Analyse heterogener Filmströmungen in Fallfilmabsorbern

Paschke, Steve; Thiele, R.; Repke, Jens‐Uwe

doi:10.1002/cite.200950125

Cited by 1 publication

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, PIV method is proved to be an effective way. Flow field of the liquid film over triangular corrugations was measured in previous work by Paschke , with a micro-PIV method. In his experiments a CCD-camera is located perpendicular over the measurement cell.…”

Section: Validation Of the Numerical Modelmentioning

confidence: 99%

“…The velocity in the liquid film is measured at 13 different layers with a distance of 0.05 mm between every layer. The velocity profiles measured in this way (more details of the experiments are given in Paschke , ) can be used to validate the simulations in this work.…”

Section: Validation Of the Numerical Modelmentioning

confidence: 99%

“…Sketch of the numerical model: (a) numerical model and boundary conditions and (b) dimensions of the corrugation and the position of flow field to be compared with experiments done by Paschke. , …”

Section: Validation Of the Numerical Modelmentioning

confidence: 99%

“…In the experiments, a sCMOS camera is used to capture the free surface position to validate the simulations. For additional evaluation of the numerical model, the results measured by PIV method from Paschke , are used to validate the numerical model quantitatively. With the validated numerical model, a series of investigations of film flow over triangular corrugations are carried out.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental and Numerical Investigation on Gravity-Driven Film Flow over Triangular Corrugations

Tong

Marek

Hong

et al. 2013

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Liquid film flow over triangular corrugations is investigated by simulations and experiments. The volume of fluid (VOF) method is used to track the free surface between the liquid and gas in computational fluid dynamics (CFD) simulations.In the experiments, a sCMOS camera is applied to capture the film flow in a channel. The comparison of the results from threedimensional (3-D) simulations and experiments shows good agreement. To validate the simulations quantitatively, twodimensional (2-D) simulations are carried out and the velocity profiles in the liquid film flow field are compared with experimental results. With the validated model, a series of numerical investigations of liquid film flow over triangular corrugations are accomplished. Resonance between the free surface and the corrugations is found when the Reynolds number (Re) of the liquid flow reaches a certain value. When resonance occurs, the amplitude of the waves on the free surface gets the maximum but eddies in the troughs of the corrugations are suppressed. The steepness effect of the corrugations is also investigated. No relationship between the steepness and the resonance could be observed, but steeper corrugations can cause undulations with higher amplitude on the free surface in the low Re range. To investigate the surface tension effect, the inverse of Bond number is introduced. It is found that the inverse Bond number (Bo −1 ) has a direct relation to the resonance phenomenon. Film flow with a lower Bo −1 value encounters the resonance at a lower Re value. Since the velocity component normal to the corrugated plate plays a significant role during the convection of mass transfer in film flow, the normal flow intensity is investigated. A local maximum of the normal flow intensity is found at the resonance point.

show abstract

Section: Validation Of the Numerical Modelmentioning

confidence: 99%

Section: Validation Of the Numerical Modelmentioning

confidence: 99%