[理工] 化工輸送-熱傳問題
大家好 想請問幾題無因次
1. 關於內部熱傳是否要忽略 可用Bi有沒有小於0.1
為什麼大部份題目剛開始都不用先算Bi確認
還是看題目給的條件（體積，半徑就可以感覺出來？）
2.Nusselt 這個無因次
定義是由固體表面的薄膜 熱傳導與熱對流 串聯開始去導！
平常在算題目 流體熱傳導可以忽略？
因為在林隆熱傳導部份 內部熱傳導再來就與外部熱對流 串聯 解題
昨天林隆開始教熱對流後 突然困惑了起來
請高手幫我解惑 謝謝
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