Contact

Dr. Gregory Lecrivain

Head Particle dynamics
Fluid Dynamics Resource technology Processes
g.lecrivainAthzdr.de
Phone: +49 351 260 3768

Particle-laden flows

Particle-laden flows occur in many resource processes such as froth flotation, leaching, or grinding. We research such flows with advanced experimental and numerical tools to predict the particle behavior and optimize processes.

Foto: Finest ©Copyright: Dr. Gregory Lecrivain

Investigation of pow­der mixing for fine particle recycling

The project FINEST processes different residues in an optimized manner to generate value and to minimize hazards.
More
Foto: Particle resuspension ©Copyright: Dr. Gregory Lecrivain

Particle resuspension in environmental flows

We aim to understand the micromechanical behavior of particle resuspension through experimental and numerical approaches.
More
Foto: Fibredrop small ©Copyright: Dr. Gregory Lecrivain

Fiber dynamics at a fluidic interface

We investigate the dynamic behavior of long elastic fibers interacting with bubbles or droplets
More
Foto: Deposition and resuspension of nuclear aerosol particles in turbulent flows - reference picture ©Copyright: Dr. Gregory Lecrivain

Deposition and resuspension of nuclear aerosol particles in turbulent flows

The transport, deposition and resuspension behaviour of carbonaceous dust in the primary circuit of a High Temperature Reactors (HTR) is a fundamental safety issue for the development and safety assessment of such a reactor.
More
Foto: Capture of mineral particles by rising bubbles - reference picture ©Copyright: Dr. Gregory Lecrivain

Hydrodynamics of flotation

In the froth flotation process the valuable hydrophobic particles attach to the fluidic interface of rising bubbles while the undesired hydrophilic particles settle down to eventually be discharged. A bet­ter understanding with the help of a three-phase flow model to simulate the particle capture and appropriate microscale experiments using the in-house optical process microscope could help to make the capture of hydrophobic mineral particles more efficient.
More
Foto: Experimental investigation of binary granular mixing in a rotating drum using camera and ultrafast X-ray computed tomography - refpic ©Copyright: Theodoros Nestor Papapetrou

Investigation of binary granular mixing in a rotating drum

The mixing of two granular species is central to a variety of industrial processes. Notable examples include the mixing of dry granular products in the pharmaceutical, chemical and food processing industry using ap­paratuses such as mixing drums.
More
Foto: Particle remobilization in urban systems-refpic ©Copyright: Dr. Amir Banari

Particle remobilization in urban systems

Aeroallergens, such as those derived from pollen grains, are known to trigger asthma epidemics. Outbreaks are highly seasonal and their frequency increases in summer. During prolonged urban heat wave, a significant portion of the pollen deposits on urban surfaces.
More
Foto: UV ©Copyright: Marco Alejandro Cavagnola

Air cleaning ­techno­logies for pathogen inactivation and bioaerosols spread

Airborne transmission of pathogens became known to a wider public in the context of the COVID-19 pandemic. Recently required applications in hospitals as well as preparedness for future global threats demand the development of efficient air cleaning ­techno­logies for se­parating and inactivating pathogenic aerosol particles.
More
Foto: Taylorbubble with pollutants ©Copyright: Rhandrey Maestri

Taylorbubbles

Wet scrubbing is a simple and effective solution to remove nano- and micro-pollutants from gas. As individual gas bubbles rise in small channels, the suspended micro-pollutants bind to the liquid and hence se­parate.
More