English  |  正體中文  |  简体中文  |  Items with full text/Total items : 52084/87215 (60%)
Visitors : 8916596      Online Users : 83
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/85623

    Title: 微結構三維流場與熱傳現象
    Other Titles: Fluid Dynamics and Heat Transfer Analysis of a 3D Microstructure
    Authors: 洪祖昌;Hong, Zuu-Chang;邱昱中;Chiu, Yu-Chung;林雅茹;Lin, Ya-Ru
    Contributors: 淡江大學機械與機電工程學系
    Keywords: 直接模擬蒙地卡羅法;微機電系統;微結構;DSMC;MEMS;Microstructure
    Date: 2005-12
    Issue Date: 2013-04-09 11:47:44 (UTC+8)
    Publisher: 新竹市:清華大學
    Abstract: 本文以直接模擬蒙地卡羅法(Direct Simulation Monte Carlo Method)[1]來模擬研究三維微結構物理模型對流場現象與熱傳作分析與探討。在低速管流的模擬中,紐森數的範圍設定在0.08到1.8之間且微結構溫度分別設定為273K,323K和373K。在模擬中,比較三維模擬結果與二微模擬結果之差異性。就結果而言,可以觀察出在三維模擬的例子中,兩側壁的效應影響了熱傳與流場性質且在三維的流場模擬中,壁的熱傳量也隨著紐森數的增加而減少。而在三維的模擬中,也模擬加大長寬比1,3和5倍,其結果顯現在三維的模擬中,長寬比小於3的時候,兩邊壁的效應對熱傳與流場的影響就相當顯著。隨著長寬比的增加,此時流場的性質與熱傳表現是接近二維模擬時的結果。當長寬比大於5的時候,發現二維模擬的結果是合理的。
    The Direct Simulation Monte Carlo (DSMC) method is employed to analyze the heat transfer and the fluid dynamics characteristics of a 3-D microstructure. The microchannel flows are simulated with Knudsen numbers ranging between 0.08 and 1.8 and with three different temperatures 273k, 323k and 373k of microstructure. The calculated flow properties in the 3-D case are compared with those in the 2-D case. It shows that the two extra side walls in the 3-D case have significant effects on the heat transfer. The wall heat transfer decreases with an increase in Knudsen number. The 3-D microchannel flows is also simulated with the cross aspect ratio in the range of 1 ,3 and 5. It shows that when the aspect ratio < 3, the two extra side walls in the 3-D case have significant effects on the heat transfer. When the aspect ratio increases, the flow pattern and heat transfer characteristics tend to approach that of 2-D results. The 2-D simplification is found to be reasonable only when the cross aspect ratio is larger than 5.
    Relation: 中華民國力學學會第二十九屆全國力學會議論文集,8頁
    Appears in Collections:[機械與機電工程學系暨研究所] 會議論文

    Files in This Item:

    File Description SizeFormat
    微結構三維流場與熱傳現象 _中文摘要.docx摘要14KbMicrosoft Word129View/Open
    微結構三維流場與熱傳現象 _英文摘要.docx摘要14KbMicrosoft Word48View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback