Szczegóły publikacji
Opis bibliograficzny
Influence of wall material and vacuum conditions on lunar regolith flow stability in a rotating drum / Filip WYLĘGAŁA, Tadeusz UHL // Acta Astronautica ; ISSN 0094-5765 . — 2026 — vol. 249 pt. A, s. 48–60. — Bibliogr. s. 59–60, Abstr. — Publikacja dostępna online od: 2026-07-10
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 169283 |
|---|---|
| Data dodania do BaDAP | 2026-07-31 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.actaastro.2026.07.006 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Acta Astronautica |
Abstract
This study quantifies how wall material selection and vacuum conditions jointly affect the flow stability of a lunar regolith simulant in a rotating drum. Understanding these interactions is critical for future lunar infrastructure that will process and handle regolith for In-Situ Resource Utilization (ISRU). Five wall materials-smooth PETG, roughened PETG, PTFE, aluminum, and copper-were tested at 2, 6, and 12 rpm under atmospheric pressure and high vacuum ((Formula presented) torr). Flow behavior was characterized by five complementary metrics: mean dynamic surface angle, angle stability coefficient of variation, mask compactness factor, 95th-percentile pile height, and normalized avalanche frequency, all derived from automated video segmentation and robust line fitting. Vacuum exposure induced an 8%–22% increase in mean surface angles for PETG-based surfaces, whereas angle stability improved by 26%–47% across most materials at low rotation speeds. Compactness increased under vacuum for all materials, with aluminum showing a 27% enhancement. Copper exhibited an anomalous response-marginally reduced vacuum angles but 47% improved stability-consistent with rapid charge redistribution on conductive surfaces. Material effects explained more than 80% of the total variance for geometric and angle-based metrics across all conditions, as confirmed by analysis of variance. Vacuum effects were most pronounced at low rotation speeds, consistent with adhesive forces dominating under quasi-static conditions. These findings demonstrate that atmospheric characterization data may not reliably extrapolate to lunar surface operations.
