Seminar on Blast Wave Mitigation by Aqueous Foams

Date: Friday 12 July 2019 to Friday 12 July 2019

Location : von Karman Institute for Fluid Dynamics, Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode
Contact : VKI secretariat, This email address is being protected from spambots. You need JavaScript enabled to view it.; Phone: +32 2 359 96 04

 
 

Seminar of Prof. Martin Monloubou from ENSTA Bretagne

Blast wave mitigation by aqueous foams

Friday 12th of July, 13:30-14:30 in the Navier Room

Free registration to This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Liquid foams, dispersion of a gas phase into a liquid phase, are used for many applications : cosmetics, food industry, oil recovery… Due to their excellent ability to dissipate energy, those materials are also used to mitigate blast effects. Over the past fifty years, several attenuation mechanisms were identified, however the foam parameters are poorly controlled in most of the studies. The understanding of the underlying dissipation mechanisms, and the effect of each foam parameter on the attenuation therefore remain an active matter of debate.


We address this issue by studying the the attenuation of a shock wave, created with a shock tube, in a liquid foam, whose parameters can be varied independently from one another. In a first part, I will show the significant effect of the foam liquid fraction on the pressure attenuation (plateau level and pressure rise time), and will briefly discuss the effect of bubble size and gas composition. In a second part, I will present results at the bubble scale: using a shadowgraph technique, we investigate the destabilization process of a soap bubble subject to a shock wave. 

https://www.researchgate.net/profile/Martin_Monloubou

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