Thin water films driven by air shear stress through roughness

Wang, G.; Rothmayer, A. P.

doi:10.1016/j.compfluid.2008.02.009

Cited by 21 publications

(11 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also well known that air driven films can be nonlinearly coupled to underlying surface roughness when surface tension is present (see Wang & Rothmayer,4 for example). The underlying roughness can act to channel water beads or rivulets or even create rivulets within an otherwise uniform film, thereby effecting the rate and direction of film mass transport along the surface.…”

Section: Introductionmentioning

confidence: 98%

On the Numerical Solution of Three-Dimensional Condensed Layer Films

Rothmayer

2014

6th AIAA Atmospheric and Space Environments Conference

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 98%

On the Numerical Solution of Three-Dimensional Condensed Layer Films

Rothmayer

2014

6th AIAA Atmospheric and Space Environments Conference

View full text Add to dashboard Cite

show abstract

“…However, physics with the run-back freezing of SLD is more similar to impact freezing of supercooled droplet on inclined surface rather than horizontal surface. Although many researches have been carried out on water layer flow on inclined surface [14][15][16][17][18], the mechanism of water flow and phase change in the freezing process of droplet on inclined surface is not well understood yet.…”

Section: Introductionmentioning

confidence: 99%

Effect of nucleation and icing evolution on run-back freezing of supercooled water droplet

Sun

Kong

Wang

et al. 2019

View full text Add to dashboard Cite

Supercooled large droplet (SLD), which can cause run-back ridged ice, will affect the aerodynamic performance of aircraft and poses a serious threat to aircraft safety. However, there is little knowledge about the abnormal run-back icing mechanism, which is vital for the development of aircraft anti-icing technologies. The flow and freezing of supercooled droplet impinging on inclined surface can help us better understand the run-back icing of SLD, especially the coupling of water flow and phase change in the freezing process. This paper experimentally investigates the freezing behavior of supercooled water droplet impinging on inclined surface. By observing the processes of water flow, ice formation and growth with a high-speed camera, the overflow distance and the freezing time are recorded with different temperatures. Different from previous discoveries that droplet freezes as the form of two smaller droplets on an inclined surface, we found two new frozen morphologies under the condition of short nucleation time: ellipse and slender strip, when the supercooling is high and low, respectively. The overflow distance and freezing time will increase with the decrease of ice growth rate, when supercooling decreases. And the freezing time will increase dramatically when the supercooling is low enough. Finally, the mechanism of run-back freezing of droplet based on the nucleation and icing evolution is discussed. Droplet impact on the inclined surface will result in large overflow distance when it nucleates after its retraction stage.

show abstract

“…The other particular interest for the present paper is the water-air interface reconstruction of wind-driven thin water film flows. Although there are some theoretical and numerical investigations on the shear stress driven water film flows ( Boomkamp et al1997, Rothmayer et al2002, Wang and Rothmayer 2009, Marshall and Ettema 2004, the experimental investigations on wind-driven thin film flows are seldom found (Marshall andEttema 2004, Shaikh andSiddiqui 2010). In this paper, the cross correlation based DFP measurement system was applied to free surface measurement of thin water film flows, which were generated by a small wind tunnel with different airflow velocities and different water flow rates.…”

Section: Introductionmentioning

confidence: 99%

Development of a Digital Image Projection Technique to Measure Wind-Driven Water Film Flows

Zhang

et al. 2013

51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

View full text Add to dashboard Cite

Digital fringe projection (DFP) profilometry has been widely used to generate threedimensional (3D) surface information. In this work, a novel 3D shape measurement system based on DFP technique is proposed for accurate and quick thin film/rivulet flow measurement. The key concept of the technique is making use of digital image correlation (DIC) algorithm to direct calculate the projected grid points' displacements. In comparison to fourier transformation based DFP system, it gives more accurate measurement result without rigid image quality requirement. This technique was applied to characterization of wind-driven thin film/rivulet flows that were formed in an open circuit wind tunnel. The film thickness and surface wave frequency had been evaluated for variety of wind speeds and flow rates. The results show that this technique successfully revealed the dynamic motion features of thin film flows.

show abstract

Thin water films driven by air shear stress through roughness

Cited by 21 publications

References 60 publications

On the Numerical Solution of Three-Dimensional Condensed Layer Films

On the Numerical Solution of Three-Dimensional Condensed Layer Films

Effect of nucleation and icing evolution on run-back freezing of supercooled water droplet

Development of a Digital Image Projection Technique to Measure Wind-Driven Water Film Flows

Contact Info

Product

Resources

About