A CONTINUUM MODEL FOR TRANSPORT OF METABOLIC GASSES IN PEAR FRUIT
A convection-diffusion-reaction model was developed to study gas transport in intact pears at the macroscopic level. Convective transport was assumed to be pressure driven and was modelled by means of Darcys law. The respiration of the tissue was modelled by means of Michaelis-Menten type kinetics incorporating non-competitive inhibition of CO2. All model parameters were estimated from independent measurements on disk-shaped samples. Geometrical models of pears were constructed using a machine vision system. Predicted gas exchange of whole intact fruits using the finite element method was validated successfully under steady and unsteady conditions. The higher Michaelis-Menten constant of intact fruit compared to that of small tissue samples could be attributed to the gas transport barrier properties of tissue. Also, the fruit size has a considerable effect on local respiratory gas concentrations and, hence, may contribute to the development of storage disorders such as core breakdown in pome fruit.
Q.Tri Ho Bert E.Verlinden Pieter Verboven Stefan Vandewalle Bart M.Nicola(i)
BIOSYST-MeBioS, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven, Willem de Croylaa Scientific Computing Research Group, Computer Science Dept., Katholieke Universiteit Leuven,Celestij
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）