M. Breuer
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View article: Investigation of cohesive particle deagglomeration in homogeneous isotropic turbulence using particle-resolved direct numerical simulation
Investigation of cohesive particle deagglomeration in homogeneous isotropic turbulence using particle-resolved direct numerical simulation Open
In this study, agglomerate breakage in homogeneous isotropic turbulence is investigated using particle-resolved direct numerical simulations. Single agglomerates composed of 500 monodisperse spherical particles are considered, and their in…
View article: Investigation of cohesive particle deagglomeration in homogeneous isotropic turbulence using particle-resolved DNS
Investigation of cohesive particle deagglomeration in homogeneous isotropic turbulence using particle-resolved DNS Open
In this study, agglomerate breakage in homogeneous isotropic turbulence is investigated using particle-resolved direct numerical simulations. Single agglomerates composed of 500 monodisperse spherical particles are considered, and their in…
View article: Numerical investigation of transition on a wind turbine blade under free stream turbulence at $\boldsymbol {Re_c=10^6}$
Numerical investigation of transition on a wind turbine blade under free stream turbulence at $\boldsymbol {Re_c=10^6}$ Open
Laminar–turbulent transition on the suction surface of the LM45.3p blade ( $20\,\%$ thickness) was investigated using wall-resolved large eddy simulation (LES) at a chord Reynolds number of $Re_c=10^6$ and angle of attack $4.6^\circ$ . The…
View article: Combination of two FSI methods and their validation based on artificial wind gusts impacting a flexible T-structure
Combination of two FSI methods and their validation based on artificial wind gusts impacting a flexible T-structure Open
International audience
View article: An improved simulation methodology for nanoparticle injection through aerodynamic lens systems
An improved simulation methodology for nanoparticle injection through aerodynamic lens systems Open
Aerosol injectors applied in single-particle diffractive imaging experiments demonstrated their potential in efficiently delivering nanoparticles with high density. Continuous optimization of injector design is crucial for achieving high-d…
View article: An improved numerical simulation methodology for nanoparticle injection through aerodynamic lens systems
An improved numerical simulation methodology for nanoparticle injection through aerodynamic lens systems Open
Aerosol injectors applied in single-particle diffractive imaging experiments demonstrated their potential in efficiently delivering nanoparticles with high density. Continuous optimization of injector design is crucial for achieving high-d…
View article: Fluid–structure interaction simulations of wind gusts impacting a hyperbolic paraboloid tensile structure
Fluid–structure interaction simulations of wind gusts impacting a hyperbolic paraboloid tensile structure Open
The paper focuses on fluid–structure interactions (FSI) between a turbulent, gusty fluid flow, and a membrane structure. Lightweight structures are particularly vulnerable to wind gusts and can be completely destroyed by them, making it es…
View article: Synchronous high-speed measurements of a flexible structure under wind gust load
Synchronous high-speed measurements of a flexible structure under wind gust load Open
Simultaneously measuring the fluid flow around a flexible structure and the resulting deformations during short-term yet highly dynamic flow events is the focus of this fluid–structure interaction (FSI) study. These scenarios occur when a …
View article: A numerical method to mimic an experimental wind gust generator: The immersed boundary gust generator
A numerical method to mimic an experimental wind gust generator: The immersed boundary gust generator Open
To generate horizontal wind gusts in a classical wind tunnel, Wood, Breuer, and Neumann [A novel approach for artificially generating horizontal wind gusts based on a movable plate: The paddle,” J. Wind Eng. Ind. Aerodyn. 230, 105170 (2022…
View article: Accuracy and Performance Evaluation of Low Density Internal and External Flow Predictions using CFD and DSMC
Accuracy and Performance Evaluation of Low Density Internal and External Flow Predictions using CFD and DSMC Open
The Direct Simulation Monte Carlo (DSMC) method was widely used to simulate low density gas flows with large Knudsen numbers. However, DSMC encounters limitations in the regime of lower Knudsen numbers (Kn<0.1). In such cases, approaches f…
View article: Surrogate-based optimization for the worst-case prediction regarding a flexible structure impacted by wind gusts
Surrogate-based optimization for the worst-case prediction regarding a flexible structure impacted by wind gusts Open
International audience
View article: Evaluation of an efficient data-driven ANN model to predict agglomerate collisions within Euler–Lagrange simulations
Evaluation of an efficient data-driven ANN model to predict agglomerate collisions within Euler–Lagrange simulations Open
In this study, a recently developed data-driven model for the collision-induced agglomerate breakup (CHERD 195, 2023) is evaluated. It is especially intended for Euler–Lagrange simulations of flows with high mass loadings, where coupled CF…
