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    Wyświetlanie 1-7 z 7
    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:
    Impact of chemical and physical properties on flowability characteristics of corn distillers dried grains with solubles
    Autorzy:
    Pekel, A.Y.
    Calik, A.
    Kuter, E.
    Alatas, M.S.
    Oklen, S.B.
    Kizil, A.
    Bulat, M.
    Cengiz, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082879.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    angle of repose
    bulk density
    compressibility
    distillers dried grains with solubles
    flowability
    Opis:
    The influence of the physical and chemical composition of corn distillers dried grains with solubles on its flowability was evaluated in the current study. The samples were evaluated for angle of repose, compressibility, Hausner ratio, tapped density, bulk density, mean bulk density, colour and nutrient content. PROC CORR and REG procedures were used to determine correlations. The ether extract was negatively correlated with crude protein and redness (a*), while crude protein was negatively correlated with yellowness (b*). Acid detergent fibre and neutral detergent fibre were negatively correlated with a* and positively correlated with lightness (L*), respectively. Compressibility showed a negative correlation with bulk density. Bulk density, tapped density and mean bulk density did not impact the angle of repose. The angle of repose was positively correlated with the compressibility and Hausner ratio. Apart from the correlation between acid detergent fibre and tapped density, the angle of repose and other physical parameters were not affected by the nutrient composition of the distillers dried grains with solubles samples. In conclusion, the results of this study indicate that nutrient composition has little influence over the flowability of distillers dried grains with solubles but compressibility and the Hausner ratio can be used to predict the potential flow characteristics of corn distillers dried grains with solubles.
    Źródło:
    International Agrophysics; 2020, 34, 2; 195-202
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of moisture on external friction coefficient and basic physical properties of Astoria variety wheat grain
    Autorzy:
    Markowska, A.
    Warechowska, M.
    Warechowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298369.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    wheat grain
    angle of repose
    tilting box method
    moisture content
    coefficient of external friction
    Opis:
    This paper analyzed the effect of moisture content on selected physical properties of Astoria variety wheat grain using six levels of grain moisture content (14%, 16%, 18%, 20%, 22% and 24%). The following were determined for each level of moisture content: angle of repose, static angle of repose (SAR), bulk density and thousand kernel weight. The friction coefficients for four different construction materials (CEF) were also determined: acid-resistant steel, wear-resistant steel, plastic (PPLD) and rubber. It was found that an increasing moisture content in grains was accompanied by an increase in the thousand kernel weight, angle of repose, SAR, as well as the CEF against each of the surfaces used in the study. The highest value of the CEF was recorded for a rubber surface (0.782) and the smallest was for a polypropylene surface (0.443). The highest values of the angle of repose and the SAR were recorded for the grain with the highest moisture content: 37.15o and 39.44o, respectively. An increase in the moisture content in kernels reduced their bulk density from 79.870 kg · hl–1 (moisture content: 14%) to 68.783 kg · hl–1 (moisture content 24%).
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2016, 19(1); 17-26
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of external factors on hazards in the transport processes of soybean meal
    Autorzy:
    Drzewieniecka, Beata
    Drzewieniecki, Jan
    Blatnický, Miroslav
    Powiązania:
    https://bibliotekanauki.pl/articles/27315923.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    śruta sojowa
    wilgotność
    gęstość
    kąt usypu
    porowatość
    soybean meal
    humidity
    density
    angle of repose
    porosity
    Opis:
    The influence of external factors on changes in the soybean meal quality features has an important meaning in the emergence of hazards during the transport processes of this cargo. Soybean meal is one of the most frequently used components of fodder mixtures. Due to its inherent properties, it is classified as special cargoes. Maintaining the quality of soybean meal during transport processes depends on storage, handling and transport conditions. The main external factor included in the study was humidity. Transport-technological quality features were distinguished: kinetic angle of repose, size of particles, bulk density, porosity. The article presents the results of research on soybean meal and its separated fractions. There was presented humidity influence on changes in significant features for this cargo. Type and range of changes in the distinguishing features of soybean meal were determined in the given stages of the transport chain under the influence of humidity. The risk was assessed in the transport processes of soybean meal. A correlation was determined between changes of individual features and water content in soybean meal changing as a result of air humidity. It was found that humidity of the ambient air in which transport processes occur and size of grain particles of soybean meal have a significant impact on changes in transport-technological quality features.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 301--307
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Buckwheat Product Properties for Discrete Element Model (DEM) Simulation
    Ocena właściwości produktów z gryki dla symulacji metodą elementów dyskretnych (DEM)
    Autorzy:
    Jezerska, Lucie
    Zidek, Martin
    Zegzulka, Jiri
    Palkovska, Barbora
    Powiązania:
    https://bibliotekanauki.pl/articles/318565.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    produkty rolne
    gryka
    symulacja DEM
    płynność
    kąt spoczynku
    agriculture products
    buckwheat
    DEM simulations
    flowability
    angle of repose
    Opis:
    The paper deals with various types of buckwheat products (Fagopyrum esculentum Moench), which have been determined with mechanical and physical properties in order to provide useful data for engineers to design structures of used equipment, harvesting and other processing technologies. Buckwheat is currently a well-sought-after food in the field of healthy nutrition, especially because of its high fiber content, iron and potassium. Among the tested samples were, for example, buckwheat hazelnuts, chips, flakes and others. In the above mentioned, the parameters of the linear dimensions, the Carrs index, the Hausner ratio and the flow rate were measured and compared. The influence of geometric parameters of buckwheat products was determined on mechanical and physical properties. The first results showed that the set parameters were statistically different for each type of buckwheat. On the basis of measured data, a simulation of the flow of a specific buckwheat sample was performed. The discrete element (DEM) method used for this purpose appears to be an appropriate tool for transporting these agricultural products.
