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Modeling the Transport and Interaction of Paperboard ”Confetti” in Pipes

Willemo, Ludvig LU (2024) MVKM01 20232
Department of Energy Sciences
Abstract
During the production of Tetra Pak’s packaging material, holes are cut for straws and caps, generating paperboard scraps known as confetti. These scraps must be removed from the machinery to prevent build-up and potential blockages. To design efficient extraction systems, experiments and simulations are employed to understand the phenomena of confetti transport. Confetti are introduced into a simplified extraction geometry and their movement is captured using high-speed photography. The obtained data, extracted by computer vision scripting, contributes to the evaluation of joint fluid-structure interaction models simulated using the Star-CCM+ computational fluid dynamics software.

The analysis reveals that confetti transport exhibits... (More)
During the production of Tetra Pak’s packaging material, holes are cut for straws and caps, generating paperboard scraps known as confetti. These scraps must be removed from the machinery to prevent build-up and potential blockages. To design efficient extraction systems, experiments and simulations are employed to understand the phenomena of confetti transport. Confetti are introduced into a simplified extraction geometry and their movement is captured using high-speed photography. The obtained data, extracted by computer vision scripting, contributes to the evaluation of joint fluid-structure interaction models simulated using the Star-CCM+ computational fluid dynamics software.

The analysis reveals that confetti transport exhibits chaotic characteristics, as seemingly identical experiments and simulations result in unique trajectories through the extraction geometry. Although the model cannot predict individual confetti trajectories, these trajectories are similar to those observed in the experiments. When evaluating the average speeds of confetti within regions of interest, the range of averages consistently increases downstream, accompanied by an increasing overestimation of velocities. This overestimation is likely due to unaccounted losses from an imperfect contact model, which also leads to identical simulations producing different outcomes. Despite its limitations, the model offers valuable insights into confetti transport and serves as a foundation for further development by Tetra Pak, supplemented by the knowledge gained from its construction. (Less)
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author
Willemo, Ludvig LU
supervisor
organization
course
MVKM01 20232
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Fluid-structure interaction (FSI), Computational fluid dynamics (CFD), Finite element analysis (FEA), Image analysis, Paperboard, Pipe debris
report number
LUTMDN/TMHP-24/5562-SE
ISSN
0282-1990
language
English
id
9150471
date added to LUP
2024-04-10 15:54:57
date last changed
2024-04-10 15:54:57
@misc{9150471,
  abstract     = {{During the production of Tetra Pak’s packaging material, holes are cut for straws and caps, generating paperboard scraps known as confetti. These scraps must be removed from the machinery to prevent build-up and potential blockages. To design efficient extraction systems, experiments and simulations are employed to understand the phenomena of confetti transport. Confetti are introduced into a simplified extraction geometry and their movement is captured using high-speed photography. The obtained data, extracted by computer vision scripting, contributes to the evaluation of joint fluid-structure interaction models simulated using the Star-CCM+ computational fluid dynamics software.

The analysis reveals that confetti transport exhibits chaotic characteristics, as seemingly identical experiments and simulations result in unique trajectories through the extraction geometry. Although the model cannot predict individual confetti trajectories, these trajectories are similar to those observed in the experiments. When evaluating the average speeds of confetti within regions of interest, the range of averages consistently increases downstream, accompanied by an increasing overestimation of velocities. This overestimation is likely due to unaccounted losses from an imperfect contact model, which also leads to identical simulations producing different outcomes. Despite its limitations, the model offers valuable insights into confetti transport and serves as a foundation for further development by Tetra Pak, supplemented by the knowledge gained from its construction.}},
  author       = {{Willemo, Ludvig}},
  issn         = {{0282-1990}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Modeling the Transport and Interaction of Paperboard ”Confetti” in Pipes}},
  year         = {{2024}},
}