Improvement in Explosive Performance Modeling with xHVRB

History Variable Reactive Burn (HVRB) has been a work horse model in CTH for shock-to-detonation transition simulations. xHVRB was proposed by Starkenberg [1] to capture more advanced reactive flow phenomena like explosive desensitization by extending HVRB to use captured shock pressure in addition to current pressure and introducing a pseudo-entropy term that can account for explosive pre-shock. xHVRB has been demonstrated to capture desensitization in multi-shock scenarios [2]. In this study, xHVRB is tested across other explosive phenomena: diameter effect, failure diameter, corner turning and thin pulse initiation. xHVRB shows an improvement in capturing additional explosive behaviors, including better detonation stability which is crucial for corner turning and diverging detonations in insensitive explosives.

[1] Starkenberg, IDS 15, p. 908

[2] Tuttle et. al, AIP 1979, 100044 (2018)