doi:10.3850/978-981-08-7724-8_10-06

ABSTRACT

This paper aims at contributing to the numerical design of mitigation devices against a blast wave using an internally pressurized membrane. A new two-dimensional axisymmetric simulation code coupling an Eulerian flow solver with a Lagrangian membrane dynamics solver was developed to simulate the interaction phenomena between the blast wave and the membrane. The coupled numerical code uses a ghostcell technique and a level set method to simulate the membrane deformation induced by an under-expanded jet flow. The numerical results of the membrane deformation and the shock structure around the membrane are in good agreement with the experimental data. To verify the blast wave mitigation effect of the membrane, a blast wave propagating in a two-room building separated by the membrane was conducted using the code under some assumptions. The result suggests that the internally pressurized membrane may become a promising device for blast wave mitigation in the future.

Keywords: Blast wave, Membrane, Numerical simulation, Ghost cell, Level set method.

© 2011 CPD Unit, University of Leeds