查詢結果分析
相關文獻
- 水中震波聚焦行為之數值模擬
- Antegrade Ureterorenoscopic Manipulation of Upper Ureteral Stones
- Finite Volume Calculations of Three-Dimensional Compressible Flows
- The Experience of Second Generation Lithotriptor for Treatment of Upper Urinary Tract Calculi in Children
- Subcapsular Hematoma of the Kidney after Extracorporeal Shock-Wave Lithotripsy
- 靜脈麻醉在體外震波碎石術之應用
- Calculi Occurrence in Patients with Urinary Diversion
- 體外震波碎石術及其護理
- Numerical Study of Underwater Shock Wave Focusing
- 應用超音波評估體外震波碎石術治療後之併發症
頁籤選單縮合
題 名 | 水中震波聚焦行為之數值模擬=Numerical Simulation of Under-Water Shock Wave Focusing |
---|---|
作 者 | 梁勝明; 蔡文彬; | 書刊名 | 遠東學報 |
卷 期 | 24:4 2007.12[民96.12] |
頁 次 | 頁(I)57-(I)66 |
分類號 | 440.13 |
關鍵詞 | 尤拉方程式; 水中震波聚焦; 體外震波碎石術; Euler equations; Underwater shockwave focusing; Extracorporeal shock wave lithotripsy; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究採用高階數值計算方法來模擬震波在聚焦過程中的流場。為了能 更準確的捕捉聚焦時的高壓,採用五階的加權基本不振盪法來解軸對稱可壓 縮尤拉方程式,而在水的狀態方程式以 Tait 狀態方程式來描述,至於時間積 分上則採用四階 Runge-Kutta 數值方法。為了驗證所採用數值方法的正確性及 模擬水中震波聚焦的能力,本研究驗證軸對稱拋物面之反射震波聚焦及自動 聲波聚焦問題,並將計算結果與現有文獻結果比較。數值模擬結果除了與現 有文獻結果吻合,在自動聲波聚焦問題上,本文並探討聲學鏡片幾何參數及 入射波強度對聚焦壓力之影響。 |
英文摘要 | In this study, a numerical high-resolution method is used to simulate the phenomenon of shock wave focusing in water. In order to accurately capture the high pressure at the geometric focus, a 5th-order weighted essentially nonoscillatory scheme is employed to solve the axisymmetric Euler equations in conjunction with a non-TVD 4th -order Runge-Kutta method. The equation of state for water is described by the modified Tait equation. To verify the accuracy of numerical simulation, we test a two-dimensional problem of underwater planar shockwave focusing over a parabolic reflector and an axisymmetritc problem of self-focusing of shockwave passing an acoustic lens in a spherical shape. The computed results are compared with the existing data. It is found that the present result of the shockwave self-focusing problem is reasonably accurate. The effects of the geometric parameters associated with the acoustic lens and of the incident shockwave strength on the peak pressure at the gasdynamic focus are investigated. |
本系統中英文摘要資訊取自各篇刊載內容。