Research in The Environmental Multi-Phase Flow Laboratory (EMPFL) is directed towards environmental fluid flow problems such as dispersal of (bio-) aerosols in the atmospheric turbulent boundary layer, canopy flows and related particle dispersal/capture, erosion and particle deposition.
The EMPFL has state-of-the-art equipment for the measurement of the flow field as well as particle dispersion characteristics, such as two stereoscopic Particle Image Velocimetry (PIV) systems (one high-speed system) as well as a high speed holographic cinematography system.
- A square (50×50 mm2) water channel has been setup for the study of particle dynamics in turbulent flow. The fine scale structure of the turbulent boundary layer and its effect on particle entrainment and deposition is studied using both (high-speed) PIV as well as 3-D holographic particle tracking technique.
- Isotropic, homogeneous turbulence chamber (40x40x40 cm3). In this transparent cubic chamber we generate isotropic, homogeneous turbulence by means of eight woofers mounted on the each corner of the chamber. We introduce particles into this flow in order to study the effect of turbulence on the particle dispersal characteristics. For example, small droplet behavior in clouds, spherical vs. non-spherical particle behavior and the effect of turbulence on settling velocities.
- A small low velocity windtunnel (20×20 cm2 cross section) used for the study of flow patterns around (biological) structures that have morphological structures that may have an effect on particle release or capture.