508 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sapienza University of RomeIT203 papers
- Centre National de la Recherche ScientifiqueFR156 papers
- Deutsches Elektronen-Synchrotron DESYDE152 papers
- European Organization for Nuclear ResearchCH147 papers
- Universität HamburgDE147 papers
- Princeton UniversityUS145 papers
- RWTH Aachen UniversityDE144 papers
- Eötvös Loránd UniversityHU143 papers
- Rutgers, The State University of New JerseyUS143 papers
- Tata Institute of Fundamental ResearchIN143 papers
- University of California San DiegoUS143 papers
- University of Wisconsin–MadisonUS143 papers
23 papers · 1 filter
Numerical Simulation of Turbulent Concentric Annular Pipe Flow using One-Dimensional Turbulence (ODT): Part 1: Momentum Transfer
Pei-Yun Tsai, Marten Klein, Heiko Schmidt
Turbulent concentric coaxial (annular) pipe flow is numerically investigated using a stochastic one-dimensional turbulence (ODT) model as a stand-alone tool. The dimensionally redu…
Stochastic modeling and large-eddy simulation of heated concentric coaxial pipe flow
Marten Klein, Pei-Yun Tsai, Heiko Schmidt
Turbulent concentric coaxial pipe flows are numerically investigated as canonical problem addressing spanwise curvature effects on heat and momentum transfer that are encountered i…
Interplay between geostrophic vortices and inertial waves in precession-driven turbulence
F. Pizzi, G. Mamatsashvili, A. J. Barker +2
The properties of rotating turbulence driven by precession are studied using direct numerical simulations and analysis of the underlying dynamical processes in Fourier space. The s…
The effect of nutation angle on the flow inside a precessing cylinder and its dynamo action
V. Kumar, F. Pizzi, A. Giesecke +4
The effect of the nutation angle on the flow inside a precessing cylinder is experimentally explored and compared with numerical simulations. The focus is laid on the typical break…
Localized layers of turbulence in stratified horizontally sheared Poiseuille flow
Joris Labarbe, Patrice Le Gal, Uwe Harlander +2
This article presents a numerical analysis of the instability developing in horizontally sheared Poiseuille flow, when stratification extends along the vertical direction. Our stud…
Stochastic modeling of surface scalar-flux fluctuations in turbulent channel flow using one-dimensional turbulence
Marten Klein, Heiko Schmidt, David O. Lignell
Accurate and economical modeling of near-surface transport processes is a standing challenge for various engineering and atmospheric boundary-layer flows. In this paper, we address…
Equilibrium shapes and floatability of static and vertically vibrated heavy liquid drops on the surface of a lighter fluid
Andrey Pototsky, Alexander Oron, Michael Bestehorn
A small drop of a heavier fluid may float on the surface of a lighter fluid supported by surface tension forces. In equilibrium, the drop assumes a radially symmetric shape with a…
Effect of geometric parameters on the noise generated by rod-airfoil configuration
Sparsh Sharma, Thomas F. Geyer, Jens Giesler
This paper investigates the effect of the geometric parameters -- rod diameter and the distance between the rod and the airfoil -- on the noise generated by rod-airfoil configurati…
Effect of different geometries of self-oscillating trailing-edge flaplets on aerofoil self-noise
E. Talboys, T. F. Geyer, F. Pruefer +1
This paper presents an acoustic study of a standard NACA 0012 aerofoil with additional self-oscillating passive flaplets attached to the trailing edge. The tests with varying geome…
Experiments and long-term High Performance Computations on amplitude modulations of strato-rotational flows
G. Meletti, S. Abide, S. Viazzo +2
The present paper describes a combined experimental and high performance computing study of new specific behaviors of the Strato-Rotational Instability (SRI). The confrontation of…
Statistics, plumes and azimuthally traveling waves in ultimate Taylor-Couette turbulent vortices
Andreas Froitzheim, Rodrigo Ezeta, Sander G. Huisman +4
