User: Guest  Login
Title:

Experimental and numerical analysis of void structure in random packed beds of spheres

Document type:
Zeitschriftenaufsatz
Author(s):
von Seckendorff, Jennie; Achterhold, Klaus; Pfeiffer, Franz; Fischer, Richard; Hinrichsen, Olaf
Abstract:
The prediction of the pressure drop of packed beds requires an accurate estimation of the packed-bed porosity as its error propagation multiplies the occurring errors by a factor of about four. For a better understanding of the packed bed's local porosity characteristics, a comprehensive x-ray tomography study was performed investigat- ing and correlating the void structure of packed beds made of smooth, mono-sized spheres in cylindrical confin- ing walls having tube-to-particle diameter ratios λ = 3.0 to 9.0 reinforced by numerically generated packed beds of λ = 1.1 to 9.0. An in-depth analysis of the obtained oscillating void profiles is performed, discussing the loca- tions and heights of porosity extrema. Most importantly, a significant and in parts surprising extrema formation in the tube's center is described, especially present for λ < 6, which is assumed to have a predominant effect on the packed bed's pressure drop.
Keywords:
Packed-beds, Numerical modeling validation, X-ray tomography, Radial porosity profiles, Contact number
Journal title:
Powder Technology
Year:
2021
Journal volume:
380
Pages contribution:
613-628
Reviewed:
ja
Language:
en
Fulltext / DOI:
doi:10.1016/j.powtec.2020.11.026
WWW:
https://www.sciencedirect.com/science/article/pii/S0032591020310792
Publisher:
Elsevier BV
E-ISSN:
0032-5910
Date of publication:
01.03.2021
 BibTeX