Projects
Towards an Improved Understanding and Numerical Simulation of Wave and Sediment Dynamics in the Shoaling Zone KU Leuven
Coastal regions worldwide are popular destinations for human beings to live, work and recreate, yet they are widely threatened by erosion and flood risks associated with sea rise and severe storms. The understanding and both short and long-term predictions with numerical simulations of nearshore hydro- and morphodynamics remain thus essential in helping the policy makers to ensure coastal safety and develop cost-effective protection ...
Efficient Combination of Numerical Models for Full Audio Range Simulations in Virtual Reality KU Leuven
Due to the large range of audible frequencies, from 20 Hz to 20 kHz, the physical behavior of sound waves cannot be captured with a single numerical method. Therefore, different acoustic modelling strategies exist, based on the assessment if the sound waves can be categorized as low-, mid- or high frequency. For low-frequency problems the wave propagation is usually modeled with the Finite Element Method (FEM) or the Boundary Element Method, ...
Characterization of Passive Acoustic Dampers with Orifices using Linear and Nonlinear Numerical Models KU Leuven
Passive acoustic dampers in the form of Helmholtz resonators, perforated plates and liners, are commonly used to suppress noise propagation or to control the acoustic feedback that can lead to thermo-acoustic instabilities in combustion engines. Their robustness, acoustic properties and easy integration into existing systems make them an appealing solution for noise control in many applications, from air conditioning systems in buildings to ...
Spherical Wave Based Macromodelling for EMC/EMI System Analysis KU Leuven
Nowadays, full-wave electromagnetic simulation tools are widely used in antenna design, and their employment in the assessment of electronic designs with respect to ElectroMagnetic Compatibility (EMC) has increased significantly over the past years, owing to an exponential increase in the integration of functionality and the clock rates of new designs. However, several developers are still rather reserved about their engagement to embrace the ...
Efficient vibro-acoustic simulations using isogeometric analysis and its hybrid coupling with the wave based method. KU Leuven
This dissertation presents research contributions to the development of flexible NURBS-based isogeometric frameworks for performing vibro-acoustic simulations in the low- to mid-frequency range. The research is set in the light of the increasing importance of being able to numerically predict the noise and vibration characteristics of products, driven by growing market expectations and tightening regulations. The main aim of isogeometric ...
Thermoacoustic Instability prediction based on time-harmonic linearized acoustic propagation models KU Leuven
1.1. Context: Thermoacoustic instabilities arise from the interaction of acoustic waves and unsteady heat release. Such instabilities must be controlled because they can produce excessive noise and may even result in massive structural damage. This is particularly true for thermoacoustic combustion instabilities encountered in many industrial applications such as domestic burners, gas turbines or rocket engines. In these cases, the heat ...
Wave properties in the low solar atmosphere KU Leuven
The solar atmosphere is in a dynamic state and ubiquitous waves can be observed in all layers. At the same time, above the photosphere, the temperature increases in the chromosphere and corona with increasing distance from the solar surface. It is yet not clear which non-thermal process supplies the upper layers with sufficient energy to maintain their temperature. This is termed the coronal heating problem. The ubiquitous waves in the solar ...
Hydrodynamic Modelling of Wave Energy Converter Arrays KU Leuven
Wave energy from wind-generated waves in the ocean or sea is absorbed by wave energy converters (WECs). In this research, floating point absorber (FPA) WECs are studied which are floating devices on the water surface. FPA WECs installed in the ocean or sea respond to the incoming waves and start moving in six degrees of freedom. The WECs extract energy from the waves by using a power take-off (PTO) system which converts the WEC's motion into ...
Inverse characterization of the orthotropic and viscoelastic material properties of lightweight plates using full field guided wave propagation data KU Leuven
With the advent of the 21st century, climate change-related issues began to play a crucial role in consumer decisions as well as in company objectives. To reduce carbon dioxide emission rates and increase sustainability, companies started to invest more in the development and implementation of advanced materials. Nowadays, lightweight materials such as fiber reinforced polymer laminates and wooden panels offer an alternative for metallic ...