Premium
Three‐dimensional large eddy simulation of wave characteristics of liquid film flow in a spinning disk reactor
Author(s) -
Li YanBin,
Wu XiangSen,
Liu YaZhao,
Chu GuangWen,
Sun BaoChang,
Luo Yong,
Chen JianFeng
Publication year - 2020
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16894
Subject(s) - spinning , turbulence , amplitude , spiral (railway) , mechanics , sine wave , concentric , flow (mathematics) , materials science , optics , physics , geometry , engineering , mechanical engineering , composite material , mathematics , quantum mechanics , voltage
Abstract The waves of liquid film flow play an important role on the process intensification in spinning disk reactors (SDRs). However, the mechanism of wave formation was still unclear. In this work, a three‐dimensional large eddy simulation was developed to investigate the mechanism, as well as the characteristics of waves in the SDR. Agreed with the imaging results, different wave patterns were identified as: smooth film, concentric, and spiral waves in spreading direction; sine‐like and pulse‐like waves in fluctuating direction. The radial and tangential relative movements among the layers of liquid film were found to dominate the formation of different wave patterns. Local average film thickness ( h avg ) and local wave amplitude (Δ h ) ranged from 0 to 500 μm and 0 to 200 μm, respectively. The waves can improve the turbulent intensity and enlarge the specific surface area, resulting in the intensification of transfer processes.