## This content will become publicly available on June 13, 2020

## On the Direct Construction of the Steady Traveling Solution to High Explosive Sandwich, Cylinder and Aquarium Tests via a Streamline Finite Volume Approximation

## Abstract

The cylinder, sandwich and aquarium tests are routine experiments used to investigate the performance of high explosives. Here, we present a solution technique which simulates these experiments as two dimensional problems in steady traveling coordinates. Using a coordinate system aligned with the streamlines of the flow, an efficient numerical scheme is developed which uses an approximate Riemann solver to model the change in state across streamlines. The technique can also accommodate arbitrary equations of state for the materials. Two verification exercises show that the algorithm converges at second order. Validation studies using the aquarium experiment agreed well with simulations, though the omission of a material strength model leads to some discrepancies between simulation and experiments for the cylinder test. This computational technique is able to predict the behavior of these common high explosive experiments on the order of minutes on a single processor with very fine spatial resolution, on the order of 10 μm.

- Authors:

- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

- Publication Date:

- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

- Sponsoring Org.:
- USDOE Office of Science (SC). Advanced Scientific Computing Research (ASCR) (SC-21); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)

- OSTI Identifier:
- 1529536

- Alternate Identifier(s):
- OSTI ID: 1530003

- Report Number(s):
- LA-UR-18-25298

Journal ID: ISSN 0021-9991

- Grant/Contract Number:
- 89233218CNA000001; AC52-06NA25396

- Resource Type:
- Accepted Manuscript

- Journal Name:
- Journal of Computational Physics

- Additional Journal Information:
- Journal Name: Journal of Computational Physics; Journal ID: ISSN 0021-9991

- Publisher:
- Elsevier

- Country of Publication:
- United States

- Language:
- English

- Subject:
- High Explosives; Approximate Riemann Solver

### Citation Formats

```
Andrews, Stephen A., and Aslam, Tariq. On the Direct Construction of the Steady Traveling Solution to High Explosive Sandwich, Cylinder and Aquarium Tests via a Streamline Finite Volume Approximation. United States: N. p., 2019.
Web. doi:10.1016/j.jcp.2019.06.029.
```

```
Andrews, Stephen A., & Aslam, Tariq. On the Direct Construction of the Steady Traveling Solution to High Explosive Sandwich, Cylinder and Aquarium Tests via a Streamline Finite Volume Approximation. United States. doi:10.1016/j.jcp.2019.06.029.
```

```
Andrews, Stephen A., and Aslam, Tariq. Thu .
"On the Direct Construction of the Steady Traveling Solution to High Explosive Sandwich, Cylinder and Aquarium Tests via a Streamline Finite Volume Approximation". United States. doi:10.1016/j.jcp.2019.06.029.
```

```
@article{osti_1529536,
```

title = {On the Direct Construction of the Steady Traveling Solution to High Explosive Sandwich, Cylinder and Aquarium Tests via a Streamline Finite Volume Approximation},

author = {Andrews, Stephen A. and Aslam, Tariq},

abstractNote = {The cylinder, sandwich and aquarium tests are routine experiments used to investigate the performance of high explosives. Here, we present a solution technique which simulates these experiments as two dimensional problems in steady traveling coordinates. Using a coordinate system aligned with the streamlines of the flow, an efficient numerical scheme is developed which uses an approximate Riemann solver to model the change in state across streamlines. The technique can also accommodate arbitrary equations of state for the materials. Two verification exercises show that the algorithm converges at second order. Validation studies using the aquarium experiment agreed well with simulations, though the omission of a material strength model leads to some discrepancies between simulation and experiments for the cylinder test. This computational technique is able to predict the behavior of these common high explosive experiments on the order of minutes on a single processor with very fine spatial resolution, on the order of 10 μm.},

doi = {10.1016/j.jcp.2019.06.029},

journal = {Journal of Computational Physics},

number = ,

volume = ,

place = {United States},

year = {2019},

month = {6}

}