TY - GEN
T1 - Time resolved particle image velocimetry measurements inside a packed bed reactor
AU - Dominguez-Ontiveros, E.
AU - Estrada-Perez, C.
AU - Hassan, Y.
PY - 2008
Y1 - 2008
N2 - The aim of this work is to present the progress of experimental approaches used to investigate the flow pattern towards mass and heat transfer phenomena within a pebble bed. Most of the studies on packed beds consider the porous medium approach to obtain lumped parameters from which bulk characteristics of the flow are determined. This conventional approach neglects the complex flow details within individual pores and constrictions, thus obscuring the physical basis of the model. The experimental approach presented uses Particle Image Velocimetry (PIV) and Matching Refractive Index (MRI) techniques to obtain velocity measurements within a packed bed at the microscopic (pore) level. To completely understand and describe the physical process occurring within the system, local information is required. The main results of velocity measurements for single-phase flow conditions are presented under various flow conditions with Reynolds numbers ranging between 50 and 500, based on particle diameter. The results show evidence of various recirculation zones within the pores. Measurements of flow path within a single pore show considerable changes under various flow conditions. Vortex identification at various pore locations exhibits the need for consideration of additional parameters in the models to accurately describe flow structure in a packed bed.
AB - The aim of this work is to present the progress of experimental approaches used to investigate the flow pattern towards mass and heat transfer phenomena within a pebble bed. Most of the studies on packed beds consider the porous medium approach to obtain lumped parameters from which bulk characteristics of the flow are determined. This conventional approach neglects the complex flow details within individual pores and constrictions, thus obscuring the physical basis of the model. The experimental approach presented uses Particle Image Velocimetry (PIV) and Matching Refractive Index (MRI) techniques to obtain velocity measurements within a packed bed at the microscopic (pore) level. To completely understand and describe the physical process occurring within the system, local information is required. The main results of velocity measurements for single-phase flow conditions are presented under various flow conditions with Reynolds numbers ranging between 50 and 500, based on particle diameter. The results show evidence of various recirculation zones within the pores. Measurements of flow path within a single pore show considerable changes under various flow conditions. Vortex identification at various pore locations exhibits the need for consideration of additional parameters in the models to accurately describe flow structure in a packed bed.
UR - http://www.scopus.com/inward/record.url?scp=52349102265&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:52349102265
SN - 9781604238716
T3 - Societe Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"
SP - 1894
EP - 1900
BT - Societe Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"
T2 - Societe Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"
Y2 - 13 May 2007 through 18 May 2007
ER -