# SIERRA/Aero Theory Manual Version 4.46.

## Abstract

SIERRA/Aero is a two and three dimensional, node-centered, edge-based finite volume code that approximates the compressible Navier-Stokes equations on unstructured meshes. It is applicable to inviscid and high Reynolds number laminar and turbulent flows. Currently, two classes of turbulence models are provided: Reynolds Averaged Navier-Stokes (RANS) and hybrid methods such as Detached Eddy Simulation (DES). Large Eddy Simulation (LES) models are currently under development. The gas may be modeled either as ideal, or as a non-equilibrium, chemically reacting mixture of ideal gases. This document describes the mathematical models contained in the code, as well as certain implementation details. First, the governing equations are presented, followed by a description of the spatial discretization. Next, the time discretization is described, and finally the boundary conditions. Throughout the document, SIERRA/ Aero is referred to simply as Aero for brevity.

- Authors:

- Publication Date:

- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)

- OSTI Identifier:
- 1397133

- Report Number(s):
- SAND-2017-10395

657297

- DOE Contract Number:
- AC04-94AL85000

- Resource Type:
- Technical Report

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 97 MATHEMATICS AND COMPUTING

### Citation Formats

```
Sierra Thermal/Fluid Team.
```*SIERRA/Aero Theory Manual Version 4.46.*. United States: N. p., 2017.
Web. doi:10.2172/1397133.

```
Sierra Thermal/Fluid Team.
```*SIERRA/Aero Theory Manual Version 4.46.*. United States. doi:10.2172/1397133.

```
Sierra Thermal/Fluid Team. Fri .
"SIERRA/Aero Theory Manual Version 4.46.". United States. doi:10.2172/1397133. https://www.osti.gov/servlets/purl/1397133.
```

```
@article{osti_1397133,
```

title = {SIERRA/Aero Theory Manual Version 4.46.},

author = {Sierra Thermal/Fluid Team},

abstractNote = {SIERRA/Aero is a two and three dimensional, node-centered, edge-based finite volume code that approximates the compressible Navier-Stokes equations on unstructured meshes. It is applicable to inviscid and high Reynolds number laminar and turbulent flows. Currently, two classes of turbulence models are provided: Reynolds Averaged Navier-Stokes (RANS) and hybrid methods such as Detached Eddy Simulation (DES). Large Eddy Simulation (LES) models are currently under development. The gas may be modeled either as ideal, or as a non-equilibrium, chemically reacting mixture of ideal gases. This document describes the mathematical models contained in the code, as well as certain implementation details. First, the governing equations are presented, followed by a description of the spatial discretization. Next, the time discretization is described, and finally the boundary conditions. Throughout the document, SIERRA/ Aero is referred to simply as Aero for brevity.},

doi = {10.2172/1397133},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2017},

month = {9}

}