Fundamentals in unsteady fluid fragmentation from drop impact

Fluid fragmentation is ubiquitous in industrial, agricultural and natural settings. An important class of fragmentation processes is unsteady, continuously generating droplets of properties that vary over time. Yet, the dynamics of unsteady fragmentation has received little attention thus far. Common examples of unsteady fragmentation are splashes created upon drop impact on either a liquid pool or a solid surface. Upon impact, the drop is converted to a thin liquid sheet extending in the air and bounded by a thick rim. Hydrodynamic instabilities destabilize the rim: it develops corrugations that grow into ligaments which finally fragment into secondary droplets. Prior investigations of drop impacts have focused on the sheet dynamics but mostly overlooked its role on the final and most important outcome: secondary droplets and their formation. In this thesis, we study a two-dimensional unsteady fragmentation process upon drop impact on a small target.

Name thesis:degree_name

Doctoral

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Civil and Environmental Engineering

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2021

Author dc:creator

• Wang, Yongji,Ph. D.Massachusetts Institute of Technology.

Advisor dc:contributor.advisor

• Lydia Bourouiba.

• Civil and Environmental Engineering.

Statement dc:rights

• MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/130811

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/130811