RECONASS blast test

Simulation of RECONASS 400kg TNT NEQ blast test. The charge is cylindrical and has a small Height of Burst (HOB). The simulation used 55 million cells and needed around half an hour to process on a laptop.


In collaboration with Arup, Viper undertook a CFD blast analysis of the tagic 2,750T ammonium nitrate Beirut explosion.

Blast analysis in a coffee break

Detonation of 750kg cuboid of ANFO explosive in a road tunnel. Compute time was 9 minutes.

Blast diffraction

Simulation of an end-detonated TNT block near a corner of a building. Pressure gauges around the corner of the structure were used to validate simulation results prior to conducting larger scale simulations of blast in more complex urban environments.

Thanks to Dr Piotr Sielicki from Poznań University of Technology for supplying physical test data.

Internal blast propagation

A detonation occurs in the large chamber on the right handside room. Particles show propagation of detonation products while the contours plotted on the floor show pressure and shock propagation. The doorway on the left-upper of the building permits venting to the surrounding environment.

Vapour cloud explosions

Viper::Blast makes use of the latest GPU accelerated technology, making it orders of magnitude faster than other solvers. Run millions of cells on your laptop, or billions in the cloud.  VCE deflagration/detonation and transitions can be modelled.