Effect of Triangular Corrugations on Dynamic Characteristics of Film Flow

Tong, Zhongyao; Hong, Weirong; Marek, André; Repke, Jens‐Uwe

doi:10.1016/j.proeng.2012.07.446

Cited by 6 publications

(12 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 4a,b, Guo et al 37 also found the vortices on the triangular corrugation ( Le = 10 mm, De = 2 mm, St = 0.2 mm, ϕ = 60 ο ) by the measurement and simulation, which can be used for a comparison. Therefore, we apply the model of triangular corrugation ( Le = 3 mm, De = 0.6 mm, St = 0.2, ϕ = 60 ο ) to simulate the film flow at Re = 162 using the fluids in Guo et al 37 Figure 4c depicts the present result, which has a similar appearance as the results in Guo et al 37 This phenomenon was also observed in Tong et al, 36 which can be explained by the theory of fluid similarity. Namely, the dimensions of the above plates are different, while they have equal Re and St .…”

Section: Problem Formulationsupporting

confidence: 80%

“…Moreover, it was found that the vortices exist on the triangular corrugation with St = 0.2 37 and St = 0.5 38 . The vortices are easier to take place on the triangular corrugations when the St is higher 36 . St = 0.14 is the minimum when the vortices tend to happen at Re = 1200 in the present models.…”

Section: Resultsmentioning

confidence: 96%

“…The curved surface structure can promote mass transfer by disturbing the flow in the falling film dehumidifiers 35 . The enhancement mechanism may occur by the generation of vortices on the corrugation trough, which has a “rolling” effect that can reduce the viscous resistance 36–38 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Wan

2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

In this study, 2D and 3D models of corrugated plates using the volume of fluid (VOF) model were set up to simulate the influence of corrugated structure on the wettability and heat transfer. The results show that compared with the triangular corrugation, the rectangular corrugation has a slower growth rate of wetting ratio (WR) as the Weber number (We) increases under the same corrugation length Le and corrugation depth De. The average WR of the triangular corrugation is 2.8% less than that of the smooth plate. For the triangular corrugation, the higher Le contributes to improving wettability, but the average heat transfer coefficient havg first decreases to the minimum at Le = 5 mm and then increases 8% to 9% to a steady value until Le = 8 mm. WR decreases with De at We ≤ 0.76. A WR correlation considering the corrugation steepness St (St = De/Le) and a critical Re correlation corresponding to the minimum wetting rate were fitted for the liquid oxygen. As the inclination angle ϕ increases, the average film thickness decreases and havg increases until ϕ = 75°, while the variation rate slows down afterwards. At Re = 1200, havg has a decreasing trend at St ≤ 0.13, increases at St ≥ 0.14 and reaches a plateau after St = 0.24 as St increases. It increases by 30.6%, 47.4%, and 44.4% for the inclination angle ϕ = 30°, 60°, 90° cases from St = 0.14 to 0.24. The enhancement is caused by the vortices existing at St ≥ 0.14.

show abstract

Section: Problem Formulationsupporting

confidence: 80%

Section: Resultsmentioning

confidence: 96%

See 1 more Smart Citation

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Wan

2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…Paschke investigated the film flow over a vertical sinusoidal corrugation using the particle image velocimetry method and found that the experimental results agreed well with the simulation results (Paschke 2011). Pak and Tong studied the film flow on rectangular and triangular corrugated plates respectively (Pak and Hu 2011, Tong 2012, 2013. The simulations results in all these studies showed good agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 66%

“…All the elements in the main flow direction have approximately the same size. A model with three periodicity corrugation is chosen, and the flow field in the second trough is investigated (Tong et al 2012).…”

Section: Numerical Implementationmentioning

confidence: 99%

Comparative Study on the Characteristics of Film Flow with Different Corrugation Plates

Guo

Tong

et al. 2015

Microgravity Sci. Technol.

View full text Add to dashboard Cite

The geometry of the packing structure can affect the flow pattern and considerably influence the mass transfer efficiency between liquid film and gas phase. Therefore, it is necessary to investigate the flow patterns and factors that determine the efficiency of mass transfer and heat transfer. In this study, different packing structures, namely, sinusoidal, triangular, and rectangular corrugated plates, are investigated. Computational fluid dynamic simulations based on the volume-of-fluid method are performed by using the open-source software OpenFOAM to study the liquid film flow over these corrugation plates. The freesurface area between the liquid and gas has been found to reach its maximum when the resonance phenomenon occurs. According to the simulation results the triangular corrugated plate has the largest free-surface area among the three types under the same conditions for a certain Reynolds number. The results also indicated that the pattern of film flow on the sinusoidal and triangular corrugated plates is similar; the rectangular type is not good as the other two types. It is useful to choose a suitable packing structure when considering the manufacturing process and cost The research results provide a theoretical basis for the study of heat and mass transfer used in industry applications.

show abstract

Hydrodynamics of New Structured Packings: an Experimental and Micro-scale CFD Study

Guo

Hong

Repke

2018

Microgravity Sci. Technol.

View full text Add to dashboard Cite

Effect of Triangular Corrugations on Dynamic Characteristics of Film Flow

Cited by 6 publications

References 23 publications

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Numerical study of the falling film wettability and heat transfer on the inclined plates with different corrugated structures

Comparative Study on the Characteristics of Film Flow with Different Corrugation Plates

Hydrodynamics of New Structured Packings: an Experimental and Micro-scale CFD Study

Contact Info

Product

Resources

About