View article: Toward coupled fire‐structure simulations for forecasting smoke leakage in case of concrete structures under fire
Toward coupled fire‐structure simulations for forecasting smoke leakage in case of concrete structures under fire Open
Computational modeling of the fire‐structure interaction demands the coupling between several models typically implemented in independent simulation software describing distinct physical processes. For instance, in the event of a fire brea…
View article: Numerical study of the hydrodynamic stability of a wind-turbine airfoil with a laminar separation bubble under free-stream turbulence
Numerical study of the hydrodynamic stability of a wind-turbine airfoil with a laminar separation bubble under free-stream turbulence Open
The interaction of several instabilities and the influence of free-stream turbulence on laminar-turbulent transition on a 20% thick wind-turbine blade section with a laminar separation bubble (LSB) are investigated with wall-resolved large…
View article: Data-driven ANN approach for binary agglomerate collisions including breakage and agglomeration
Data-driven ANN approach for binary agglomerate collisions including breakage and agglomeration Open
The present contribution is a follow-up of a recently conducted study to derive a data-driven model for the breakage of agglomerates by wall impacts. This time the collision-induced breakage of agglomerates and concurrently occurring parti…
View article: Influence of free-stream turbulence on the boundary layer stability of a wind turbine airfoil and near wake
Influence of free-stream turbulence on the boundary layer stability of a wind turbine airfoil and near wake Open
Free-stream turbulence (FST) alters the boundary layer of wind turbine blades, changing the hydrodynamic stability and near wake. Large-eddy simulations (LES) of a blade section with a laminar separation bubble for several turbulence inten…
View article: On the laminar–turbulent transition mechanism on megawatt wind turbine blades operating in atmospheric flow
On the laminar–turbulent transition mechanism on megawatt wind turbine blades operating in atmospheric flow Open
Among a few field experiments on wind turbines for analyzing laminar–turbulent boundary layer transition, the results obtained from the DAN-AERO and aerodynamic glove projects provide significant findings. The effect of inflow turbulence o…
View article: Aeroelastic response of an elastically mounted 2-DOF airfoil and its gust-induced oscillations
Aeroelastic response of an elastically mounted 2-DOF airfoil and its gust-induced oscillations Open
The paper is concerned with numerical investigations on the effect of vertical wind gusts on airfoils in a parameter range relevant for Micro-Air Vehicles. Using a simplified substitute model instead of an elastic wing, a rigid but elastic…
View article: A novel approach for artificially generating horizontal wind gusts based on a movable plate: The Paddle
A novel approach for artificially generating horizontal wind gusts based on a movable plate: The Paddle Open
The paper is concerned with a novel approach to generate horizontal wind gusts in classical wind tunnels. Assuming an open test section of an Eiffel- or Göttingen-type wind tunnel, the new wind gust generator denoted "The Paddle" can be ea…
View article: On the laminar-turbulent transition mechanism on Multi-Megawatt wind turbine blades operating in atmospheric flow
On the laminar-turbulent transition mechanism on Multi-Megawatt wind turbine blades operating in atmospheric flow Open
Among a few field experiments on wind turbines for analyzing laminar-turbulent boundary layer transition, the results obtained from the DAN-AERO and aerodynamic Glove projects provide significant findings. The effect of inflow turbulence o…
View article: Investigation into boundary layer transition using wall-resolved large-eddy simulations and modeled inflow turbulence
Investigation into boundary layer transition using wall-resolved large-eddy simulations and modeled inflow turbulence Open
The objective of the present paper is to investigate the transition scenario of the flow around a typical section of a wind turbine blade exposed to different levels of inflow turbulence. A rather low Reynolds number of Rec=105 is studied …
View article: Effects of grape phylloxera leaf infestation on grapevine growth and yield parameters in commercial vineyards: a pilot study
Effects of grape phylloxera leaf infestation on grapevine growth and yield parameters in commercial vineyards: a pilot study Open
Grape phylloxera (Daktulosphaira vitifoliae) can infest both roots and leaves of Vitis species. In commercial vineyards planted with Vitis vinifera scions grafted on rootstocks, grape phylloxera infestation is generally limited to root fee…
View article: Neural-network based approach for modeling wall-impact breakage of agglomerates in particle-laden flows applied in Euler–Lagrange LES
Neural-network based approach for modeling wall-impact breakage of agglomerates in particle-laden flows applied in Euler–Lagrange LES Open
The present study proposes a novel modeling approach for predicting the wall-impact breakage of agglomerates in wall-bounded particle-laden turbulent flows based on artificial neutral networks (ANN). The suggested model is especially usefu…