Taher, MayafMahmood, Raid2026-02-172026-02-172025Taher, Mayaf. Horizontal Biomass Gasifier in Zakho: Computational Guide and Investigation / Mayaf Taher, Raid Mahmood // Mechanics and Advanced Technologies. – 2025. – Vol. 9, No. 3(106). – P. 342–350. – Bibliogr.: 25 ref.https://ela.kpi.ua/handle/123456789/78834The horizontal biomass gasifier represents a promising and sustainable solution for addressing both the growing energy needs and environmental challenges in Zakho City, Iraq. This study explores the utilization of locally available biomass waste to produce clean, renewable energy through a horizontal burner gasifier system. By converting organic waste into combustible gas, the system offers a practical pathway toward reducing pollution and mitigating the environmental impact of waste accumulation. The primary goal of this research is the development, validation, and optimization of a computational model capable of accurately predicting the thermal and fluid dynamics of a horizontally configured gasifier under local operating conditions. Using Computational Fluid Dynamics (CFD) simulations in ANSYS Fluent 2024 R2, the study investigates combustion dynamics, temperature distribution, flow behavior, and heat transfer within the gasifier. The model was constructed based on actual geometry, fuel properties, and pressure-driven boundary conditions, ensuring realistic physical representation. A mesh-independence study confirmed numerical stability, while turbulent flow and combustion were modeled using the standard k–ε and eddy-dissipation approaches. Validation against published experimental data demonstrated excellent agreement, with less than 6 % deviation from reported results. Parametric optimization revealed that an air flow rate of 28–32 m³/h yields a maximum temperature of approximately 1450 °C and a thermal efficiency near 91 %, establishing the optimum operational range for this configuration. The horizontal orientation exhibited more uniform temperature gradients and improved mixing compared to vertical systems. This revised investigation not only strengthens the physical and computational understanding of biomass gasification in horizontal systems but also provides a robust modeling foundation for future 3D simulations and experimental validation, supporting broader adoption of biomass-based renewable energy technologies in similar regions.enBiomass GasifierComputational Fluid Dynamics (CFD)Renewable EnergyCombustion SimulationThermal EfficiencyWaste-to-Energyгазифікатор біомасиобчислювальна гідродинаміка (CFD)відновлювана енергетикамоделювання горіннятеплова ефективністьперетворення відходів в енергіюArticleP. 342–350https://doi.org/10.20535/2521-1943.2025.9.3(106).330530536.24:532.517.40009-0004-6770-26020000-0002-3237-9487