Turbulence modulation model for gas-particle flow based on probability density function approach

• 来源期刊: 中国物理B（英文版）
• 关键词: turbulence modulation model PDF approach gas-particle flow turbulence flow
• 年，卷（期）: 2017,（8）
• 页码范围: 235-241
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/8/084702

摘要

The paper focuses on the turbulence modulation problem in gas-particle flow with the use of probability density function (PDF) approach.By means of the PDF method,a general statistical moment turbulence modulation model without considering the trajectory difference between two phases is derived from the Navier-Stokes equations.A new turbulence production term induced by the dispersed-phase is analyzed and considered.Furthermore,the trajectory difference between two media is taken into account.Subsequently,a new k-ε turbulence modulation model in dilute particle-laden flow is successfully set up.Then,the changes to several terms,including the turbulence production,dissipation,and diffusion terms,are well described consequently.The promoted model provides a more probable explanation for the modification of particles on the turbulence.Finally,we applied the model to simulate a gas-particle turbulence flow case in a wall jet,and found that the simulation results agree well with the experimental data.