Publications

Evaporation of sessile droplets with a small contact angle (below 90°) is studied here extensively on silicon substrates. We focused our work on the origin of the creation of watermarks on silicon wafers. A thorough understanding of droplet evaporation is of vital importance for examining the drying rate, the flow patterns observed inside drying drops, and the residual deposits. The concentration of each potential dissolved species (e.g. silica ...

The drying of sessile droplets represents an intriguing problem, being a simple experiment to perform but displaying complexities that are archetypical for many free surface and coating flows. Drying can leave behind distinct deposits of initially well dispersed colloidal matter. For example, in the case of the coffee ring effect, particles are left in a well-defined macroscopic pattern with particles accumulating at the edge, controlled by the ...

In geval van brand is rook de grootste doder. Rook kan worden afgevoerd met een natuurlijk of mechanisch ventilatiesysteem. Anderzijds kunnen er ook sprinklers of watermistsystemen worden ingezet als manier van actieve brandbeveiliging. De waterdruppels kunnen echter de rook, die van nature uit door zijn warmte opstijgt, naar beneden trekken als gevolg van wrijvingseffecten en afkoeling van de rook. Deze neerwaartse rookverplaatsing kan een ...

Evaporation of unpinned sessile droplets with small contact angles (below 90°) is studied here extensively. We focused our work on the constant contact-angle mode in which the contact area of the droplet on the substrate decreases. A thorough understanding of droplet evaporation is of vital importance for examining the drying rate, the flow patterns observed inside drying drops, and the residual deposits. The concentration of each potential ...

© 2017 Elsevier Ltd The paper presents a detailed sensitivity analysis on the volume flux probability density function (PDF) to represent water spray patterns with computational fluid dynamics (CFD). The effects of the turbulent viscosity model and the cell size are also investigated. The test case considered herein is a 30° full cone water mist spray emerging from a nozzle that operates at a pressure of 750 kPa and delivers a water flow rate of ...

Due to recent advances in the field of virtual reality, the demand for immersive sound design has increased dramatically. While pre-recorded samples are a popular tool in this context, it has limited flexibility and user interactivity. We propose a real-time method that can synthesize fully immersive sounds of droplets falling in water. The physics of air bubbles produced in the liquid are considered in detail, and the sound samples are ...