Title: Simulation of food mastication based on discrete element method

Authors: Yujing Sun, W.L. Xu

Addresses: School of Biological and Agricultural Engineering, Jilin University, 5988 Renmin Avenue, Changchun 130025, China; School of Engineering and Advanced Technology, Massey University, Private Bag 102 904, Shore Mail Centre, Auckland, New Zealand. ' School of Engineering and Advanced Technology, Massey University, Private Bag 102 904, Shore Mail Centre, Auckland, New Zealand

Abstract: The information on mastication and food sensory properties is usually collected by recording people|s ingesting and chewing actions using electromyography, fluorography, cinephotography, videofluorography, ultrasonography, magnetic resonance imaging and so on. The process of human food mastication and swallowing is investigated by Discrete (or Distinct) Element Method (DEM) in this work. The fundamental concepts and algorithms of DEM are presented in this paper. Two initial models of human chewing and swallowing are constructed and relevant simulations are executed by PFC2D software. The first biting of rectangle food, round food, round food with a hole and the food swallowing are simulated. Changes in food reduction and jaw motion with respect to food mechanical properties and oral cavity state are observed during simulations. The movement and interaction of food particles, contact forces between the particles and teeth are analysed. Results from simulations can help understand masticatory performance and promote food product development.

Keywords: food mastication; DEM; discrete element method; distinct element method; mastication simulation; food mechanical properties; food modelling; human mastication; swallowing; human chewing; food reduction; jaw motion; oral cavity state; food particles; contact forces; masticatory performance; food product development.

DOI: 10.1504/IJCAT.2010.034723

International Journal of Computer Applications in Technology, 2010 Vol.39 No.1/2/3, pp.3 - 11

Published online: 18 Aug 2010 *

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