Скачать или смотреть blastFoam | Thermal Effects from Explosions

The simulation shows a small hemispherical explosive charge detonating on the ground plane of a cuboid domain that contains randomly placed cylindrical obstacles. The temperature of the explosive fireball has been volume rendered and the primary shock front can be seen propagating away from the detonation. The thermal radiation dose is visualized on the ground plane and cylindrical obstacles using a grayscale color map.

We have been working to extend blastFoam to more accurately calculate the thermal effects associated with explosive detonations including both convective and radiative heat transfer from the fireball and detonation products.

This work has required two key components:

1. A thermodynamic model that can more accurately calculate temperature. Consequently, the eConst model (that assumes a constant value of specific heat), has been replaced by the janaf model that leverages temperature-based polynomials for the explosive detonation product mixture and ambient air.
2. The computation of thermal radiation from the explosive event. The fvDOM model has been included, and this converts a discretized sphere into a user defined number of rays and transports the intensity of each ray individually.

Application of this capability includes more accurately predicting the extent and severity of blast-induced burn injuries.