A characterization of the process of drying the corozo (Bactris guineensis) fruit behavior, performed by numerical simulation CFD was carried out. A variation of the drying process input conditions was made choosing the temperature as variable, analyzing its effects on the drying of the corozo when being implemented in the ranges between 50 °C and 85 °C with specific relative humidity conditions of 76% and drying rate of 1 m/s, for which the convective heat transfer models and phase change models were used. The curves of the drying process of the biomass were obtained for each temperature, profiled the speed and moisture loss inside the biomass. The results obtained by numerical simulation are compared with those obtained experimentally showing reliability of this practice. The drying process of the corozo can be used for its preservation as food and its use as a source of unconventional energy generation.
The drying process for "corozo" (Bactris guineensis) is performed in order to establish the values for variables such as temperature and time, while producing adequate dehydration of this type of fruit. Two temperatures values were used, 50°C and 70°C, and a gravimetric procedure was used, with a mass baseline of 100 g, with ripe fruit. The time interval used for data collection was 5 minutes. Tests were also performed to determine the water mass diffusivity inside the fruit considering the same temperature range of the main experiment. A computational validation was also done for the drying process through a computational fluid dynamics (CFD) analysis from the physical properties of the established biomass together with the process conditions, using the mass and energy conservation models and continuity in porous media. A very similar performance was obtained between experimental tests and computational simulation, reduction of the drying time by 40% for a temperature of 70 °C when compared to 50 °C.
The present research aims to analyze the kinematic and dynamic behavior of the piston ring package. The development of the research was carried out through the development of numerical simulation by means of CFD. The analysis involves the three piston rings for the development of simulations that are closer to the real conditions of the engine since most of the investigations tend to focus on the study of the compression ring only. The simulation was reinforced by the incorporation of mathematical models, which allow determining the piston kinematics, the lubrication properties as a function of temperature, contact friction, and gas leakage. For the simulation, the CAD of the piston and the connecting rod—crankshaft mechanism was carried out, taking as a reference the geometry of a diesel engine. From the results obtained, it was possible to show that the first ring exhibits considerably greater radial and axial movement compared to the second and third piston rings. Additionally, it was shown that the first and second rings tend to maintain a negative tilt angle throughout the combustion cycle, which facilitates the advancement of the combustion gases over the piston grooves. Therefore, it is necessary to use strategies so that these rings tend to maintain a positive inclination. The analysis of the pressure conditions in the second ring are 150% and 480% higher compared to the conditions present in the third ring. Due to the above, it is necessary to focus efforts on the design of the profile of this ring. The study of energy losses showed that the combination of leakage gases and friction are responsible for a mechanical loss between 6–16%. In general, the development of the proposed methodology is a novel tool for the joint analysis of the kinematic characteristics, pressure conditions, and energy losses. In this way, integrated analysis of changes caused by piston ring designs is possible.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.