A particle-based micromechanics approach to simulate structural changes of plant cells during drying

Karunasena, H.C.P., Senadeera, Wijitha, Gu, YuanTong, & Brown, Richard J. (2012) A particle-based micromechanics approach to simulate structural changes of plant cells during drying. In Gu, YuanTong & Saha, Suvash C. (Eds.) Proceedings of 4th International Conference on Computational Methods (ICCM 2012), Crowne Plaza, Gold Coast, Australia.

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Abstract

This paper is concerned with applying a particle-based approach to simulate the micro-level cellular structural changes of plant cells during drying. The objective of the investigation was to relate the micro-level structural properties such as cell area, diameter and perimeter to the change of moisture content of the cell. Model assumes a simplified cell which consists of two basic components, cell wall and cell fluid. The cell fluid is assumed to be a Newtonian fluid with higher viscosity compared to water and cell wall is assumed to be a visco-elastic solid boundary located around the cell fluid. Cell fluid is modelled with Smoothed Particle Hydrodynamics (SPH) technique and for the cell wall; a Discrete Element Method (DEM) is used. The developed model is two-dimensional, but accounts for three-dimensional physical properties of real plant cells. Drying phenomena is simulated as fluid mass reductions and the model is used to predict the above mentioned structural properties as a function of cell fluid mass. Model predictions are found to be in fairly good agreement with experimental data in literature and the particle-based approach is demonstrated to be suitable for numerical studies of drying related structural deformations. Also a sensitivity analysis is included to demonstrate the influence of key model parameters to model predictions.

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ID Code: 55471
Item Type: Conference Paper
Refereed: Yes
Keywords: Smoothed Particle Hydrodynamics, SPH, Mesh free, Particle Methods, Plant cell models, Food drying, Cell micro mechanics
ISBN: 9781921897542
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Please consult the author.
Deposited On: 11 Dec 2012 03:42
Last Modified: 27 Aug 2015 07:44

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