A convenient method to validate the gas flow of a CFD-CT simulation applied on a packed bed used in gas biofiltration through residence time distributions

Felipe Carreño-López, Patricio A. Moreno-Casas*, Felipe Scott, Jon Iza, José Sierra-Pallares, Raúl Muñoz, Alberto Vergara-Fernández

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this work, the validation of a Computational Fluid Dynamics (CFD) model coupled with a 3D computational tomography (CT) bed description of the gas flow field inside a packed column used for gas biofiltration was conducted using a low-cost metal oxide sensor. The validation was carried out in terms of gas residence time distribution (RTD), which was constructed from the sensor measurements using a mathematical model to filter the transient signal behavior. The coupled CFD-CT model was used to obtain the steady-state velocity field inside the packed bed by numerically solving the incompressible Navier-Stokes equations. Later, the tracer injection was simulated over the obtained velocity field by solving a transport equation for a passive scalar. Finally, the experimental and simulated RTD were compared to validate the model. The comparison between the experiments and the CFD simulations showed good agreement between both shapes of the RTD distribution with a relative difference of 4.167% for the mean RTD, denoting the potential of the proposed methodology to validate the CFD model and predict the moments of the RTD. This methodology can become a very useful tool for the validation of CFD simulations with the final purpose of studying the processes at the microscale undergoing inside packed bed biofiltration reactors.

Original languageEnglish
Article number138795
JournalChemical Engineering Journal
Volume451
DOIs
StatePublished - 1 Jan 2023

Bibliographical note

Funding Information:
The present work has been sponsored by CONICYT – Chile (National Commission for Scientific and Technological Research) (Fondecyt 1195021) and the Regional Government of Castilla y León and the European FEDER Program (CLU 2017-09 and UIC 315). F. Carreño-López, A. Vergara-Fernández, F. Scott and Patricio A. Moreno-Casas acknowledge the financial support from the grant project “Apoyo a la Formación de Redes Internacionales entre Centros de Investigación REDES190137”, CONICYT-PCI. F. Carreño-López acknowledges the financial support from the National Agency for Research and Development (ANID) / Scholarship Program / DOCTORADO NACIONAL / 2021/23220286. Additionally, we would like to kindly thank Sandra Gutierrez from Clínica Universidad de los Andes (Chile) for her help in obtaining the CT-3D images.

Funding Information:
F. Carreño-López acknowledges the financial support from the National Agency for Research and Development (ANID) / Scholarship Program / DOCTORADO NACIONAL / 2021/23220286.

Funding Information:
The present work has been sponsored by CONICYT – Chile (National Commission for Scientific and Technological Research) ( Fondecyt 1195021 ) and the Regional Government of Castilla y León and the European FEDER Program ( CLU 2017-09 and UIC 315 ).

Funding Information:
F. Carreño-López, A. Vergara-Fernández, F. Scott and Patricio A. Moreno-Casas acknowledge the financial support from the grant project “Apoyo a la Formación de Redes Internacionales entre Centros de Investigación REDES190137”, CONICYT-PCI.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Air treatment
  • Biofilters
  • Biotrickling filters
  • Gas residence times
  • Modeling
  • Packed bed

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