Numerical Calculation Fvalue and Lethality of Nonnewtonian Food Fluid During Sterilization Based on Can Geometry

Amount of heat transfer temperature was stimulated in the slowest heating zone of 3.5% starch dispersion during canning sterilization with 10% headspace. the computational fluid dynamics software comsol 4.1 was used and governing equations for energy, momentum, and continuity were computed using a finite volume method. the effect of container geometry (cylinders with 6*10cm and 10*6cm dimensions, and cones with 10 cm height and 5 cm radius on 0 and 180° position) on heat penetration parameter (j) and microbial lethality (l) in slowest heating point were investigated. the temperature of the slowest heating zone was monitored by a thermocouple and then compared with the predicted temperature by software. it was determined that coneshaped container had the fastest heat transfer during sterilization. also, container geometry has a significant effect on slowest heating zone shape, position, final temperature, j, l, and fvalue.

Numerical Calculation Fvalue and Lethality of NonNewtonian Food Fluid during Sterilization based on Can Geometry

Amount of heat transfer temperature was stimulated in the slowest heating zone of 3.5% starch dispersion during canning sterilization with 10% headspace. The computational fluid dynamics software COMSOL 4.1 was used and governing equations for energy, momentum, and continuity were computed using a finite volume method. The effect of container geometry (cylinders with 6*10cm and 10*6cm dimensions, and cones with 10 cm height and 5 cm radius on 0 and 180° position) on heat penetration parameter (j) and microbial lethality (L) in slowest heating point were investigated. The temperature of the slowest heating zone was monitored by a thermocouple and then compared with the predicted temperature by software. It was determined that coneshaped container had the fastest heat transfer during sterilization. Also, container geometry has a significant effect on slowest heating zone shape, position, final temperature, j, L, and Fvalue.