1 / 12

Mark Franken Muhammad Akram Reza Olesya Bliznyuk Pechun Tsai Sandra van der Graaf Sedat Tokgo

Workshop 1 (Room 331, Gratama): Contactline at micron and submicron scale and air entrainment: unresolved issues. Mark Franken Muhammad Akram Reza Olesya Bliznyuk Pechun Tsai Sandra van der Graaf Sedat Tokgo Tak Shing Chang Yves Pommeau. Facilitators: Jaap den Toonder, Ramin Badie.

colman
Download Presentation

Mark Franken Muhammad Akram Reza Olesya Bliznyuk Pechun Tsai Sandra van der Graaf Sedat Tokgo

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Workshop 1 (Room 331, Gratama):Contactline at micron and submicron scale and air entrainment: unresolved issues • Mark Franken • Muhammad Akram Reza • Olesya Bliznyuk • Pechun Tsai • Sandra van der Graaf • Sedat Tokgo • Tak Shing Chang • Yves Pommeau Facilitators: Jaap den Toonder, Ramin Badie

  2. Workshop 2 (Room 201):Inkjet Printing Facilitators: Hans Reinten, Herman Wijshoff

  3. Workshop 3 (room 363): Surface tension gradients • Facilitators: Alexander Zdravkov, Hein Castelijns • Chuangxin Zhao • Marco Baragona • Mariano Galvagno • Michael Kopf • Sebastiaan Schmieschek

  4. Workshop 4 (room 355): Thin layer breakup: prediction in mesoscopic domain • Facilitators: Michel Riepen, Christian Berendsen • Anton Darhuber • Berend Brasjen • Hyungsoo Kim • Jos Zeegers • Jung Min Oh • Maosheng Ren • Marleen van Aartrijk

  5. Workshop 1 (Room 331, Gratama):Contactline at micron and submicron scale and air entrainment: unresolved issues

  6. Length and Time Scales • At air entrainment during plunging of a plate in liquid bath contactline is no longer straight but zigzag • Entrainment of air at different length scales • Deposition speed of fluid vs. nanobubbles number density • Nanobubbles on photoresist • Multiscale and more on different length scales • Contactline dissipation at submicron scales • Real contact angle vs. apparent contact angle • Capillary waves on interfaces and contactline • Bubble formation upon impact of micron size drops on meniscus • Nucleation of films below transition (during withdrawing a plate from the bath)

  7. Geometry/Shape • How does the shape of two drop surfaces change at the time of collision? • What about the shape of the meniscus during drop impact and at different speeds?

  8. Surface Properties • Air entrainment for sliding drops on superhydrophobic surfaces and at different Reynolds number • Roughness: transition to Cassie-Baxter under movement • Hysteresis still not clarified well: not being able to predict based on first principles • Model for effect of random roughness • Contactline running over structures and air entrainment • coupling between defects and dynamics • Surface topography • Air entrainment at pinning

  9. Liquid properties • High index fluids • Heating effects due to dissipation • Coalescence and collision of two types of miscible fluids

  10. External forces • Hysteresis under ultrasound field (4X) • What is the effect of shaking • Electrostatic forces and contactline dynamics

  11. Non-coalescence; non-entrainment • Many experiments drops bounce on an oil bath when the bath is shaken (Couder); not understood why it only works for certain fluids • Dependence of entrainment on molecular weight of the gas; pressure forces?

  12. Others • What is the effect of precursor film: speed and entrainment • Why are nanobubbles stable • Why are nanobubbles formed • Wave break-up (into tiny drops); effect of capillarity • More equations on moving contactline: beyond lubrication approximation

More Related