TRANSPORTATION OF PASSIVE SCALAR IN INHOMOGENEOUS TURBULENCE

• 来源期刊: 力学学报（英文版）
• 年，卷（期）: 2000,（1）
• 页码范围: 21-28
• 页数: 8页
• 语种: 英文

摘要

The paper studies the transportation of passive scalar in the inhomogeneous turbulence by means of large eddy simulation.The prediction accuracy is verified by the well-known Comte-Bellot spectrum of the homogeneous turbulence.The mean transportation properties are predicted with satisfaction and the underestimation of the thermal flux by the phenomenological models has been disclosed.The high intermittence of the temperature fluctuations has been found in the inhomogeneous turbulence and it is the reason for the underestimation of turbulent thermal flux by the phenomenological model.