花气袭人知骤暖——从花香四溢谈流体的扩散运动  

THE FRAGRANCE OF FLOWERS TOUCHES THE PEOPLE AS THE MESSENGER OF THE SUDDEN WARMTH:DISCUSSING THE DIFFUSION MOTION

作　　者：刘晋闻 马兴宇 姜楠[1] LIU Jinwen;MA Xingyu;JIANG Nan(School of Mechanical Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学机械工程学院,天津300072

出　　处：《力学与实践》2025年第1期253-257,共5页Mechanics in Engineering

基　　金：国家自然科学基金(12372278);翼型叶栅空气动力学国家重点实验室稳定支持项目(61422010301);气动噪声控制重点实验室联合项目(ANCL20230108);天津大学课程思政示范课程建设项目(2023-2024);军科委“飞行器流动控制前沿科技及应用科普资源建设与实践”科普专项课题(2024)资助。

摘　　要：扩散运动是流体常见的运动形式之一。本文从中国古代诗歌中描写花香的佳句“花气袭人知骤暖”谈起,通过分析菲克定律和佩克莱数在流体扩散中的作用,讨论花香分子传播的基本原理,以此为引,漫谈流体力学中的扩散运动及其在机械、化工、生物卫生等领域的应用。Diffusion motion is a common form of fluid motions.In this paper,by discussing the ancient Chinese poem “ The fragrance of flowers touches the people as the messenger of the sudden warmth”,we investigate the underlying physical mechanism of the diffusion phenomena of enchanting flower fragrance.By comparing the differences in concentrations of fragrance molecules,we find the Fick's law and the Peclet's number play essential roles in the principles of fluid diffusion.We then discuss the phenomena of diffusion in everyday life,as well as its various engineering applications.

关 键 词：花香 扩散运动 菲克定律 佩克莱数 

分 类 号：O351.2[理学—流体力学]