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Author: search.filters.author.Intasonti, SontinanSubject: search.filters.subject.Computational fluid dynamics

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    Optimization of Degradable Polylactic Acid-Based Coating Materials for Sustainable Wire Manufacturing Injection Process Using Computational Fluid Dynamics Analysis
    (2025-06-01)
    Nabudda, Kriengkrai
    ;
    Promjariyakoon, Rattanaporn
    ;
    Kitprathaung, Nustha
    ;
    Ritthong, Wirote
    ;
    Intasonti, Sontinan
    This study investigates the impact of injection angle on polylactic acid (PLA) wire coating performance, focusing on flow dynamics, heat transfer, mass density, and pressure distribution. Three angles: 30°, 45°, and 60° were assessed for their effects on coating characteristics. At 30°, the flow is smooth with minimal turbulence, ensuring consistent deposition. The 60° angle increases velocity and material penetration but risks turbulence and uneven coating. The 45° angle optimally balances material mixing and flow stability. In terms of heat transfer, the 30° angle concentrates heat near the injection point, creating a steep thermal gradient, while the 60° angle disperses heat more broadly but with lower intensity. The 45° angle ensures uniform heat distribution, improving energy efficiency. Regarding mass density, the 30° angle favours localized deposition, ideal for concentrated applications, while the 60° angle promotes broader distribution with reduced concentration. The 45° angle optimises density uniformity and maintains structural integrity. Pressure distribution follows similar trends, with 30° and 60° angles causing uneven deposition, whereas the 45° angle ensures balanced pressure distribution. In conclusion, the 45° angle offers superior performance across all parameters, providing an optimal balance of efficiency, uniformity, and structural integrity, thus enhancing PLA wire coating quality for sustainable engineering applications.
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    Optimal Design of Cooling Rooms for Mackerel Using Computational Fluid Dynamics
    (2025-06-01)
    Nabudda, Kriengkrai
    ;
    Suntivarakorn, Ratchaphon
    ;
    Artnaseaw, Apichart
    ;
    Ritthong, Wirote
    ;
    Poungthong, Pongthep
    This study utilises computational fluid dynamics (CFD) simulations to investigate airflow and temperature distributions in cold storage environments equipped with various fan and duct configurations. It assesses the effectiveness of single and dual evaporator fans (mounted at both front and rear) and front-and rear-positioned air ducts in enhancing air circulation and thermal uniformity. Results indicate that single rear-mounted fans promote localised airflow but lead to thermal stratification and stagnant zones, while front-mounted fans struggle to circulate air effectively towards the rear. Rear-positioned ducts improve air distribution but require further optimisation to address residual stratification. Dual rear-mounted evaporator fans deliver the most consistent cooling, minimising temperature variation and reducing compressor load, thus improving energy efficiency. Although dual front-mounted fans enhance circulation, they still exhibit thermal inconsistencies. The study also underscores the importance of measuring fan outlet velocity to ensure stable environmental conditions. Overall, the findings emphasise the necessity of optimised airflow strategies, appropriate fan placement, and ongoing system monitoring to achieve uniform cooling and preserve the quality of temperature-sensitive products in cold storage applications.