Controlling granular segregation using modulated flow

Xiao, Hongyi; McDonald, David D.; Fan, Yunyun; Umbanhowar, Paul B.; Ottino, Julio M.; Lueptow, Richard M.

doi:10.1016/j.powtec.2017.02.050

Cited by 19 publications

(10 citation statements)

References 63 publications

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“…β‐carotene (βC) is a major provitamin A carotenoid. βC‐fortified foods have been used to prevent vitamin A deficiency in preschool children and pregnant women; unfortunately, βC is fat‐soluble and weakly dispersed in most foods (Turner et al, 2013; Xiao et al., 2017). β‐Carotene efficiently quenches oxygen and free radical formation, thereby acting as an anti‐oxidant, anti‐inflammatory and anti‐cancer agent, and reducing the risk of chronic diseases (Dimakou & Oreopoulou, 2012; Syamila et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of adding fungal β‐carotene to picual extra virgin olive oils on their physical and chemical properties

Murillo-Cruz

Chova²,

Bermejo

2021

J. Food Process. Preserv.

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Vegetable oils are prone to oxidation, which detracts from their quality and nutritional value, and β‐carotene is a major carotenoid with healthy properties. In this work, fungal β‐carotene was added to extra‐virgin oils from Picual olives in order to prevent their degradation and foster consumption of bioactive substances. The effect of β‐carotene was assessed by comparing various quality‐related physical and chemical properties of the oils in its presence and absence. The oils were also examined for their response to microwave heating and exposure to light. The fact that no substantial changes in free acidity were observed upon addition of the carotenoid suggests the absence of hydrolysis reactions in the oils. Except for free acidity, all physical and quality‐related parameters of extra virgin olive oil were altered by microwave heating and exposure to UV light. The changes, however, were less marked in βC‐enriched samples, which suggest that the carotenoid has a protective effect against degradation. Based on the results, natural antioxidants such as β‐carotene may provide an effective means for increasing the shelf‐life, nutritional value, and resistance to degradation of extra‐virgin olive oil. Novelty impact statement Adding β‐carotene to olive oil increases its nutritional value and improves oil stability against microwave heating and light exposure. Using carotenoid‐enriched olive oils as new functional foods can be useful to increase the daily intake of essential bioactive molecules through human diet, enhance the healthy properties of oils and confer them valuable nutritional assets and additional stability.

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Section: Introductionmentioning

confidence: 99%

Effect of adding fungal β‐carotene to picual extra virgin olive oils on their physical and chemical properties

Murillo-Cruz

Chova²,

Bermejo

2021

J. Food Process. Preserv.

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“…21,23 In this article, we use super-ellipsoid particle-based DEM simulations to study the segregation of length bidisperse rods in a quasi-2D one-sided bounded heap, which is a canonical geometry for studying segregating granular systems. 4,5,8,[24][25][26][27] The quasi-2D bounded heap geometry consists of two parallel plates with a narrow gap between them and two vertical walls at each end, shown schematically in Figure 1. Particles are fed onto the heap at one end and flow down the slope in a thin flowing layer.…”

Section: Introductionmentioning

confidence: 99%

Simulation and modeling of segregating rods in quasi‐2D bounded heap flow

et al. 2017

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Many products in the chemical and agricultural industries are pelletized in the form of rod-like particles that often have different aspect ratios. However, the flow, mixing, and segregation of non-spherical particles such as rod-like particles are poorly understood. Here, we use the discrete element method (DEM) utilizing super-ellipsoid particles to simulate the flow and segregation of rod-like particles differing in length but with the same diameter in a quasi-2D one-sided bounded heap. The DEM simulations accurately reproduce the segregation of size bidisperse rod-like particles in a bounded heap based on comparison with experiments. Rod-like particles orient themselves along the direction of flow, although bounding walls influence the orientation of the smaller aspect ratio particles. The flow kinematics and segregation of bidisperse rods having identical diameters but different lengths are similar to spherical particles. The segregation velocity of one rod species relative to the mean velocity depends linearly on the concentration of the other species, the shear rate, and a parameter based on the relative lengths of the rods. A continuum model developed for spherical particles that includes advection, diffusion, and segregation effects accurately predicts the segregation of rods in the flowing layer for a range of physical control parameters and particle species concentrations.

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“…The effect of various operational parameters [10][11][12] including the geometry and design [13,14], as well as material properties such as cohesion [15,16,17], particle size and density [10,18] on the homogeneities improvement of powder mixtures has been widely investigated in the past literature. In a work performed by Hajra et al [19], a method based on modifying the geometry design by locating an axially-located baffle has been proposed to hinder the density-driven segregation in a binary mixture containing cellulose acetate beads and glass beads.…”

Section: Introductionmentioning

confidence: 99%