- 作者: 黃榮鑑; 王子榮; 彭逸凡
- 作者服務機構: 中央研究院物理研究所; 國立海洋大學理工學院; 國立台灣大學造船研究所
- 中文摘要: 本研究是發展一個新的素紊流模式以改進現階段之紊流模式。木文提出之紊流模式與現有之模式存在兩點不同。第一,紊流傳輸效應中之擴散項以非導方向性質處理。第二,由小渦運動所主導之紊動能消散率為非等方性。此模式由幾個自由剪力流場之計算結果驗證,其結果與實驗數據相當吻合,且與現有模式比較時,有明顯的改進。
- 英文摘要: This study is to improve the state-of-the-art of turbulence modeling to propose a new turbulencemodel. The developed turbulence model differs from the existing turbulence model in two aspects. First,the diffusion of turbulent transport property is treated as an anisotropic phenomenon. Second, the dissipa-tion of turbulent kinetic energy in the small eddy motions is treated as an anisotropic dissipation It istested for computing some turbulent free shear flows. Comparing the predicted results with the experi-mental data, it is evident that the new proposed turbulence model is very satisfactory and offers significantimprovement over existing turbulence models.
- 中文關鍵字: turbulence model; turbulent flow; anisotropic
- 英文關鍵字: --