Jeroen van Beeck

Von Karman Institute for Fluid Dynamics

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Sara Porchetta

Von Karman Institute for Fluid Dynamics

Sophia Buckingham

Von Karman Institute for Fluid Dynamics

Orkun Temel

Royal Observatory of Belgium

Gertjan Glabeke

Von Karman Institute for Fluid Dynamics

Wim Munters

Von Karman Institute for Fluid Dynamics

Maria Rosaria Vetrano

KU Leuven

Catherine Gorlé

Stanford University

Domingo Muñoz‐Esparza

NSF National Center for Atmospheric Research

Laurent Bricteux

University of Mons

Sara González Ruiz

Von Karman Institute for Fluid Dynamics

Cooperative Institutions

Von Karman Institute for Fluid Dynamics

Vrije Universiteit Brussel

Centre National de la Recherche Scientifique

KU Leuven

Eindhoven University of Technology

Université Libre de Bruxelles

Ghent University

Complexe de Recherche Interprofessionnel en Aérothermochimie

Université de Rouen Normandie

UCLouvain

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Data S4 from The evolution of darker wings in seabirds in relation to temperature-dependent flight efficiency

Figshare (2021)

Svana Rogalla Michaël P. J. Nicolaï Sara Porchetta Gertjan Glabeke Claudia Battistella

S4 Seabird Phylogeny Reflectance Measurements

10.6084/m9.figshare.14822035

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Citations (0)

Global Rainbow Thermometry in liquid-liquid suspension

Maria Rosaria Vetrano Jeroen van Beeck

Suspension

Rainbow

Source

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Citations (0)

Evaluation of the antarctic surface wind climate from ERA reanalyses and RACMO2/ANT simulations based on automatic weather stations

Climate Dynamics (2012)

Javier Sanz Rodrigo Jean-Marie Buchlin Jeroen van Beeck Jan T. M. Lenaerts M. R. van den Broeke

Katabatic wind

Peninsula

10.1007/s00382-012-1396-y

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Citations (65)

A New Planetary Boundary Layer Scheme Based on LES: Application to the XPIA Campaign

Journal of Advances in Modeling Earth Systems (2019)

Cem Berk Senel Orkun Temel Sara Porchetta Domingo Muñoz‐Esparza Jeroen van Beeck

Abstract We present a new planetary boundary layer scheme based on large‐eddy simulations for different atmospheric stability classes. Large‐eddy simulations results are compared with the wind speed measurements from the meteorological mast at the Test Centre for Large Wind Turbines at Høvsøre, Denmark. A generic formulation for the determination of mixing length scale is proposed and incorporated with the updated closure coefficients derived under realizability constraints by Temel et al. (2018, https://doi.org/10.1016/j.jweia.2018.01.002 ). The new planetary boundary layer scheme is implemented into the Weather Research and Forecasting model to perform mesoscale simulations for the Høvsøre test site as an idealized case as well as for a real‐data case at the eXperimental Planetary boundary layer Instrumentation Assessment campaign. Results of the idealized case reveal that the proposed scheme, VKI01, well represents the potential temperature and wind speed characteristics. It decreases mean absolute errors for most of the stability levels despite a slight overestimation for near‐neutral stable and very stable conditions. Regarding the real‐data case, a significant improvement has been achieved by the VKI01 for both turbulence kinetic energy and its dissipation rate in comparison to sonic anemometer measurements for a 2‐day period during the eXperimental Planetary boundary layer Instrumentation Assessment campaign.

Anemometer

Atmospheric instability

Instrumentation

10.1029/2018ms001580

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Citations (9)

Acoustic attenuation of cohesive sediments (mud) at high ultrasound frequencies

Proceedings of meetings on acoustics (2022)

Bart Brouwers Jeroen van Beeck Evert Lataire

The acoustic attenuation of cohesive sediment (mud) at high frequencies ranging from 0.5 MHz to 5.0 MHz is determined. Conventional laboratory experiments based on the pulse-echo technique were performed using a single element immersible ultrasound transducer. The results showed however that due to the time-changing properties of mud a different approach to process the data is required. Additional experiments to determine the acoustic attenuation using multiple alternative ultrasonic devices were conducted. Using the results of the conventional experiments as a benchmark the reliability of these experiments is considered acceptable. This manuscript was originally submitted to the ICUA 2022 conference.

