Fire Instructor Demonstrates the Stack Effect in Action
1:00
Fire Instructor Demonstrates the Stack Effect in Action
382 viewsMar 26, 2023
YouTubeOpen Phylum
Explaining Everything ™ on Instagram: "a chimney works using principles of convection and air pressure, often called the stack effect. The Mechanics of a Chimney Hot Air Rises: The fire within a fireplace heats the air and gases, making them less dense than the surrounding cooler air. This natural buoyancy causes the hot air to rise up the vertical chimney passage. Pressure Difference (Draft): As the hot air and smoke rise and exit the top, a low-pressure zone is created at the base of the chimn
0:16
Explaining Everything ™ on Instagram: "a chimney works using principles of convection and air pressure, often called the stack effect. The Mechanics of a Chimney Hot Air Rises: The fire within a fireplace heats the air and gases, making them less dense than the surrounding cooler air. This natural buoyancy causes the hot air to rise up the vertical chimney passage. Pressure Difference (Draft): As the hot air and smoke rise and exit the top, a low-pressure zone is created at the base of the chimn
17.4K views4 months ago
Instagramexplaining.everything__
UNIVERSE | SCIENCE | TECHNOLOGY on Instagram: "a chimney works using principles of convection and air pressure, often called the stack effect. The Mechanics of a Chimney Hot Air Rises: The fire within a fireplace heats the air and gases, making them less dense than the surrounding cooler air. This natural buoyancy causes the hot air to rise up the vertical chimney passage. Pressure Difference (Draft): As the hot air and smoke rise and exit the top, a low-pressure zone is created at the base of t
0:16
UNIVERSE | SCIENCE | TECHNOLOGY on Instagram: "a chimney works using principles of convection and air pressure, often called the stack effect. The Mechanics of a Chimney Hot Air Rises: The fire within a fireplace heats the air and gases, making them less dense than the surrounding cooler air. This natural buoyancy causes the hot air to rise up the vertical chimney passage. Pressure Difference (Draft): As the hot air and smoke rise and exit the top, a low-pressure zone is created at the base of t
32.8K views4 months ago
Instagramexplainingscience_
Stack Em Up! . . . #firefighter #fire #firefighters #firedepartment #fireman #feuerwehr #firetruck #firefighting #rescue #bomberos #ems #firerescue #paramedic #police #firefighterlife #firstresponders #firedept #fireservice #gym #fitness #workout #fit #fitnessmotivation #bodybuilding #motivation #gymmotivation #training #gymlife #muscle | Francis Coleman
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Stack Em Up! . . . #firefighter #fire #firefighters #firedepartment #fireman #feuerwehr #firetruck #firefighting #rescue #bomberos #ems #firerescue #paramedic #police #firefighterlife #firstresponders #firedept #fireservice #gym #fitness #workout #fit #fitnessmotivation #bodybuilding #motivation #gymmotivation #training #gymlife #muscle | Francis Coleman
7.8K views11 months ago
FacebookFrancis Coleman
Explaining How on Instagram: "Chimneys operate on the principle of natural draft, also known as the stack effect. Heat from a fire (or other combustion source) warms the air within the chimney, making it less dense and causing it to rise, pulling fresh air into the combustion chamber. Follow us @instaascience #chimney #combustion #explore #mechanism, know how, demonstration, Chimneys, fire, fluid mechanics, air, wind, explanation"
Explaining How on Instagram: "Chimneys operate on the principle of natural draft, also known as the stack effect. Heat from a fire (or other combustion source) warms the air within the chimney, making it less dense and causing it to rise, pulling fresh air into the combustion chamber. Follow us @instaascience #chimney #combustion #explore #mechanism, know how, demonstration, Chimneys, fire, fluid mechanics, air, wind, explanation"
29.4K viewsApr 22, 2025
Instagramexplaining.how
The stack effect and how heat creates self-driven airflow
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The stack effect and how heat creates self-driven airflow
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🔥【大樓火災，殺人的不是火，而是“會跑的煙”】 ——3 分鐘讓你失去逃生力的真相（煙囪效應，Stack effect） 你以為火災危險的是火？ ❌ 錯。 真正奪命的是： 「煙囪效應＋毒氣＋熱衝擊＋迷路＋恐慌短路」 🌪️ 1. 煙囪效應：煙比你還會跑 大樓火災時，熱煙像被吸上去一樣往上狂衝。 📈 速度可達 2–5 m/s 📌 樓梯間、電梯井＝巨型煙囪 🔥 樓越高反而越危險。 ☠️ 2. 一口煙＝化學地獄 最致命的不是黑煙，而是毒氣： • CO 一氧化碳：搶走血紅素 → 明明有氧卻像缺氧 • HCN 氰化氫：塑膠燒出來 → 細胞瞬間「無法用氧」 ⚠️ 80–90% 火災死亡者血中同時出現 CO HCN 🔥 3. 熱衝擊比燒傷更快奪命 • 60°C 空氣吸 1 分鐘就會昏 • 150°C 兩口氣道直接燒壞 🔥 天花板 700°C，但地面 40°C → 要貼地爬 🌫️ 4. 濃煙 2 分鐘讓你完全迷路 視線瞬間變黑 → 出口、樓梯全部消失。 研究：70% 的人會跑回火源方向 真正的死因常是——迷失方向。 🧠 5. 火災時大腦會短路 恐懼暴衝，判斷力關機： 🚫 跑去廁所 🚫
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