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Thursday 06 August 2026 12:17:03 GMT
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![The Stack Effect (or chimney effect) is a fluid dynamics phenomenon where temperature-driven density differences create a self-sustaining airflow, enabling chimneys to vent smoke without mechanical assistance. Unlike forced ventilation (fans...), the Stack Effect relies solely on buoyancy forces from heated air. As warm combustion gases rise, they reduce pressure at the chimney base, drawing in fresh air to sustain combustion while expelling exhaust upward. The effect lays its principle on hydrostatic pressure imbalance: • Hot air inside the chimney becomes less dense, creating an upward buoyant force. • The pressure differential drives flow, with taller chimneys enhancing the effect. • Bernoulli’s principle further accelerates gases at the chimney exit, improving draft efficiency. It is fundamental in energy efficiency by enabling passive ventilation in buildings and industrial systems. It also supports environmental safety by aiding combustion and pollution dispersion, while influencing natural processes like volcanic venting, wildfire plumes, and ocean currents. This principle connects engineering, environmental health, and Earth's dynamic systems. --- 💡 Learn More: What is the Chimney Effect or Stack Effect? - Bright Hub [Source] (🎼 Viliam Lane - Particles) (🎞 光头强老师/RN) ( (✍️ Description) 1. ASHRAE. (2020). ASHRAE handbook — HVAC systems and equipment. American Society of Heating, Refrigerating and Air-Conditioning Engineers. 2. Etheridge, D. (2015). Natural ventilation of buildings: Theory, measurement and design --- .sbmedia 🪐🔭](/video/cover/7634089117109718286.webp)
