Heat Transport in Starch Exposed to Ionizing Radiation: Experiment Versus Theoretical Computer Modeling.

Braşoveanu, Mirela; Oane, Mihai; Nemţanu, Monica R.

The paper deals with the experimental and theoretical study of the temperature distribution in granular starch exposed to ionizing radiation. In this respect, corn starch is irradiated by using a field of accelerated electrons of mean energy of 5.5 MeV for a period of 435 s. A sensor is placed inside the starch sample to record the temperature during irradiation and after irradiation until room temperature is reached again. From a theoretical point of view, in order to describe the temperature field, a mathematical model based on the heat equation in Cattaneo‐Vernote formalism is developed and solved by using the integral transform technique on finite domains. The relaxation time (τ0), the "hottest point," and the maximum temperature reached in the "hottest point" are determined through the proposed model. The knowledge of the thermal field inside the target sample, especially in the "hottest point," is essential in planning and optimization of the experiments that involves rigorous control of temperature in starch related irradiation applications in order to avoid the thermal runway during experiments.

IONIZING radiation; COMPUTER simulation; TEMPERATURE control; TEMPERATURE distribution; INTEGRAL transforms

Starch / Staerke, 2019, Vol 71, Issue 11/12, pN.PAG

0038-9056

Academic Journal

10.1002/star.201900147