Browsing Bergen Open Research Archive by Author "Chang, Yu-Fen"
Now showing items 1-8 of 8
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Cohesive collisions of particles in liquid media studied by CFD-DEM, video tracking, and Positron Emission Particle Tracking
Saparbayeva, Nazerke; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Balakin, Boris; Struchalin, Pavel (Journal article; Peer reviewed, 2023)This paper investigates the cohesive collision of ice in an oil phase at temperatures ranging from −15.7 °C to −0.3 °C. The new information on the coefficient of restitution (COR) was obtained using three different velocity ... -
Development of an imaging method for in vivo single-cell tracking under high-noise conditions: a proof of principle
Chang, Yu-Fen; Struchalin, Pavel; Næss, Bodil; Adamsen, Tom Christian Holm; Balakin, Boris (Journal article; Peer reviewed, 2023)This paper reports the development of a positron imaging method for in vivo single-cell tracking under high-noise conditions. Following biological processes spatially and temporally at a single-cell level in a living ... -
A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking
Chang, Yu-Fen; Hoffmann, Alex Christian (Peer reviewed; Journal article, 2015-01-10)In this study the liquid flow in a reverse-flow hydrocyclone is studied experimentally using the Lagrangian approach. Resin beads with densities that are close to the density of the liquid in which they move, i.e. ... -
Non-invasive studies of multiphase flow in process equipment. Positron emission particle tracking technique
Balakin, Boris; Adamsen, Tom Christian Holm; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian (Peer reviewed; Journal article, 2017)Positron emission particle tracking (PEPT) is a novel experimental technique for non-invasive inspection of industrial fluid/particle flows. The method is based on the dynamic positioning of a positron-emitting, flowing ... -
Numerical investigation of a transformable modular PET system: Consideration of point-spread functions, module arrangements, and operation protocols
Chang, Yu-Fen; Thompson, Kyle; Teymurazyan, Aram; Siciliano, Steven D.; Papandreou, Zisis (Journal article; Peer reviewed, 2019)Positron emission tomography (PET) is a powerful tool for mapping the dynamic distribution of substances in visually opaque systems. A modular, scalable, transformable, and relocatable PET system is custom built to provide ... -
Numerical Study of the “End of the Vortex” Phenomenon in a Hydrocyclone Separator
Chang, Yu-Fen; Pisarev, Gleb; Hoffmann, Alex Christian (Peer reviewed; Journal article, 2011)The single‐phase flow field in a hydrocyclone was studied numerically using the LES turbulence model. The hydrocyclone geometry and flow conditions are in accordance with previous experimental work. An important phenomenon ... -
PEPT: an invaluable tool for 3-D particle tracking and CFD simulation verification in hydrocyclone studies
Chang, Yu-Fen; Adamsen, Tom Christian; Pisarev, Gleb; Hoffmann, Alex Christian (Journal article, 2013)Particle tracks in a hydrocyclone generated both experimentally by positron emission particle tracking (PEPT) and numerically with Eulerian-Lagranian CFD have been studied and compared. A hydrocyclone with a cylinder-on-cone ... -
Study of the flow in a hydrocyclone using positron emission particle tracking and computational fluid dynamics simulation
Chang, Yu-Fen (Doctoral thesis, 2016-06-22)This thesis presents my work of studying the flow in a hydrocyclone using positron emission particle tracking (PEPT) and computational fluid dynamics (CFD) simulation. Hydrocyclone separators are a type of cyclone separators ...