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- W4225150521 abstract "The Discrete Element Method (DEM) is commonly used for modeling the flow of particulate materials. Unfortunately, such detailed simulations are computationally very demanding, restricting its use for industrially-scaled processes. The number of particles in a simulation can be reduced by introducing parcels (i.e., “coarse graining”), which – in essence – relies on the increase of the particle diameter for interaction calculations. However, sophisticated models are necessary to preserve the original behavior of the material when using such an approach. Our present contribution extends available coarse-graining concepts by introducing models for (i) particle–fluid mass transfer and (ii) the deposition rate of spray droplets on particles. Our mass transfer model is based on an existing model for heat transfer. For the spray deposition model, we introduce an effective particle diameter to compute the correct amount of droplets that impact particles. We show that these models can be used with confidence up to a coarse-graining level of 5, which we demonstrate for a simple-shaped fluidized bed. The models proposed by us are critical for detailed simulations of spray coating processes since they enable precise particle-droplet-air interaction modeling at low computational cost." @default.
- W4225150521 created "2022-05-01" @default.
- W4225150521 creator A5035624221 @default.
- W4225150521 creator A5039422221 @default.
- W4225150521 date "2022-06-01" @default.
- W4225150521 modified "2023-09-27" @default.
- W4225150521 title "A coarse-grained parcel method for heat and mass transfer simulations of spray coating processes" @default.
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- W4225150521 doi "https://doi.org/10.1016/j.apt.2022.103590" @default.
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