Numerical Simulation Research of Effects of Pulsating Air Flow on Liquid Film Evaporation Over Vertical Plates

ZHONG Yin; LING Changming; XIE Gongnan

doi:10.21656/1000-0887.400386

Volume 41 Issue 5

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ZHONG Yin, LING Changming, XIE Gongnan. Numerical Simulation Research of Effects of Pulsating Air Flow on Liquid Film Evaporation Over Vertical Plates[J]. Applied Mathematics and Mechanics, 2020, 41(5): 491-498. doi: 10.21656/1000-0887.400386

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Numerical Simulation Research of Effects of Pulsating Air Flow on Liquid Film Evaporation Over Vertical Plates

doi: 10.21656/1000-0887.400386

¹Shenzhen Institute of Guangdong Ocean University, Shenzhen, Guangdong 518108, P.R.China;²School of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R.China;³School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, P.R.China

Received Date: 2019-12-30
Rev Recd Date: 2020-01-05
Publish Date: 2020-05-01

Abstract

Abstract

A 2D physical and mathematical model for vertical plate falling film evaporation was established. The effects of pulsating airflow on the falling film evaporation process were studied through numerical simulation. The change rule of the Sherwood number under different average air velocities, amplitudes and frequencies was analyzed. The results show that, when the relative amplitude of pulsation is 5/6, the mass transfer efficiency of the vertical falling film will increase by 6.6%; when the Womersley number is greater than 26, the mass transfer efficiency will increase by 8.3%. Compared with uniform airflow, the pulsating airflow can effectively enhance the convective mass transfer of falling film evaporation.
- vertical plate,
- falling water film evaporation,
- pulsating airflow,
- numerical simulation

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References(16)

References

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