…
Magnetic Field Diffusion and the Formation of Circumstellar Disks
Shantanu Basu, Wolf B. Dapp, Matthew W. Kunz
A non-ideal MHD collapse calculation employing the axisymmetric thin-disk approximation is used to resolve cloud core collapse down to the scales of the second (stellar) core. Rota…
Magnetic Diffusion in Star Formation
Shantanu Basu, Wolf B. Dapp
Magnetic diffusion plays a vital role in star formation. We trace its influence from interstellar cloud scales down to star-disk scales. On both scales, we find that magnetic diffu…
Averting the magnetic braking catastrophe on small scales: disk formation due to Ohmic dissipation
Wolf B. Dapp, Shantanu Basu
We perform axisymmetric resistive MHD calculations that demonstrate that centrifugal disks can indeed form around Class 0 objects despite magnetic braking. We follow the evolution…
Long-lived Magnetic-Tension-Driven Modes in a Molecular Cloud
Shantanu Basu, Wolf B. Dapp
We calculate and analyze the longevity of magnetohydrodynamic (MHD) wave modes that occur in the plane of a magnetic thin sheet. Initial turbulent conditions applied to a magnetica…
An analytic column density profile to fit prestellar cores
Wolf B. Dapp, Shantanu Basu
We present a new analytical three-parameter formula to fit observed column density profiles of prestellar cores. It represents a line-of-sight integral through a spherically symmet…
Magnetically-Regulated Fragmentation Induced by Nonlinear Flows and Ambipolar Diffusion
Shantanu Basu, Glenn E. Ciolek, Wolf Dapp +1
We present a parameter study of simulations of fragmentation regulated by gravity, magnetic fields, ambipolar diffusion, and nonlinear flows. The thin-sheet approximation is employ…