22 citations · 47 across the 7 of their papers we have counts for
7 papers
Towards indirect assessment of surface anomalies on wind turbine rotor blades
Daniel Feldmann, Felix Oehme, Lennart von Germersheim +3
We present results from novel field, lab and computer studies, that pave the way towards non-invasive classification of localised surface defects on running wind turbine rotors usi…
Routes to turbulence in Taylor-Couette flow
Daniel Feldmann, Daniel Borrero-Echeverry, Michael J. Burin +2
Fluid flows between rotating concentric cylinders exhibit two distinct routes to turbulence. In flows dominated by inner-cylinder rotation, a sequence of linear instabilities leads…
Taylor rolls on tour: Slow drift of turbulent large-scale structures in flows with continuous symmetries
Daniel Feldmann, Marc Avila
In Rayleigh-Benard convection and Taylor-Couette flow cellular patterns emerge at the onset of instability and persist as large-scale coherent structures in the turbulent regime. T…
Effect of filter kernel on scale-energetics of near-wall turbulent structures
Daniel Feldmann, Mohammad Umair, Marc Avila +1
Inter-scale energy fluxes, , are widely used as a diagnostic tool to analyse energy transfer across length scales, , in turbulence data. Here, we investigate how the choice…
Turbulent kinetic energy transport in oscillatory pipe flow
Claus Wagner, Daniel Feldmann
Laminar as well as turbulent oscillatory pipe flows occur in many fields of biomedical science and engineering. Pulmonary air flow and vascular blood flow are usually laminar, beca…
On phase asymmetries in oscillatory pipe flow
Daniel Feldmann, Claus Wagner
We present results from direct numerical simulations (DNS) of oscillatory pipe flow at several dimensionless frequencies Wo = {6.5, 13, 26} and one fixed shear Reynolds number Re_τ…