Numerical simulation on liquid film flow turbulence characteristics of corrugated baffle-type plate under high Reynolds number

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-08-15 DOI:10.1016/j.cep.2025.110511

Liang Wang

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Abstract

The stability of falling film flow is an important research problem in the vertical falling film evaporation flow.In this paper, the vertical falling film device with corrugated baffles is proposed, corrugated baffles are added to the structure of the traditional flat falling film device.The falling film device is simulated by fluent, and the effects of wave height, wavelength and inlet flow rate on the measurement results are analyzed. The results show that compared with the traditional flat plate liquid film falling device, the corrugated plate baffle has smaller turbulence intensity and greater resistance liquid film thickness. The higher wave height is, the turbulence intensity of the corrugated baffle is greater. However, the thickness of liquid film varies greatly. The smaller wavelength is, the turbulence intensity of the corrugated plate is smaller, but the change of liquid film thickness is also very small. The maximum deviation between the empirical formula of the fitting curve between the liquid film thickness and Reynolds number and the calculated value is 14.93 %. The maximum deviation of average liquid film thickness is 2.32 %, the maximum standard deviation(SD)is 0.27 mm, and the maximum relative standard deviation(RSD)is 0.061.

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高雷诺数下波纹折流板液膜流动湍流特性的数值模拟

降膜流的稳定性是垂直降膜蒸发流研究的一个重要问题。本文提出了一种带波纹折流板的垂直落膜装置，在传统的平面落膜装置结构上增加了波纹折流板。利用fluent软件对降膜装置进行了仿真，分析了波高、波长和进口流量对降膜装置测量结果的影响。结果表明，与传统的平板液膜下降装置相比，波纹板挡板湍流强度较小，阻力液膜厚度较大；波高越高，波纹折流板湍流强度越大。然而，液膜的厚度变化很大。波长越小，波纹板的湍流强度越小，但液膜厚度的变化也很小。液膜厚度与雷诺数拟合曲线的经验公式与计算值的最大偏差为14.93%。液膜平均厚度的最大偏差为2.32%，最大标准偏差（SD）为0.27 mm，最大相对标准偏差（RSD）为0.061。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.