Gas cushioning in liquid-solid impacts

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution


The normal impact of a rigid, shallow body of small deadrise angle with an incompressible, inviscid liquid is investigated. Models of pre-impact air cushioning prior to touchdown are constructed for both parabolic and wedge shaped bodies. These models produce a system of integro-differential equations describing the free-surface and pressure evolution, which is investigated numerically. As impact approaches a pressure build-up occurs in the gas, as the gas is forced out of the path of impactor. This leads to pre-impact free-surface deformations, delays in touchdown and a pocket of gas trapped beneath the impactor, which have consequences for the post-touchdown impact behaviour.
Original languageEnglish
Title of host publicationProceedings of the 10th UK Conference on Boundary Integral Methods
EditorsPaul Harris
PublisherUniversity of Brighton
Number of pages10
ISBN (Print)978-1-910172-05-6
Publication statusPublished - 2015
EventThe Tenth UK Conference on Boundary Integral Methods - University of Brighton, Brighton, United Kingdom
Duration: 13 Jul 201514 Jul 2015
Conference number: 10


ConferenceThe Tenth UK Conference on Boundary Integral Methods
Abbreviated titleUKBIM10
Country/TerritoryUnited Kingdom
Internet address


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