Slamming Liquid Impact and the Mediating Role of Air

Research output: ThesisPhD Thesis - Research UT, graduation UT

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Abstract

The slamming of a liquid against another phase is a common sight in nature. It can vary in intensity from being relatively soft and harmless such as during the raindrops impacting on soil or insects. On the other hand, it can be particularly violent and dangerous in instances of waves impacting on solid structures, such as those found in offshore settings, and in the transport of liquid cargo.

It is an important concern to predict the intensity of impact reliably, for it has a direct bearing on the damage that is caused to a solid structure. The forces generated upon impact are an indicator of the intensity of impact. However, given an ambient condition, the interaction between the liquid phase and the surroundings plays an important role in influencing the shape of the liquid surface during all stages of impact. Consequently, the ambient conditions have an important, but often unclear influence on the slamming pressures generated.

In this thesis, the role of the ambient fluid in influencing slamming impact was elucidated in different scenarios by performing geometrically simplified experiments. It was shown that the flow of trapped ambient fluid can, at least in principle, be manipulated to potentially influence the loads as desired.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • van der Meer, Devaraj, Supervisor
  • Lohse, Detlef , Supervisor
Award date10 Jul 2020
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-5021-5
Electronic ISBNs978-90-365-5021-5
DOIs
Publication statusPublished - 10 Jul 2020

Keywords

  • liquid slamming
  • liquid impact
  • free surface instabilities
  • Wagner model
  • sloshing
  • air cushioning
  • deflectometry
  • water entry
  • impulsive flows
  • wedge slamming

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