A coarse-grained parcel method for heat and mass transfer simulations of spray coating processes

Madlmeir, Stefan; Radl, Stefan

doi:10.1016/j.apt.2022.103590

Cited by 11 publications

(5 citation statements)

References 72 publications

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“…346,349 Furthermore, to reduce the computational burden that hinders large-scale CFD-DEM simulations, particles can be packaged in parcels in CFD-DEM simulations. 350 In Table S19 in the Supporting Information, it is found that the CFD-DEM model is becoming increasingly attractive for wet fluidized bed simulations.…”

Section: The Biot Number (mentioning

confidence: 99%

“…The Eulerian multifluid model and the Euler–Lagrangian method, have been applied to improve the fluid flow behavior of the wet fluidized bed (Table S19 in the Supporting Information). Currently, the CFD-DEM model is optimized to include submodels for droplet description, allowing researchers to study the wet fluidized bed more thoroughly. , Furthermore, to reduce the computational burden that hinders large-scale CFD-DEM simulations, particles can be packaged in parcels in CFD-DEM simulations . In Table S19 in the Supporting Information, it is found that the CFD-DEM model is becoming increasingly attractive for wet fluidized bed simulations.…”

Section: Phase Change For Dryingmentioning

confidence: 99%

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Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Phase change is a phenomenon that has been extensively utilized in chemical engineering, energy, electronics, vehicle, and space exploration. From both the science and engineering perspectives, gaining a profound understanding of the intricacies of multiphase flow processes accompanied by heat and mass transfer due to phase change is of fundamental importance. Indeed, the computational fluid dynamics (CFD) has been increasingly applied as an effective tool to give an in-depth and efficient analysis of the phase change processes, thereby enhancing our understanding and capacity to control and optimize the phase change effects in these processes. This paper seeks to provide a comprehensive review of the utilization of CFD methodologies in the simulations of phase change flows across various applications, including temperature management, drying, separation and purification, and others. First, the CFD models at various scales that are developed to elucidate the phase change processes are summarized. Second, the noteworthy advances in the recent CFD simulation work on various phase change processes are presented, respectively. Finally, the challenges and potential prospects to facilitate the application of the phase change flow are discussed. The current review aims to offer insightful guidance for the CFD modeling of phase change processes in numerous engineering application scenarios.

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Section: The Biot Number (mentioning

confidence: 99%

Section: Phase Change For Dryingmentioning

confidence: 99%

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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“…The capillary force relates to the separation distance and surface tension of droplets. The coating mass distributions were predicted using CFD-DEM with the coarse-grained parcel method in a top-spray fluidized bed coater [27]. The abovementioned simulations indicate that CFD-DEM simulation is a suitable tool to analyze interactions of droplet-droplet and droplet-wall collisions in droplet spray coating processes.…”

Section: Introductionmentioning

confidence: 97%

A CFD-DEM Simulation of Droplets in an Airless Spray Coating Process of a Square Duct

Li,

Chen,

Hong

et al. 2024

Coatings

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The purpose of this paper is to provide a numerical simulation, taking into account the collisional interactions of droplets in an airless rotary spray coating process. The hydrodynamics of gas and droplets are simulated using the CFD-discrete element method (DEM) with the JKR contact model in an airless rotary spray coating process of a horizontal square duct. The surface energy parameter used in the JKR model is calibrated using a virtual accumulation angle test in the funnel device. Based on the distribution of accumulation angles, a suitable surface energy for wall droplets is proposed. A rational gas RNG k-ε model is suggested in accordance with the comparisons of velocities, standard deviations, and the skewness of droplet number fractions from three turbulence models. The simulations of droplet film thicknesses agree with measurements from the literature regarding the film thickness along a vertical panel. The correlations of the exit gas and droplet velocities of sprayer holes are proposed with a discharge coefficient of 0.85 for gas and 5.87 for droplets. A number index of droplets is introduced in order to measure the uniformity of droplet distributions. A low droplet number index is found at low rotational speeds, representing a more uniform distribution of droplets as the rotation speeds reduce within the square duct. The normal force between the droplet and the wall is approximately an order of magnitude larger than the droplet–wall tangential force of collisions.

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“…The first scientific work about coarse-graining heat transfer was published by ref . Recently, ref used CFD-DEM coarse-graining for a spray coating process, refs , employed coarse-graining for biomass gasification research, whereas gas–solid heat transfer was investigated in our previous work . Reference studied coarse-graining CFD-DEM fluidized bed drying by applying coarse-graining techniques for fluidized bed gas–solid heat transfer.…”

Section: Introductionmentioning

confidence: 99%

CFD-DEM Fluidized Bed Drying Study Using a Coarse-Graining Technique

de Munck,

Peters,

Kuipers

2023

Ind. Eng. Chem. Res.

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A coarse-grained parcel method for heat and mass transfer simulations of spray coating processes

Cited by 11 publications

References 72 publications

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

A CFD-DEM Simulation of Droplets in an Airless Spray Coating Process of a Square Duct

CFD-DEM Fluidized Bed Drying Study Using a Coarse-Graining Technique

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