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Your search keyword '"Diameter ratio"' showing total 2 results
Start Over Descriptor "Diameter ratio" Language german
2 results on '"Diameter ratio"'

1. Einfluss elastischer Wellen beim elastischen Stoßvorgang kugelförmiger Granulate und Glaskugeln gegen dünne Platten Influence of Elastic Waves on the Elastic Impact of Spherical Granules and Glass Beads on Thin Plates.

Author

Müller, Peter, Böttcher, Ronny, Trüe, Michael, Russell, Alexander, and Tomas, Jürgen

Abstract

The Zener model for elastic sphere impacts has been solved with high accuracy and was used to evaluate the inelasticity parameter as well as the coefficient of restitution (CoR) for different material combinations and size ratios. Additionally, the model was modified to find a comfortable solution for the CoR. The proposed approach approximates the Zener model well for larger CoRs. Both models have been used to evaluate the CoR of γ-Al2O3 and zeolite-4A granules and elastic-plastic spherical particle products at impact with glass plates of different thicknesses. [ABSTRACT FROM AUTHOR]

Published
2016
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2. Experimental and Numerical Investigation of Combined Sensible/Latent Thermal Energy Storage for High-Temperature Applications

Author

Aldo Steinfeld, Simone Zavattoni, Andreas Haselbacher, Maurizio Barbato, Giw Zanganeh, and Lukas Geissbühler

Subjects
Packed bed, Materials science, Flow (psychology), Thermodynamics, General Medicine, General Chemistry, Thermal energy storage, Phase-change material, Diameter ratio, Chemistry, Heat transfer, Thermocline, Outflow, QD1-999, Simulation, Phase change material
Abstract

Combined sensible/latent heat storage allows the heat-transfer fluid outflow temperature during discharging to be stabilized. A lab-scale combined storage consisting of a packed bed of rocks and steel-encapsulated AlSi12 was investigated experimentally and numerically. Due to the small tank-to-particle diameter ratio of the lab-scale storage, void-fraction variations were not negligible, leading to channeling effects that cannot be resolved in 1D heat-transfer models. The void-fraction variations and channeling effects can be resolved in 2D models of the flow and heat transfer in the storage. The resulting so-called bypass fraction extracted from the 2D model was used in the 1D model and led to good agreement with experimental measurements.

Published
2015

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