Comparisons of Different Precision WENO Schemes for Simulating Blast Load of Gas Cloud Explosion inside a Cabin

In the present work, we developed a high-resolution 3D code based on the FORTRAN platform to investigate the influence of accuracy of WENO schemes on the blast load generated by gas cloud explosion inside a cabin.The 3th, 5th, 7th and 9th WENO finite difference schemes were implemented in the code to capture the shock waves.Several one dimensional Riemann problems such as Sod shock tube and shock-entropy wave interaction were simulated to investigate the computing performance of the schemes preliminarily and validate the developed code.Then, the validated code was used to conduct the simulation of the gas cloud explosion inside a closed cabin and a venting cabin and the influence of the accuracy of WENO schemes on the blast load was discussed as well.The researches indicate that the blast load generated by gas cloud explosion inside the cabin mainly contains multiple peaks shock waves and long duration quasi-static overpressure.The accuracy of WENO schemes has considerable influence on the blast waves and higher order scheme gives sharper pressure peaks, whereas it has much less influence on the quasi-static overpressure.