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Tutorials
Tutorials show you how to use Simcenter STAR-CCM+ for various applications in a step-by-step format with recommendations for setup, initialization and steps of the solution process specific to the application. Macro and simulation files are available for download for a large proportion of cases.
Compressible Flow
The tutorials in this set illustrate various Simcenter STAR-CCM+ features for compressible fluid flows as well as harmonic balance.
Transonic Flow: RAE2822 Airfoil
The tutorial simulates two-dimensional, turbulent, compressible, transonic air flow over an idealized airfoil.
Setting Initial Conditions
Specify the coordinate system and the velocity and temperature.

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Tutorials
Tutorials show you how to use Simcenter STAR-CCM+ for various applications in a step-by-step format with recommendations for setup, initialization and steps of the solution process specific to the application. Macro and simulation files are available for download for a large proportion of cases.
- Using Tutorial Macros and Files
  Macros, input files, and final simulation files for a range of tutorials are provided as an optional download package on the Support Center website. These macros and final simulation files are provided as an aid to the written tutorials, so that you can check your final results against the downloaded files, or against a simulation that is built and run using the macros.
- Introduction
  Welcome to the Simcenter STAR-CCM+ introductory tutorial. In this tutorial, you explore the important concepts and workflow. Complete this tutorial before attempting any others.
- Foundation Tutorials
  The foundation tutorials showcase the major features of Simcenter STAR-CCM+ in a series of short tutorials.
- Geometry
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for creating and working with parts and 3D-CAD.
- Mesh
  The tutorials in this set illustrate various STAR-CCM+ features for building CFD meshes.
- Incompressible Flow
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for incompressible fluid flows as well as porosity and solution recording
- Compressible Flow
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for compressible fluid flows as well as harmonic balance.
  - Subsonic Flow: NACA-Type Intake
    This tutorial illustrates how to solve a three-dimensional compressible flow problem using Simcenter STAR-CCM+.
  - Transonic Flow: RAE2822 Airfoil
    The tutorial simulates two-dimensional, turbulent, compressible, transonic air flow over an idealized airfoil.
    - Importing the Mesh and Naming the Simulation
      Create a new simulation, import the supplied mesh, and name the simulation aerofoil.sim.
    - Converting to a Two-Dimensional Mesh
      Convert the mesh region to a two-dimensions.
    - Selecting the Physics Models
      Models define the spatial and temporal solution methods and the physical properties of the flow. In this example, the flow is steady, turbulent, and compressible.
    - Setting Initial Conditions
      Specify the coordinate system and the velocity and temperature.
    - Setting Material Properties
      Set the material properties for gas and air.
    - Setting Boundary Conditions and Values
      Set the physical conditions at the domain boundaries.
    - Setting Stopping Criteria
      Set the maximum number of steps.
    - Visualizing and Initializing the Solution
      View the Mach number profile during the run to monitor the supersonic flow region above the airfoil.
    - Plotting Graphs
      Plot the lift and drag coefficients to determine when the analysis has converged.
    - Running the Simulation
      The simulation is ready to run.
    - Visualizing the Results
      The Scalar Scene 1 display shows the Mach number profile at the end of the run. The profile shows the transonic flow around the airfoil, including the shock wave above it.
    - Validating the Results
      Examine the XY plot and lift coefficient report.
    - Summary
      The Transonic Flow tutorial simulated two-dimensional, turbulent, compressible, transonic flow.
    - Airfoil Tutorial Bibliography
  - Transonic Flow: RAE2822 Airfoil Using Overset Mesh
    This tutorial demonstrates how to use an overset mesh to simulate transonic flow over the RAE2822 airfoil.
  - Anisotropic Volume Meshing: Onera M6 Wing
    When meshing aerospace geometries such as wings, propeller blades, or turbine blades, you are required to generate a very fine mesh that adequately captures the curvature of the leading and trailing edges. To help reduce the cell count while maintaining solution accuracy, Simcenter STAR-CCM+ provides an anisotropic meshing option by which you can refine these edges.
  - Adaptive Mesh Refinement: Hypersonic Flow
    Hypersonic flows and flight envelopes present unique challenges in Computational Flow Dynamics. The extreme gradients and shocks can push flow solvers to their limits and resolving the flow features, particularly shock formation, is of paramount importance in obtaining valid converged solutions. In Simcenter STAR-CCM+, you can apply Adaptive Mesh Refinement (AMR) to accurately resolve developing shocks using refinement based on solution gradients.
  - Harmonic Balance: Single Stage Periodic Flow
    The tutorial illustrates the steps necessary to simulate a single axial compressor blade row so that the effect of a periodic wake can be analyzed using the Harmonic Balance method.
  - Gas Turbine Aerodynamics: Post-Processing
    In turbomachinery studies, the analysis of the flow field throughout the blade passage requires advanced post processing methods.
- Heat Transfer and Radiation
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for heat transfer, radiation, and thermal comfort.
- Multiphase Flow
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for simulating multiphase fluid flow problems
- Discrete Element Method
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for simulating Discrete Element Method problems
- Motion
  The tutorials in this set illustrate various STAR-CCM+ features for simulating problems with moving geometries and meshes, dynamic fluid body interaction, and rigid body motion:
- Reacting Flow
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for simulating reacting flows such as combustion.
- Solid Stress
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for computing deformation, strain, and stresses in solid regions. They also show how such computations can be coupled to the fluid behavior in an analysis of fluid-structure interaction.
- Aeroacoustics
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for solving aeroacoustic simulations.
- Electromagnetism
  The following tutorials illustrate features for solving problems that involve electromagnetic fields.
- Electrochemistry
  The following tutorial demonstrates chemical reactions induced by an electrical current.
- Battery
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for setting up a battery model:
- Automation
  The tutorials in this set illustrate various Simcenter STAR-CCM+ automation and macro features.
- Design Exploration
  The tutorials in this set illustrate various features for running design exploration studies in Design Manager.
- Coupling with CAE Codes
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for coupling with CAE codes:
- Analysis Methods
  The tutorials in this set illustrate various Simcenter STAR-CCM+ features for analysing and visualizing simulation data.
- Simcenter STAR-CCM+ In-cylinder
  The tutorials in this set illustrate features for simulating internal combustion engines in Simcenter STAR-CCM+ using the dedicated add-on Simcenter STAR-CCM+ In-cylinder.

