本文利用晶格波茲曼法來模擬低雷諾數、穩態、不可壓縮的二維Y型渠道熱混合流。在進出口給定適當壓差使得流體能夠流動，並藉由在後段長直渠道的壁面上置入不同形狀的突起物，使得流體在衝擊到突起物後，流場與溫度場產生局部的變化，加速流場的熱混合效率。
通常在兩平板間的渠道流動置入障礙物時，會增加流體的擾動進而影響到流體的熱傳。也由於此種型態的流動在結構設計上對於熱傳效應有極大的關連，因此在實際應用設計上具有其重要性。如果進一步考慮流體具有不同溫度在渠道內混合時，渠道的幾何形狀對流體傳熱有顯著的影響，因此值得我們加以探討。
在後段長直渠道部份，置入不同數量的波浪突起物以及接地圓，當流體流經這些突起物時，因為壓力阻力的關係，使得流體產生迴流，大大的影響了渠道內的溫度分佈，更加速了流體的熱混合效率。
以另一種角度來解讀場協同理論，說明對於熱混合問題，協同角的增加，會加速高溫及低溫流體的熱交換，以達到較好的熱混合效率。

This study applies the Lattice Method to simulate low Reynolds number, steady-state and 2-D incompressible thermal mixing flow in a multi-branch channel. The pressure difference of inlet and outlet is set appropriately so that the fluid particles can be driven. To accelerate the efficiency of the thermal mixing, the distinct shapes of obstacles are inserted into the straight wall being in back of the multi-branch channel. After the fluid particles bomb into the obstacles, the variation of the flow and temperature field then generated.
When the fluid particles flow past the inserted obstacles in two parallel plates, the perturbation caused by the impact will affect the heat transfer of the flow. This type of flow is associated with the fabrication design along with the effect of heat transfer so that the application is very important. If we consider the flow with temperature difference mix inside the channel, the geometry of the channel will have great effect on thermal characteristics.
We place numbers of obstacles being in the form of wavy-like and touch down circle in the back straight part of multi-branch channel. When fluid particles flow past these obstacles, the recirculation regions are raised due to the pressure drag. The recirculation region impact on the temperature distribution magnificently and hasten the efficiency of the thermal mixing.
Taking another view of field synergy principle specify the thermal mixing problem. The increase of intersection angle will accelerate the heat exchange rate between high-temperature and low-temperature fluid particles.

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