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- 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
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