本文研究在多孔質中放置一塊前緣嵌有線熱源的水平絕熱板，探討結合線熱源熱傳(即壁煙流)與等質通量壁質傳的混合對流。
首先利用溫度與濃度邊界層之量階分析的結果，提出在純粹自然對流時的熱傳與質傳浮力比參數r，以及引進描述自然對流與強制對流強度之比的混合對流參數ξ，並定義一些適當的轉換變數，將系統的主導方程式轉換成比較容易進行數值解之無因次方程式組。
然後應用穩定性高及有效率的數值方法，求出包含從純粹質傳控制轉換到純粹熱傳控制之完整浮力比範圍( )，以及由強制對流至自然對流之整個混合對流區域( )之精確數值解。
數值解經由合適的數學轉換後，以較具有物理意義的形式作圖。圖中可以顯示系統中速度、溫度及濃度的分佈情形以及路易士數對熱傳與質傳之影響。
本文分析的對象為常見的空氣與稀薄水溶液系統。涵蓋的路易士數範圍從低路易士數(0.3至3.0)到高路易士數(20至200)。從圖中的結果可以發現，路易士數越小，則流速越大；但對高路易士數來說則影響有限。並且路易士數對質傳的影響較對熱傳來的明顯。而在高路易士數的系統中，對質傳速率的影響要比低路易士數的系統更為顯著。

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