Publications
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Numerical and Experimental Investigation of Ultrafine Particle Transport and Deposition in a Human Upper Airway Model Vrije Universiteit Brussel
The majority of the published numerical studies on the deposition of ultrafine particles in the human upper airways lack the validation of the predicted flow field and particle deposition. Thus, this study aims at validating the numerically predicted laminar-turbulent flow field and subsequent deposition of ultrafine particles in a realistic model of the human upper airways by means of experimental in vitro measurements. The simulated flow field ...
Numerical Study of Aerosol Deposition Behavior in a Simplified Human Upper Airway Model Vrije Universiteit Brussel
Aerosol deposition behavior during inspiratory breathing phase of respiration is studied numerically for a simplified human upper airway model (UAM). The numerical simulation is based on an Euler-Lagrange methodology. The Eulerian phase is simulated by using Reynolds Averaged Navier- Stokes equation (RANS) with the low Reynolds SST k-omega turbulence model. The aerosols are tracked in the Lagrangian frame by using the eddy interaction model ...
Validation of a Numerical Bending Model for Sandwich Beams with Textile-Reinforced Cement Faces by Means of Digital Image Correlation Vrije Universiteit Brussel
Sandwich panels with textile-reinforced cement (TRC) faces merge both structural and insulating performance into one lightweight construction element. To design with sandwich panels, predictive numerical models need to be thoroughly validated, in order to use them with high confidence and reliability. Numerical bending models established in literature have been validated by means of local displacement measurements, but are missing a full ...
Application of a simple enthalpy-based pyrolysis model in numerical simulations of pyrolysis of charring materials Ghent University
Numerical experiments on the dynamics of channelised lava flows at Mount Cameroon volcano with the FLOWGO thermo-rheological model Vrije Universiteit Brussel
As for many other effusive volcanoes, Mount Cameroon (MC) is a volcano for which only limited information exists on lava flow properties and emplacement dynamics for recent eruptions. This study provides new quantitative constraints for rheological and dynamic characteristics of lava flow effusion for the 1982 and 2000 eruptive events, used to calibrate the FLOWGO thermo-rheological model for these lava flows. The FLOWGO 1-D physical model is ...
A numerical procedure for model identifiability analysis applied to enzyme kinetics Ghent University
The proper calibration of models describing enzyme kinetics can be quite challenging. In the literature, different procedures are available to calibrate these enzymatic models in an efficient way. However, in most cases the model structure is already decided on prior to the actual calibration exercise, thereby bypassing the challenging task of model structure determination and identification. Parameter identification problems can thus lead to ...
Numerical simulations of pyrolysis of charring and non-charring materials using an enthalpy-based model Ghent University
The present work focuses on the application of a pyrolysis model, with enthalpy as basic variable, in numerical simulations of pyrolysis of dry and wet charring materials, as well as non-charring materials. In case of wet charring materials, the moisture first flows out after evaporation, leaving dry virgin solid material. This material then further heats up and finally generates a mass flow rate of combustible volatiles during the pyrolysis ...
Numerical Study of Local Deposition Mechanisms of Nanoparticles in a Human Upper Airway Model Vrije Universiteit Brussel
We carried out large-eddy simulation to study turbulent air flow and local deposition of inhaled nanoparticles with a 10nm diameter in an idealized human upper airway model for a steady inspiratory flow rate of 30l/min. We described the particles in an Eulerian framework and accounted for their Brownian motion by a diffusion coefficient calculated from the Stokes-Einstein relation. We calculated the turbulence subgrid-scale stresses and the ...