Joris Degroote
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View article: Aero-servo simulations of an airborne wind energy system using geometry-resolved computational fluid dynamics
Aero-servo simulations of an airborne wind energy system using geometry-resolved computational fluid dynamics Open
Airborne wind energy (AWE) is an innovative and promising technology for harnessing wind energy, often achieved through the use of tethered aircraft flying in crosswind patterns. A comprehensive understanding of the unsteady interactions b…
View article: Introducing DAIMYO: A Dynamic Design Architecture and Its Application to Unmanned Aerial System Development
Introducing DAIMYO: A Dynamic Design Architecture and Its Application to Unmanned Aerial System Development Open
In recent years, there has been a notable evolution in various multidisciplinary design methodologies for dynamic systems. Among these approaches, a noteworthy concept is that of concurrent conceptual and control design, or codesign. This …
View article: Reinforcement Twinning for Hybrid Control of Flapping-Wing Drones
Reinforcement Twinning for Hybrid Control of Flapping-Wing Drones Open
Controlling the flight of flapping-wing drones requires versatile controllers that handle their time-varying, nonlinear, and underactuated dynamics from incomplete and noisy sensor data. Model-based methods struggle with accurate modeling,…
View article: Aero-servo simulations of an airborne wind energy system using geometry-resolved computational fluid dynamics
Aero-servo simulations of an airborne wind energy system using geometry-resolved computational fluid dynamics Open
Airborne wind energy (AWE) is an innovative technology to harness wind energy, often through the use of tethered aircraft flying in crosswind patterns. A comprehensive understanding of the unsteady interactions between the wind and the air…
View article: A Two-Phase Flow Solver with Variable Liquid Compressibility and Temperature Equation for Partitioned Simulation of Elastohydrodynamic Lubrication
A Two-Phase Flow Solver with Variable Liquid Compressibility and Temperature Equation for Partitioned Simulation of Elastohydrodynamic Lubrication Open
This paper presents a new solver developed in OpenFOAM for the modeling of lubricant in the narrow gap between two surfaces inducing hydrodynamic pressures up to few gigapascal. Cavitation is modeled using the homogeneous equilibrium model…
View article: Introducing DAIMYO: a first-time-right dynamic design architecture and its application to tail-sitter UAS development
Introducing DAIMYO: a first-time-right dynamic design architecture and its application to tail-sitter UAS development Open
In recent years, there has been a notable evolution in various multidisciplinary design methodologies for dynamic systems. Among these approaches, a noteworthy concept is that of concurrent conceptual and control design or co-design. This …
View article: Fluid-structure interaction modeling of dry wire drawing by coupling OpenFOAM models of lubricant film and metal wire
Fluid-structure interaction modeling of dry wire drawing by coupling OpenFOAM models of lubricant film and metal wire Open
A steady 2D axisymmetric fluid-structure interaction model of dry wire drawing is developed to numerically investigate the interaction between the thin lubricant film and the plastically deforming steel wire. To reduce the computational co…
View article: On the unsteady aerodynamics of flapping wings under dynamic hovering kinematics
On the unsteady aerodynamics of flapping wings under dynamic hovering kinematics Open
Hummingbirds and insects achieve outstanding flight performance by adapting their flapping motion to the flight requirements. Their wing kinematics can change from smooth flapping to highly dynamic waveforms, generating unsteady aerodynami…
View article: A computational fluid dynamics study to assess the impact of coughing on cerebrospinal fluid dynamics in Chiari type 1 malformation
A computational fluid dynamics study to assess the impact of coughing on cerebrospinal fluid dynamics in Chiari type 1 malformation Open
Chiari type 1 malformation is a neurological disorder characterized by an obstruction of the cerebrospinal fluid (CSF) circulation between the brain (intracranial) and spinal cord (spinal) compartments. Actions such as coughing might evoke…
View article: Moving control surfaces in a geometry-resolved CFD model of an airborne wind energy system
Moving control surfaces in a geometry-resolved CFD model of an airborne wind energy system Open
Properly understanding the unsteady interaction of the wind with the aircraft is critical to develop reliable airborne wind energy (AWE) systems. High-fidelity simulation tools are needed to accurately predict these interactions, providing…
View article: Experimental validation of a design model for latent thermal energy storage extended with sensible heat
Experimental validation of a design model for latent thermal energy storage extended with sensible heat Open
Latent thermal energy storage can be a key technology for a green energy transition by matching fluctuating heat demand and supply. In order to implement a storage system, it needs to be designed which requires estimating the outlet temper…
View article: Limitations of the enthalpy-porosity method for numerical simulation of close-contact melting on inclined surfaces
Limitations of the enthalpy-porosity method for numerical simulation of close-contact melting on inclined surfaces Open
One of the main challenges for latent thermal energy storage (LTES) systems is low heat transfer rates due to the low thermal conductivity of most phase change materials (PCM). Close-contact melting (CCM) can accelerate melting times in LT…
View article: On the number of subproblem iterations per coupling step in partitioned fluid‐structure interaction simulations
On the number of subproblem iterations per coupling step in partitioned fluid‐structure interaction simulations Open
In literature, the cost of a partitioned fluid‐structure interaction scheme is typically assessed by the number of coupling iterations required per time step, while ignoring the internal iterations within the nonlinear subproblems. In this…
View article: A new approach towards assessing convergence of partitioned fluid-structure interaction simulations
A new approach towards assessing convergence of partitioned fluid-structure interaction simulations Open
A partitioned algorithm couples distinct solvers by exchanging data on their common interface. In the case of strong coupling, where multiple coupling iterations are performed per time step, a convergence criterion is required to indicate …
View article: Convergence behaviour of partitioned methods for conjugate heat transfer problems
Convergence behaviour of partitioned methods for conjugate heat transfer problems Open
Conjugate heat transfer (CHT) considers the simultaneous solution of heat transfer in adjacent solid and fluid domains. If solved with a partitioned approach, temperature and heat flux are exchanged to achieve a thermal equilibrium at the …
View article: Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow: code and data
Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow: code and data Open
These files accompany the following publication: Dolfen, H., Vandewalle, S., & Degroote, J. (2023). Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow. Nuclear Engineering and Design, 411, 1124…
View article: Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow: code and data
Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow: code and data Open
These files accompany the following publication: Dolfen, H., Vandewalle, S., & Degroote, J. (2023). Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow. Nuclear Engineering and Design, 411, 1124…
View article: Quasi-Newton Methods for Partitioned Simulation of Fluid–Structure Interaction Reviewed in the Generalized Broyden Framework
Quasi-Newton Methods for Partitioned Simulation of Fluid–Structure Interaction Reviewed in the Generalized Broyden Framework Open
Fluid–structure interaction simulations can be performed in a partitioned way, by coupling a flow solver with a structural solver. However, Gauss–Seidel iterations between these solvers without additional stabilization efforts will converg…
View article: Sensitivity of TEHL Simulations to the Use of Different Models for the Constitutive Behaviour of Lubricants
Sensitivity of TEHL Simulations to the Use of Different Models for the Constitutive Behaviour of Lubricants Open
This study compares the film thickness, lubricant temperature, and traction curves of two groups of commonly used constitutive models for lubricants in thermo-elastohydrodynamic lubrication (TEHL) modelling. The first group consists of the…
View article: On the number of subproblem iterations per coupling step in partitioned fluid-structure interaction simulations
On the number of subproblem iterations per coupling step in partitioned fluid-structure interaction simulations Open
In literature, the cost of a partitioned fluid-structure interaction scheme is typically assessed by the number of coupling iterations required per time step, while ignoring the internal iterations within the nonlinear subproblems. In this…