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Wyszukujesz frazę "Diviš, Jan" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Calibration of Selected Bulk Biomaterials Parameters for DEM Simulation of Comminution Process. Case Study: Corn and Rice Grains
Autorzy:
Kruszelnicka, Weronika
Diviš, Jan
Hlosta, Jakub
Gierz, Łukasz
Žurovec, David
Powiązania:
https://bibliotekanauki.pl/articles/2206279.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
DEM
comminution
angle of repose
restitution coefficient
breakage probability
biomaterials
Opis:
Computer simulation of bulk materials behavior, including comminution and fragmentation, using DEM has been growing fast, recently. One of the important tasks to get the reliable simulation results is to provide proper materials and contact parameters, which need to be determined in a series of laboratory experiments. For comminution simulation the additional parameters describing the breakage probability and breakage functions are necessary. While some simulation parameters are available in the literature for brittle materials, valid data are lacking for biomaterials such as cereal, rice or corn grains, especially for comminution parameters. The aim of this study was to present the calibration approach and determination of materials, contact, interaction and breakage parameters for grainy biomaterials. The calibration process was done for rice and corn grains. The calibration approach consists of grains size distribution and shape characterization, friction and restitution coefficient determination, and breakage probability description. Based on the results of the experiments, the models were created in the DEM software. The result was the set of calibrated parameters for rice and corn grains.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 64--77
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of dosing tank emptying using spiral vibration
Autorzy:
Zurovec, David
Necas, Jan
Divis, Jan
Hlosta, Jakub
Zegzulka, Jiri
Urbanova, Katerina
Powiązania:
https://bibliotekanauki.pl/articles/102862.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
spiral vibrations
dosing tank
cohesive sand
drgania spiralne
zbiornik dozujący
piasek spoisty
Opis:
This article addresses the optimization of a dosing tank using a spiral harmonic motion. The dosing tank is used for ashort-term storage of cohesive sand, which is then released into a tubular mold. Originally, a solution based on the principle of wiping the material using rotary blades and brushes was used to fill the molds. However, this method was not effective enough. This solution suffered from uneven dosing as well as a loss of material. The mold filling time ranged around 20 seconds. During the course of optimization of the dosing tank, a new design of the tank was created and external energy in aform of harmonic spiral vibrations was introduced into the system. The chosen shape of the harmonic spiral motion proved to be the most suitable for continuous emptying of the cohesive sand from the dosing tank into the tubular mold in a very short time. There was also a significant elimination of material losses. It was determined that the frequency of harmonic motion affects uniform dispensing of material fromtanks.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 3; 143-149
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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