July 8, 2024 at 11:22 am
Hui Wang
Subscriber

@Rob

Hi Rob, thank you for your reply! Very sorry for the delayed response! 

The height of the first cell is 2E-05m (center of the cell), and the diameter of droplet is 1.4um-21um. 

In my case, the turbulence dispersion should drive the particles deposits on the pipe wall. Actually, i model this case just following a research paper with the name of  "Towards quantitative prediction of aerosol deposition from turbulent flows", the conclusion is that "The use of isotropic turbulence models resulted
in over-prediction of V+ by more than 3 orders of magnitude for tao_plus 0.2, whilst the anisotropic RSM gave results in good agreement with experiment. " But in my case, even i use the same model settings as the research paper, there is little deposition for the case of 1.4um (tao_plus 0.2). In fact , a lot of research papers show the same results. So i am really confused. It seems that the particles are getting stuck in the boundary layer and never colliding with the wall.

The attached link https://www.researchgate.net/publication/222936725_Towards_quantitative_prediction_of_aerosol_deposition_from_turbulent_flows shows the reference paper. 

BTW, how can i show you my case in this forum? 

Thanks in advance!