Abstract
In pursuit of sustainable resource utilization on the Moon, this paper delves into modeling and characterization of particle size distribution (PSD) of lunar regolith simulants in an electrostatic system. A prototype electrostatic sieve was built and tested with four sample simulants mirroring properties of lunar mare and highland regolith. An alternating four-phase (90 degrees, 180 degrees, 270 degrees, 360 degrees) traveling square-wave was utilized for particle-directed transport to model the diverse trajectories of the particles. Numerically, we scrutinized how the distribution functions of the particles are manifested as the electrostatic field propagates, with a focus on three distinct particle ranges (< 105, 105–250, 250–500 µm) of four simulants. Results indicated considerable influence of sorting mechanism and control parameters on electrostatic sieve's operation. These parameters encompass column inclination angles (10 degrees, 15 degrees, 20 degrees) and port length (from inlet 10 to 50 cm) at different excitation frequencies (10, 15, 20 Hz) of power source. We optimized parameters in fitting experimental data and successfully identified the movement of particles under electrostatic field at an average feed rate of 0.18 kg/h (0.05 g/s); however, the existing circular system was ineffective and unable to facilitate sorting and separation of the lunar simulant particles. Overall, the results indicate that while our electrostatic sieve instruments are efficient in moving the regolith simulant particles, its design and operation should be further modified for simultaneous transportation and separation of the particles.
Recommended Citation
A. Al Moinee et al., "Electrostatic Sorting of Lunar Regolith Simulants for Sustainable Resource Utilization: Modeling and Characterization of Particle Size Distribution," Earth and Space 2024: Engineering for Extreme Environments - Proceedings of the 19th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, pp. 68 - 83, American Society of Civil Engineers, Jan 2024.
The definitive version is available at https://doi.org/10.1061/9780784485736.007
Department(s)
Civil, Architectural and Environmental Engineering
Second Department
Mechanical and Aerospace Engineering
Third Department
Materials Science and Engineering
Fourth Department
Chemical and Biochemical Engineering
Keywords and Phrases
Electrostatic sieve; Extraterrestrial environments; Lunar regolith; Size distribution modeling; Sustainable resource utilization
International Standard Book Number (ISBN)
978-078448573-6
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Society of Civil Engineers, All rights reserved.
Publication Date
01 Jan 2024
Included in
Ceramic Materials Commons, Chemical Engineering Commons, Curriculum and Instruction Commons, Educational Administration and Supervision Commons, Educational Assessment, Evaluation, and Research Commons, Educational Leadership Commons, Educational Methods Commons, Mechanical Engineering Commons, Space Habitation and Life Support Commons, Space Vehicles Commons, Structures and Materials Commons