In this paper, we experimentally study the influence of large-scale Taylor rolls on the small-scale statistics and the flow organization in fully turbulent Taylor-Couette flow {for…
Small-scale resolving simulations of the turbulent mixing in confined planar jets using one-dimensional turbulence
Marten Klein, Christian Zenker, Heiko Schmidt
Small-scale effects of turbulent mixing are numerically investigated by applying the map-based, stochastic, one-dimensional turbulence (ODT) model to confined planar jets. The mode…
One-Dimensional Flow Spectra and Cumulative Energy from Two Pipe Facilities
E. -S. Zanoun, Emir Öngüner, C. Egbers +2
Experiments have been conducted to assess the sizes and energy fractions of structure in fully developed turbulent pipe flow regime in two pipe facilities, ColaPipe at BTU Cottbus-…
An aeroacoustic investigation into the effect of self-oscillating trailing edge flaplets
E. Talboys, T. F. Geyer, C. Bruecker
The aeroacoustics of a NACA 0012 aerofoil with an array of self-oscillating flexible flaplets attached on the trailing edge has been investigated at low to moderate chord based Rey…
Dielectrophoretic force-driven convection in annular geometry under Earth's gravity
Torsten Seelig, Antoine Meyer, Philipp Gerstner +5
Context: A radial temperature gradient together with an inhomogeneous radial electric field gradient is applied to a dielectric fluid confined in a vertical cylindrical annulus ind…
Layer formation in double-diffusive convection over resting and moving heated plates
Florian Zaussinger, Friedrich Kupka
We present a numerical study of double-diffusive convection characterized by a stratification unstable to thermal convection while at the same time a mean molecular weight (or solu…
A study of turbulence and interacting inertial modes in a differentially-rotating spherical shell experiment
Michael Hoff, Uwe Harlander, Santiago A. Triana
We present a study of inertial modes in a differentially rotating spherical shell (spherical Couette flow) experiment with a radius ratio of . Inertial modes are Coriolis-r…
The stratorotational instability of Taylor-Couette flows of moderate Reynolds numbers
G. Rüdiger, T. Seelig, M. Schultz +3
In view of new experimental data the instability against adiabatic nonaxisymmetric perturbations of a Taylor-Couette flow with an axial density stratification is considered in depe…
Double-diffusive convection and baroclinic instability in a differentially heated and initially stratified rotating system: the barostrat instability
Miklos Vincze, Ion Borcia, Uwe Harlander +1
A water-filled differentially heated rotating annulus with initially prepared stable vertical salinity profiles is studied in the laboratory. Based on two-dimensional horizontal pa…
A Characteristic Dynamic Mode Decomposition
Jörn Sesterhenn, Amir Shahirpour
Temporal or spatial structures are readily extracted from complex data by modal decompositions like Proper Orthogonal Decomposition (POD) or Dynamic Mode Decomposition (DMD). Subsp…
Taylor-Couette turbulence at radius ratio : scaling, flow structures and plumes
Roeland C. A. van der Veen, Sander G. Huisman, Sebastian Merbold +4
Using high-resolution particle image velocimetry we measure velocity profiles, the wind Reynolds number and characteristics of turbulent plumes in Taylor-Couette flow for a radius…
Momentum transport in Taylor-Couette flow with vanishing curvature
Hannes J. Brauckmann, Matthew Salewski, Bruno Eckhardt
We numerically study turbulent Taylor-Couette flow (TCF) between two independently rotating cylinders and the transition to rotating plane Couette flow (RPCF) in the limit of infin…
An experimental study of regime transitions in a differentially heated baroclinic annulus with flat and sloping bottom topographies
Miklos Vincze, Uwe Harlander, Thomas von Larcher +1
A series of laboratory experiments has been carried out in a thermally driven rotating annulus to study the onset of baroclinic instability, using horizontal and uniformly sloping…