Hold-up in a Wetted Wall Tower

Kamei, Saburo; Oishi, Jun; Iijima, Hideo; Kawamura, Makoto; Itoi, M.

doi:10.1252/kakoronbunshu1953.18.545

Cited by 8 publications

(2 citation statements)

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“…Many researchers have proposed various models for calculating the film thickness in terms of theory. Nusselt was the first to propose equations for the falling film flow along a vertical tube but these were found to fail to predict the film thickness correctly, even for steady laminar conditions of flow . Kapitsa has proposed a model for predicting the film thickness on a plate, but it fails to predict the film thickness for turbulent flow .…”

Section: Introductionmentioning

confidence: 99%

A study of film thickness and hydrodynamic entrance length in liquid laminar film flow along a vertical tube

et al. 2018

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The liquid film thickness and hydrodynamic entrance length in a vertical tube was studied experimentally and numerically. Measurements using distilled water, 30 wt % MEA and 40 wt % sugar solutions were carried out to investigate the effects of liquid flow rate on the formation of the liquid film. The experimental results validate the new Navier-Stokes based equation in cylindrical coordinates (Eq. 16) and the volume of fluid (VOF) model giving a competitively high prediction of the liquid film thickness especially in the low Reynolds number region. In addition, a new empirical model and an improved minimal surface model have been first proposed for calculation of the hydrodynamic entrance length, with a relatively reasonable average absolute relative deviation (AARD) of 3.03% and 6.83%, respectively. Furthermore, the effects of the hydrodynamic entry length on the gas-liquid interfacial area calculated by the improved minimal surface model were comprehensively studied, and can be ignored if the ratio of the liquid film length (y) and the hydrodynamic entrance length (k E ) is lower than 10. However, it should be noted that the hydrodynamic entrance length cannot be ignored in packed columns in which the liquid flow is very complex due to the packings with different structures and materials.

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Section: Introductionmentioning

confidence: 99%

A study of film thickness and hydrodynamic entrance length in liquid laminar film flow along a vertical tube

et al. 2018

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“…This was offered as a possible explanation for the reported lack of agreement of the effect of diffusion on capacity data. An entirely different type of holdup was studied by Kamei and assistants (34). They used small wetted wall columns of 3 to about 2 inches in diameter and investigated thickness of liquid film by itself, in relation to concurrent gas flow and some other factors.…”

Section: Towersmentioning

confidence: 99%