Setting Initial Conditions

Specify the coordinate system and the velocity and temperature.

The initial velocity field applies freestream conditions across the entire domain. The initial velocity of 252 m/s is calculated as:

u = M \sqrt{γ R T}

where the Mach number $M = 0.725$ , the ratio of specific heats $γ = 1.4$ , the specific gas constant for air $R$ = 287 J/kg-K and the temperature $T$ = 300 K.

To specify an angle of attack of 2.92° for the initial velocity, create a coordinate system.

Open the Tools node at the bottom of the simulation tree and right-click the Coordinate Systems > Laboratory > Local Coordinate Systems node.
Select New > Cartesian.
In the editor dialog, in the Axis Definition box, set the i Direction and j Direction components as follows:

Component X Y Z
i Direction 0.998702 0.050942 0
j Direction -0.050942 0.998702 0
Click Create, then Close.

A Cartesian 1 node is created within the Coordinate Systems node. The resulting Properties window is shown below.

This node now defines a coordinate system that, when viewed down the positive Z-axis, has its x- and y-axes rotated anti-clockwise through an angle of 2.92^o compared to the laboratory system.

Edit the Initial Conditions node and set the following properties:


Node	Property	Setting
Velocity	Coordinate System	Laboratory - > Cartesian 1
	Value	[252, 0.0] m/s
Static Temperature	Value	300 K

The default values for the remaining initial conditions are suitable for this problem.

Save the simulation.