2026-04-17T09:36:58Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/82622024-01-10T01:05:32Zcom_10259_6229com_10259_4534com_10259.4_106com_10259_2604col_10259_6230
Repositorio Institucional de la Universidad de Burgos
author
Carpio, Ana
author
Cebrián de Barrio, Elena
author
Vidal, Perfecto
2024-01-09T11:31:40Z
2024-01-09T11:31:40Z
2019
0020-7462
http://hdl.handle.net/10259/8262
10.1016/j.ijnonlinmec.2018.10.012
Biofilms are bacterial aggregates encased in a self-produced polymeric matrix which attach to moist surfaces and are extremely resistant to chemicals and antibiotics. Recent experiments show that their structure is defined by the interplay of elastic deformations and liquid transport within the biofilm, in response to the cellular activity and the interaction with the surrounding environment. We propose a poroelastic model for elastic deformation and liquid transport in three dimensional biofilms spreading on agar surfaces. The motion of the boundaries can be described by the combined use of Von Kármán type approximations for the agar/biofilm interface and thin film approximations for the biofilm/air interface. Bacterial activity informs the macroscopic continuous model through source terms and residual stresses, either phenomenological or derived from microscopic models. We present a procedure to estimate the structure of such residual stresses, based on a simple cellular automata description of bacterial activity. Inspired by image processing, we show that a filtering strategy effectively smooths out the rough tensors provided by the stochastic cellular automata rules, allowing us to insert them in the macroscopic model without numerical instability.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Biofilm
Poroelastic
Von Kármán
Thin film
Cellular automata
Total variation based filter
Biofilms as poroelastic materials
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/8262/1/Carpio-ijnm_2019.pdf
File
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application/pdf
Carpio-ijnm_2019.pdf