    Artykuł dotyczy różnych rodzajów produktów z gryki (Fagopyrum esculentum Moench), które zostały określone za pomocą właściwości mechanicznych i fizycznych w celu dostarczenia inżynierom przydatnych danych do projektowania struktur używanych urządzeń, zbiorów i innych technologii przetwarzania. Gryka jest obecnie popularnym pożywieniem w dziedzinie zdrowego żywienia, szczególnie ze względu na wysoką zawartość błonnika, żelaza i potasu. Wśród badanych próbek były orzechy laskowe, gryka, chipsy, płatki i inne. Zmierzono i porównano parametry wymiarów liniowych, wskaźnik Carrsa, współczynnik Hausnera i natężenie przepływu. Określono wpływ parametrów geometrycznych produktów z gryki na właściwości mechaniczne i fizyczne. Wyniki wykazały, że zmierzone i założone parametry były statystycznie różne dla każdego rodzaju gryki. Na podstawie zmierzonych danych przeprowadzono symulację przepływu określonej próbki gryki. Zastosowana w tym celu metoda elementów dyskretnych (DEM) wydaje się odpowiednim narzędziem do opisu transportu tych produktów rolnych.
    Źródło:
    Inżynieria Mineralna; 2019, 21, 1/2; 155-158
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Handling and transportation properties of rapeseed biomass as affected by particle size
    Autorzy:
    Bojanowska, Milena
    Powiązania:
    https://bibliotekanauki.pl/articles/29521042.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    rapeseed meal
    rapeseed cake
    canola
    biomass
    agricultural commodities
    bulk storage
    flowability
    logistics vulnerability
    particle size
    angle of repose
    porosity
    bulk density
    agricultural bulk solids
    Opis:
    Rapeseed by-products of seeds de-oiling, particularly expellers and post-extracted meal, are currently considered an important biomass that can be used as an alternative energy source, either in raw form or after conversion to biochar. Rapeseed biomass represents a difficult-to-handle cargo, mainly due to its sensitivity to mechanical, climatic, and biological impacts, as well as its dusty nature. This study aims to determine the physical properties of rapeseed meals and their fractions. Morphological and chemical features of six particle sets are investigated in order to explain the variation in their physical properties having importance in handling and transportation processes. The true density of fractions increases when the particle size decreases due to the diminishing quantitative share of seed coats. No correlation is observed between true and bulk densities, as the particle shape, surface sculpture, and adhesion affect the mutual particle arrangements. Along with a decrease in the particle size from 0.4 mm, a rapid decrease in the flowability is observed. The tendency of the finest dust (d < 0.075 mm) to form agglomerated complexes causes its lower bulk density, higher porosity, and higher angles of repose in comparison to coarse dust (0.075–0.4 mm). It is concluded that a relatively low tendency to free flowing of natural RSM is mainly caused by its wide-ranging particle size distribution and their geometry differentiation, which facilitate mutual particle interlockings. The known cases of blockages of silos, bins, hoppers, and transfer chutes may be mainly caused by the powder fractions (< 0.2 mm), with a much lower flowability than other particles.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2023, 74 (146); 5-15
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical properties of seeds of the selected oil plants
    Właściwości fizyczne nasion wybranych roślin oleistych
    Autorzy:
    Krajewska, M.
    Ślaska-Grzywna, B.
    Andrejko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/94042.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    oil plants
    seeds
    MTS
    angle of slide
    angle of repose
    tap density
    bulk density
    compressive resistance
    roślina oleista
    nasiona
    kąt usypu
    kąt zsypu
    gęstość utrzęsiona
    gęstość usypowa
    wytrzymałość na ściskanie
    Opis:
    The paper examines the selected physical properties of seeds of 8 plants used in agri-food processing industry. These are: winter rapeseed (Brassica napus L.) Adriana cultivar, sesame (Sesamumindicum L.), common flax (Linum usitatissimum L.) Luna cultivar, husked sunflower (Helianthus L.) (country of origin – Bulgaria), hemp (Cannabis sativa L.) Benikocultivar, blue poppy (Papaver somniferum L.) Major cultivar, garden cress (Lepidium sativum L.), black caraway (Nigella Sativa L.). In the research material we determined the following: mass of thousand seeds (MTS), piling angle and angle of repose, tap and bulk density and compressive resistance of single seeds. Some seeds from the selected plant species differed with shape and size. Thus, the results determining the physical properties were varied.
    W pracy zbadano wybrane właściwości fizyczne nasion 8 roślin wykorzystywanych w przetwórstwie rolno-spożywczym, takich jak: rzepak ozimy (Brassica napus L.) odmiany Adriana, sezam indyjski (Sesamum indicum L.), len zwyczajny (Linum usitatissimum L.) odmiany Luna, słonecznik łuskany (Helianthus L.) (kraj pochodzenia – Bułgaria), konopie siewne (Cannabis sativa L.) odmiany Beniko, mak niebieski (Papaver somniferum L.) odmiany Major, rzeżucha ogrodowa (Lepidium sativum L.), czarnuszka siewna (Nigella Sativa L.). W materiale badawczym oznaczono: masę 1000 nasion (MTS), kąt zsypu i usypu nasion, gęstość utrzęsioną i usypową nasion oraz wytrzymałość pojedynczych nasion na ściskanie. Niektóre nasiona spośród wybranych gatunków roślin różniły się między sobą zarówno kształtem jak i wielkością, stąd też wyniki oznaczeń właściwości fizycznych były zróżnicowane.
    Źródło:
    Agricultural Engineering; 2016, 20, 1; 69-77
    2083-1587
    Pojawia się w:
    Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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