Acoustic attenuation

Ranging

Echo (communications protocol)

10.1121/2.0001594

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Citations (2)

Dispersion in the Wake of a Rectangular Building: Validation of Two Reynolds-Averaged Navier–Stokes Modelling Approaches

Boundary-Layer Meteorology (2010)

Catherine Gorlé Jeroen van Beeck Patrick Rambaud

Turbulence Modeling

Reynolds stress

Turbulent diffusion

Schmidt number

10.1007/s10546-010-9521-0

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Citations (48)

Wind tunnel simulation of the wind conditions inside bidimensional forest clear-cuts. Application to wind turbine siting

Journal of Wind Engineering and Industrial Aerodynamics (2007)

Javier Sanz Rodrigo Jeroen van Beeck Gábor Dezső-Weidinger

Tree canopy

10.1016/j.jweia.2007.01.001

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Citations (30)

A remote microphone technique for aeroacoustic measurements in large wind tunnels

Applied Acoustics (2017)

Yakut Cansev Küçükosman Christophe Schram Jeroen van Beeck

The present study was devoted to the development and application of a remote microphone technique for aeroacoustic measurements in large aerodynamic wind tunnels. In this technique, the microphone and its connecting line to the sensing port are fitted within an aerodynamically streamlined fairing. A model-based calibration method was applied to account for the phase lag and dissipation within the microphone connecting line. The proposed system permits to carry out acoustic measurements when the wind tunnel surface cannot be altered, since the fairing can be simply glued on the wall. The fairing is streamlined to minimize flow disturbances as well as the risk of separation which would otherwise contaminate the wind tunnel flow quality and acoustic measurements. It was furthermore hoped that the acceleration of the flow over the fairing surface might reduce the turbulence fluctuations and thereby increase the signal-to-noise ratio of the acoustic measurements. Those aerodynamic effects were investigated with a set of hot-wire measurements performed in the subsonic L2B small wind tunnel of von Karman Institute (VKI). The mean velocity and the turbulence intensity profile were analyzed in the presence of different inflow turbulence characteristics at 5, 10 and 15 m/s freestream velocity. The effect of incident turbulence on the acoustic measurement was investigated applying the calibration procedure and comparing the measurements with a wall-mounted reference microphone signal in similar flow conditions. The results indicate that the wished beneficial effects of the flow acceleration are not significant. As an application, this technique is used to measure the noise emitted from the contra-rotating fans of the large L1 subsonic wind tunnel of the von Karman Institute, where the microphone fairing is placed inside the diffuser and thus subjected to a thick turbulent boundary layer. The results indicate that in spite of the mitigated turbulence-reduction performance of the fairing, it provides a measurement solution that is suitable for large wind tunnels provided the signals are compensated using the measured dynamic calibration. While it should be stressed that the calibration procedure itself is not new, the originality of the present paper stands in the proposed fairing design, and in the aerodynamic/acoustic investigation of its effect on the flow.

Freestream

10.1016/j.apacoust.2017.08.018

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Citations (6)

Assessment of the turbulence parameterization schemes for the Martian mesoscale simulations

cosp (2016)

Orkun Temel Özgür Karatekin Jeroen van Beeck

Source

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Application of Ultrasound Image Velocimetry (UIV) to cohesive sediment (fluid mud) flows

Deleted Journal (2024)

Bart Brouwers Jeroen van Beeck Evert Lataire

Abstract Ultrasound image velocimetry (UIV) is a technique that enables non-intrusive whole-flow field velocimetry measurements in opaque fluids. It gained interest in experimental fluid dynamics to study the flow mechanics of, amongst others, sediment-laden fluids. Further customisation of this technique is required to make it a reliable asset for experimental research involving high density cohesive sediments (fluid mud). Potential applications include rheological or settling experiments or experiments serving nautical research on the interaction between a ship, water and fluid mud forming the bottom of the navigation channel. This study presents experiments to validate the applicability of UIV in such dense cohesive sediments exhibiting non-Newtonian and thixotropic behaviour. During these experiments, an ultrasound transducer was moved through stationary mud at known velocities. Due to the viscosity of the mud, the zone of influence of the moving transducer is limited in depth. This enables the recording of the relative velocity between moving transducer and the undisturbed mud at greater depths. Medical ultrasound imaging equipment was used, as such equipment allows ultrasound imaging in the required frequency range and frame rate. A good correlation (accuracy $$>95$$ > 95 %) was found between the imposed motion velocity of the transducer and the output of UIV. However, limitations were found in both depth and velocity, caused by the equipment, settings and mud properties.

Velocimetry

10.1007/s42452-024-05747-y

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Citations (1)