Jun 2026· Journal of Physics, Conference Series· Vol 3254, pp. 022013· 0 citations· 11 references
Physics
Abstract
In this study, a hot-air-based rotary reactor was designed to address the poor temperature uniformity and low thermal efficiency during tin removal from waste printed circuit boards (WPCBs). Transient computational fluid dynamics simulation was employed to evaluate the effects of fan installation, blade geometry, and the number of shovelling plates on the internal flow and temperature fields in a hot air-based rotary reactor. The optimized combination of a vertical-blade fan and four shoveling plates effectively reduced stagnant zones and maintained the drum-core temperature at around 238 °C. The internal temperature difference in the hot air-based rotary reactor decreased from 17.61 °C to 1.03 °C, and the temperature non-uniformity decreased from 4.16% to 0.22%. Pilot-scale experiments further confirmed the effectiveness of the proposed design. Most of the electronic components were detached after hot air desoldering at 240 °C for 20 min, demonstrating its excellent desoldering performance. The above results might provide a basis for structural optimization and operational guidance of rotary desoldering reactors for WPCBs.
This study employed ProCAST numerical simulation to assess and enhance the casting design of a stainless-steel CF8M pump impeller by analyzing six gating and feeding configurations. The simulations were executed at a pouring temperature of 1650 °C, an initial mould temperature of 25 °C, and an estimated filling duratio...
Mahmoud A. Essam, Noha M. Abdeltawab, A. Shash et al.· Scientific Reports· 0 citations
Flywheel energy storage systems impose high demands on the mechanical properties and structural integrity of rotors, particularly in high-speed applications. This study focuses on the numerical analysis of gravity casting of a steel rotor manufactured from low alloy 34CrMo4 steel, with the aim of identifying critical r...
Jan Růžička, Adéla Macháčková, F. Radkovský et al.· Applied Sciences· 0 citations
This study evaluates the impact of hot air inlet positioning on heat transfer efficiency within a biomass-fueled rotary drum dryer system using Computational Fluid Dynamics (CFD) simulation combined with experimental validation. Three inlet configurations - at the drum head, at one-third of the drum length, and at the...
Phu Nguu Do, M. Nguyen, Tan Trung Ho· 2026 11th International Conf...· 0 citations
The generation of municipal solid waste (MSW) is rapidly increasing. This has worsened environmental pollution and public health hazards, especially in places with poor waste management policies. This research employs finite element simulation techniques to investigate the thermo-structural response and failure behavio...
Wisdom Noweghoweman, E. K. Orhorhoro, A. Ngbeneme· African Journal of Advances...· 0 citations
This paper presents the design, numerical modeling, and experimental implementation of a sealed autoclave developed for compatibility testing of mineral thermal oil with natural rocks in packed-bed thermal energy storage (TES) systems. Delcoterm Solar E15 was selected as the heat transfer fluid (HTF) based on its poten...
Soukaina Hrifech, Khadija El Alami, A. Bendaraa et al.· 2026 6th International Confe...· 0 citations
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