Modeling Coupled Transport Phenomena and Mechanical Deformation of Rice During Drying in Fluidized-Bed Dryer

Authors

  • ปรีดา ปรากฎมาก

Keywords:

Brown rice, Drying, Effective Diffusivity, Finite Element, Cracking

Abstract

The research studied the effect of the fluidized bed drying technique on drying kinetics and fissure of rice kernel (Suphan Buri 1) using hot air at drying temperature range of 85-130oC. The three-dimensional mathematical model was developed to simulate the evolutions of the moisture content, temperature and stresses within rice kernel during drying. The simulated moisture content and temperature of rice gain were favorably in agreement with experimental results. The simulation results showed that the maximum moisture and temperature gradients within rice kernel occurred at the drying times of 35 and 6 s, respectively. The moisture and temperature gradients were found to decrease with increase in drying time. The magnitude of moisture gradient was remarkably higher than the temperature gradient and thus the moisture gradient was a main cause of fissures in rice grains. The maximum stress was found near the middle region of kernel and had the value of stresses  about  118 MPa.

References

[1] C. Niamnuy, S. Devahastin, S. Soponronnarit, and G.S. Raghavan, "Modeling Coupled Transport Phenomena and Mechanical Deformation of Shrimp during Drying in a Jet Spouted Bed Dryer," Chemical Engineering Science, vol. 63, pp. 5503-5512, 2008.
[2] N. Srisang, S. Soponronnarit and S. Prachayawarakorn, "Drying of Germinated Brown Rice by Fluidized Bed Technique," Thesis, KMUTT, 2011.
[3] T. Tsukada, N. Sakai and K. Hayakawa, "Computerized Model for Strain-stress Analysis of Food Undergoing Simultaneous Heat and Mass Transfer," Journal of Food Science, vol. 56, pp. 1438-1445, 1991.
[4] P. Prakotmak, "Modeling Coupled Transport Phenomena and Mechanical Deformation of Rice during Drying in Fluidized-bed Dryer,"in Proceeding of MENETT’28, 2014.
[5] W. Yang, C.C. Jia, T.J. Siebenmorgen, T.A. Howell and A.G. Cnossen, "Intra-kernel Moisture and Temperature Response of Rice to Drying and Tempering Treaments by Finite Element Simulation," Transactions of the American Society of Agricultural Engineers, vol. 45, pp. 1037-1044, 2002.
[6] K.W. Lee and O.R. Kunze, "Temperature and Moisture Effects on Mechanical Properties of rice," The American Society of Agricultural and Biological Engineers, St. Joseph, MI., Paper No. 72-338, 1972.
[7] C.C. Jia, W. Yang, T.J. Siebenmorgen, R.C. Bautisa and A.G. Cnossen, "A Study of Rice Fissuring by Finite-element Simulation of Internal Stresses Combined with High-speed Microscopy Imaging of Fissure Appearance," Transaction of the American Society of Agricultural Engineers, vol. 45(3), pp. 741-749, 2002.

Downloads

Published

2020-06-19

How to Cite

[1]
ปรากฎมาก ป. ., “Modeling Coupled Transport Phenomena and Mechanical Deformation of Rice During Drying in Fluidized-Bed Dryer”, Eng. & Technol. Horiz., vol. 33, no. 2, pp. 42–48, Jun. 2020.

Issue

Vol. 33 No. 2 (2016): april -june

Section

Research Articles

License

The published articles are copyrighted by the School of Engineering, King Mongkut's Institute of Technology Ladkrabang.

The statements contained in each article in this academic journal are the personal opinions of each author and are not related to King Mongkut's Institute of Technology Ladkrabang and other faculty members in the institute.
Responsibility for all elements of each article belongs to each author; If there are any mistakes, each author is solely responsible for his own articles.