球塊狀蔬果冷卻熱傳之研究（一）模擬程式之建立

Studies on the Heat Transfer Analysis of Fruits and Vegetables with Arbitrary Shape during Cooling(Ⅰ)

陳俊明(Jiunn-Ming Chen) ； 賈明益(Ming-I Char) ； 劉毅彬(Yi-Pin Liu)

《農業機械學刊》 4卷1期 (1995/03) Pp. 23-34

https://doi.org/10.30062/JAM.199503.0003

摘要

本研究建立一套電腦程式軟體，用以模擬軸對稱球塊狀蔬果在任意不規則幾何外形下之冷卻暫態熱傳遞研究。數值分析法是採用有限差分法；由於蔬果外形不規則，本研究先以實體吻合座標產生法來建立計算網格，並將蔬果之熱傳導方程式亦轉換到此計算平面，以計算得蔬果內任意位置處之溫度分佈及其表面之熱通量值。此外，為了驗證本程式之精確，亦和Pan與Bhowmik（1991）之有限單元數值解做一比較，結果十分良好。

關鍵字

熱傳 ； 冷卻 ； 有限差分 ； 格點產生

並列摘要

This paper will develop a computer program based on application of the finite difference method for predicting temperature distribution in fruits and vegetables represented by real axisymmetric shape. Owing to the irregular shape of the fruits and vegetables, the body-fitted coordinate grid generation method is used to transform the original irregular shape into a regular computational domain. The transient heat transfer characteristics of fruits and vegetables during the cooling process will be computed on the computational domain. The numerical results are checked and compared with previous ones done by Pan and Bhowmik(1991)who use the finite element method to calculate the temperature distribution of fruits during the cooling process. Our numerical results show a good agreement with their results.

並列關鍵字

Heat transfer ； Cooling ； Finite difference ； Grid generation