A novel approach for numerical simulation of plant tissue shrinkage during drying

Karunasena, H.C.P., Senadeera, Wijitha, Brown, Richard J., & Gu, YuanTong (2014) A novel approach for numerical simulation of plant tissue shrinkage during drying. In Thilakarathne, B.M.K.S., Rathnayake, H.M.A.P., Champa, W.A.H., & Wasala, W.M.C.B. (Eds.) Proceedings of the International Research Symposium on Postharvest Technology, Research and Development Centre, Institute of Post Harvest Technology, Anuradapura, Sri-Lanka, pp. 130-135.

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Abstract

Drying is a key processing techniques used in food engineering which demands continual developments on advanced analysis techniques in order to optimize the product and the process. In this regard, plant based materials are a frequent subject of interest where microstructural studies can provide a clearer understanding on the fundamental physical mechanisms involved. In this context, considering numerous challenges of using conventional numerical grid-based modelling techniques, a meshfree particle based model was developed to simulate extreme deformations of plant microstructure during drying. The proposed technique is based on a particle based meshfree method: Smoothed Particle Hydrodynamics (SPH) and a Discrete Element Method (DEM). A tissue model was developed by aggrading individual cells modelled with SPH-DEM coupled approach by initializing the cells as hexagons and aggregating them to form a tissue. The model also involves a middle lamella resembling real tissues. Using the model, different dried tissue states were simulated with different moisture content, the turgor pressure, and cell wall contraction effects. Compared to the state of the art grid-based microscale plant tissue drying models, the proposed model is capable of simulating plant tissues at lower moisture contents which results in excessive shrinkage and cell wall wrinkling. Model predictions were compared with experimental findings and a fairly good agreement was observed both qualitatively and quantitatively.

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6 citations in Web of Science®
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ID Code: 74371
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: food drying, plant cells, SPH, moisture content, shrinkage
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > FOOD SCIENCES (090800)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > FOOD SCIENCES (090800) > Food Engineering (090802)
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 > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 [please consult the author]
Deposited On: 24 Jul 2014 03:41
Last Modified: 30 Aug 2015 14:15

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