本文以數值法模擬具完全分隔板的正方形密閉空間內空氣-低溫水系統自然對流熱傳。密閉空間的左鉛直壁維持8℃的等溫，右鉛直壁維持0℃的等溫，兩水平壁為絕熱邊界條件。完全分隔板將密閉空間分成空氣和低溫水兩個區域，因此有兩種情況被探討：情況1，空氣-隔板-低溫水；情況2，低溫水-隔板-空氣。考慮的參數範圍：103瑞利數Raw106與0.25無因次分隔板位置c0.75，而無因次分隔板厚度ε設為定值0.1。數值解顯示：情況2，就Raw=105而言，當分隔板位置c值從0.25增至0.75時，熱傳率增加135%。

Numerical simulation of the natural convection heat transfer in a square rectangular containing air and cold water separated by a complete partition is performed. The temperature boundary conditions are established with a prescribed hot temperature 8°C at the left vertical wall and a prescribed cold temperature 0°C at the right vertical wall. On the other hand, the two horizontal walls are adiabatic. Results have been obtained for different Rayleigh numbers (103Raw106) and location of the partition (0.25c0.75). The dimensionless thickness of the partition ε is set to be 0.1. Two cases are studied：Case I, air-partition-cold water and Case II, cold water-partition-air. Result indicates that when value of location of the partition is increased to 0.75 from 0.25 the increase in heat transfer is 135% for Raw=105 in Case II.