移動物體之可視化

Abstract

中文摘要 本文主要目的為利用數值計算與流場可視化結合的技術，經由這個技術可以簡單顯示流場的型態。本文使用此種方式模擬(一)移動物體在流場中之變化情形，利用穩態和暫態流場來討論物體在流場中的變化，並將製作出來的動畫合併同時播放，討論兩種不同條件下流場變化情形。(二)汽車排放廢氣污染情形，主要分為汽車在行進中排放廢氣汙染情形、汽車在靜止情況下排放廢氣汙染情形、汽車在陣列情況下排放廢氣汙染情形、汽車在順風和逆風情況下排放廢氣汙染的情形，將這些不同條件下的結果利用後處理軟體和影像編輯軟體製作成動畫，以清楚觀察流場中濃度的變化情形。(三)無塵室工作台車與粒子飛行軌跡的討論，主要是模擬在均勻流場和非均勻流場下之粒子飛行軌跡和工作台車之間的影響，並將粒子飛行軌跡和氣流場的動畫利用影像覆疊軟體製作成簡單易懂的動畫。

ABSTRACT The aim of the study is to couple computational fluid dynamics simulations with flow visualization techniques to animate real flow phenomena especially for moving boundary problem. In the study, flow phenomena including moving boundary problems are solved numerically first. Use the results of flow field and find out fluid particles trajectory, and visually vivid dynamic flow phenomena likes animation could be produced. Continuously adopt a code of Fieldview and use gray color technique to color the flow phenomena. Then colorful dynamic flow phenomena could be finished. In this study, three dynamic flow phenomena of a car moving in flowing fluid, pollutant concentration diffusing with a moving car and particles in laminar flow captured by a moving vehicle in clean room are mainly considered. The characteristic of this study is to make dynamic flow phenomena become visuable and easily understandable.