用格子Boltzmann方法数值模拟三维空化现象  

Three-dimensional cavitation simulation using lattice Boltzmann method

作　　者：张新明[1] 周超英[1] Islam Shams 刘家琦[2] 

机构地区：[1]哈尔滨工业大学深圳研究生院,深圳518055 [2]哈尔滨工业大学数学系,哈尔滨150001

出　　处：《物理学报》2009年第12期8406-8414,共9页Acta Physica Sinica

基　　金：广东省自然科学基金(批准号:07300059);中国博士后科学基金(批准号:20080430930)资助的课题~~

摘　　要：空化是一种微观、瞬时、随机、多相的复杂现象,其过程中所产生的极端条件以及伴随的一系列空化效应,将对液流系统产生破坏性和建设性两方面的作用.采用基于Shan-Chen模型的单组分多相流格子Boltzmann方法对水体中的三维空化现象进行了数值模拟,研究了低压下水体中气核半径与空化现象的相互关系,成功再现了低压下水体中微小气核发展成气泡的过程,并进一步研究了水体依次流经低压区、高压区时空化产生、发展、溃灭的全过程.数值模拟结果和理论预测结果符合良好.The cavitation is a complex phenomenon which is microcosmic,transient,stochastic and multiphased. The extreme condition and related cavitation effects which the collapsed cavities generate will affect the liquid-vapor system greatly. In this article,we accurately simulate heterogeneous cavitation in liquid system with single component multiphase lattice Boltzmann model and successfully reproduce the complete cavitation process of a bubble：inception,growth and collapse. The relationship between the radius of bubble seed and cavitation for a specified tension has been investigated by lattice Boltzmann method simulations. The simulations show excellent agreement with energy considerations based on interface formation and bubble expansion.

关 键 词：单组分多相流 格子BOLTZMANN方法 三维空化 

分 类 号：O35[理学—流体力学] TQ440.5[理学—力学]