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Volume 103
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Bergold, T., Illana-Mahiques, E., & Scherer, V. (2025). Tabulation as a method to accelerate intraparticle models in DEM: Thermal conduction as an example. Particuology, 103, 277-285. https://doi.org/10.1016/j.partic.2025.06.004
Tabulation as a method to accelerate intraparticle models in DEM: Thermal conduction as an example
Torben Bergold *, Enric Illana-Mahiques, Viktor Scherer
Institute of Energy Plant Technology, Ruhr-University Bochum, Universitätsstraße 150, 44780, Bochum, Germany
10.1016/j.partic.2025.06.004
Volume 103, August 2025, Pages 277-285
Received 14 February 2025, Revised 16 May 2025, Accepted 5 June 2025, Available online 16 June 2025, Version of Record 23 June 2025.
E-mail: bergold@leat.rub.de
Highlights

• Tabulation approach is developed to simulate heat conduction inside thermally thick particles.

• Two different databases are tested for two oscillating cases.

• For a similar accuracy as finite volume method, tabulation speeds up simulation by a factor of 3–10.


Abstract

Intraparticle models of thermal processes are essential in the Discrete Element Method (DEM) when particles are thermally thick. Accurately solving the intraparticle conservation equations using the finite volume method requires sufficient spatial and temporal resolution, increasing simulation cost. This short communication proposes to replace the finite volume method (FVM) by a novel tabulated model that reduces the computational effort without compromising accuracy. The look-up database is generated from a set of single-particle simulations under different boundary conditions using the FVM. To assess the capability of the tabulated model to reproduce the results of the finite volume method, another single particle case with periodic functions for the fluid temperature is simulated. Results showed that tabulation provides accurate predictions while reducing computational cost by a factor of 3–10.

Graphical abstract
Keywords
Heat conduction; Heat transfer; Tabulation; Intraparticle; DEM
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