Validation of BLEVE events using the hybrid code exploCFD

Abstract

AbstractA hybrid (analytical‐numerical) method for the modeling of BLEVE events seems the most realistic approach given the complex coupled physical models required for a purely numerical approach. The code exploCFD employs just such a method for the calculation of events involving multiple types of explosions including BLEVEs whereby the results from an analytical model are fed into a CFD code to model the wider domain. The CFD code is configured as a 2D solver hence the methodology carries some uncertainty. So how do the results from a hybrid method compare with those obtained from experiments? Here we look at the BLEVE experiments of Birk and Vandersteen. We show that despite simplifications inherent in the methodology, which include the combining separate discrete events such as initial tank rupture, catastrophic failure and mixing and subsequent ignition into one equivalent event, exploCFD produces results which are in good agreement with the experimental peak pressures and impulses. The peak pressure is captured at locations 10, 20, 30, and 40 m from tank side and the impulse values also show good agreement. Surprisingly, the time histories also show better than expected agreement.