本文主要以數值方法探討具底部加熱之水平渠道內表面運動與共軛熱傳的影響。在數值計算的方法上，是以控制體積法為基礎，並配合有限差分法及冪次法則在正交、非等間距的交錯式格點上將各統御方程式離散成差分方程式，並且以SIMPLE法來求解動量方程式中壓力項與速度項耦合的問題；對於紊流的運動行為與結構則是以k-w雙方程紊流模式來描述。

在本文當中所討論的參數有：雷諾數(Re= 3000~9000)、加熱量(Qt= 10 kW~50 kW)或加熱溫度(Th= 600 K~1000 K)、晶座參數(S= 0~1)以及傳導比(K= 1~10)。數值計算結果顯示，表面運動與共軛熱傳對於渠道內部及晶座表面的溫度分布與均勻性有顯著的影響。當表面的運動速度加快時，會使晶座的表面溫度下降、高溫帶變窄並且向加熱區下游方向移動，熱量除了傳導之外並藉由表面運動帶往下游，使加熱段後方的表面溫度升高。而改變加熱方式也會對晶座表面溫度分布的均勻性造成影響，加熱區以定溫加熱的方式所得到的晶座表面溫度分布較定加熱量的方式來得均勻。此外，表面運動也會對紊流動能造成影響，但因為表面運動的速度相較於進口速度是相當小的，因此在靠近底部壁面區域的紊流動能只有微小的變化。

This study presents the numerical simulation of surface motion and conjugate heat transfer in a horizontal channel heated from below. The governing equations are discretized by using a Control-Volume-Based finite-difference method with power-law scheme on an orthogonal non-uniform staggered grid. The coupling of the velocity and the pressure terms of momentum equations are solved by SIMPLE (Semi-Implicit Method for Pressure-Linked Equation) algorithm. And the well-known k-w two-equation turbulence model is employed to describe the turbulent structure and behavior.

The parameters include Reynolds number (Re= 3000~9000), total heat input rate (Qt= 10 kW~50 kW) or heating temperature (Th= 600 K~1000 K), susceptor parameter (S= 0~1) and conductance ratio (K= 1~10). Surface motion and conjugate heat transfer are demonstrated to significantly affect the temperature distribution and uniformity at the channel and susceptor surface. With increasing the surface motion speed, the high temperature band becomes narrow, lower and shifts downstream toward the heating zone. Thermal energy not only conducts to the surface, but also conveys by surface motion, it leads to the surface temperature behind the heating zone increase. In addition, changing the heating manner will affect the uniformity of the temperature distribution of the susceptor surface, too. The temperature distribution of the susceptor surface above the heat zone which heated with constant heating temperature is more uniform than with constant heat input. Furthermore, the surface motion also affects the turbulent kinetic energy. But the speed of the surface compares with inlet velocity is quite low. Hence, it only causes a little effect upon the bottom wall region in the channel.

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