Experimental investigation of flow fields in the interstices of bulk particles with ray tracing based reconstruction (A01)

• Subject Area: Fluid Mechanics ; Image and Language Processing, Computer Graphics and Visualisation, Human Computer Interaction, Ubiquitous and Wearable Computing
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 422037413

A1 examines the flow field in granular assemblies of spherical particles. The challenge of the project is to measure velocities of the gas phase directly based on Particle Image Velocimetry. For this, PIV is combined with ray tracing simulations, which is a novel approach for measurements in dense bulk solids. The ray tracing simulation enables the separation of the contributions of the different light beam paths to the recorded image, which allows to correct the PIV-images of the flow. The high sensitivity of the method to a precise correspondence between the experimental setup and the simulation will be addressed. With this approach, the project provides direct measurements of mean and fluctuating velocity fields in granular assemblies.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 287: BULK-REACTION - Reacting and moving granular assemblies with gas flow
• Applicant Institution: Ruhr-Universität Bochum
• Project Heads: Professor Dr. Christian Lessig; Dr.-Ing. Katharina Zähringer