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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.
Reacting Flow
The tutorials in this set illustrate various Simcenter STAR-CCM+ features for simulating reacting flows such as combustion.
Flamelet Generated Manifold: Perfectly Premixed Combustion with Adaptive Meshing
This tutorial simulates lean perfectly-premixed propane combustion using the Flamelet Generated Manifold (FGM) model in a combustor where the flame is stabilized behind a V-shaped bluff body. The Large Eddy Simulation (LES) model is used to directly resolve the large scales of the turbulence, and model the small scale motions, in the flow domain.
Selecting the Physics Models
The Flamelet Generated Manifold (FGM) model assumes that the thermo-chemical states (temperature and species mass fractions) in a turbulent flame are similar to that in a laminar flame, and that these states can be parameterized by a small set of scalars, namely mixture fraction, reaction progress variable, and enthalpy. There are several models for the reaction progress source term, but in this Large Eddy Simulation (LES) the FGM Kinetic Rate model is used where the chemical rate is interpolated from the FGM table.

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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.
- 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.
  - Complex Chemistry: Methane-Air Jet Flame
    This tutorial demonstrates how to set up and solve a complex chemistry simulation to model finite-rate chemistry in a flame.
  - Spray Combustion: n-Dodecane
    In this tutorial, you simulate spray combustion using the Steady Laminar Flamelet (SLF) model with the Soot Method of Moments model.
  - Flamelet Generated Manifold: Perfectly Premixed Combustion with Adaptive Meshing
    This tutorial simulates lean perfectly-premixed propane combustion using the Flamelet Generated Manifold (FGM) model in a combustor where the flame is stabilized behind a V-shaped bluff body. The Large Eddy Simulation (LES) model is used to directly resolve the large scales of the turbulence, and model the small scale motions, in the flow domain.
    - Prerequisites
      The instructions in the Flamelet Generated Manifold: Premixed Propane tutorial assume that you are already familiar with certain techniques in Simcenter STAR-CCM+.
    - Loading the Starting File and Generating the Mesh
      To set up the Simcenter STAR-CCM+ simulation, launch a simulation and generate the volume mesh.
    - Selecting the Physics Models
      The Flamelet Generated Manifold (FGM) model assumes that the thermo-chemical states (temperature and species mass fractions) in a turbulent flame are similar to that in a laminar flame, and that these states can be parameterized by a small set of scalars, namely mixture fraction, reaction progress variable, and enthalpy. There are several models for the reaction progress source term, but in this Large Eddy Simulation (LES) the FGM Kinetic Rate model is used where the chemical rate is interpolated from the FGM table.
    - Setting Up Mesh Adaption for the Reacting Flow
      The Adaptive Mesh model uses reacting flow-specific mesh refinement criteria to determine where to refine or coarsen the mesh along the flame front and within the region of the flame.
    - Setting Initial Conditions
      The flame is ignited by initializing to a burnt composition. Since the fuel stream is defined later as a premixed mixture, the mixture fraction is specified as 1.0.
    - Generating the FGM Table
      You import the chemistry definition using Chemkin files, and build the FGM table in Simcenter STAR-CCM+.
    - Setting the Inflow Boundary Conditions
      All wall boundaries are adiabatic, no-slip walls with zero-flux for the scalars. Since these conditions are the defaults, no changes are required here. However, the inlet boundary conditions must be set.
    - Enhancing Convergence
      The default under-relaxation factors for the flow and turbulence equations are suitable. However, to aid convergence, you adjust the under-relaxation factors for the PISO Unsteady, Segregated Flow, and FGM Combustion models.
    - Setting Up Post-Processing
      You set up scalar scenes for temperature, propane mass fraction, progress variable, and the error indicator and refinement level for the adaptive mesh refinement.
    - Running the Simulation
      You set the stopping criteria to a maximum physical time to allow for about three flow throughs.
    - Visualizing the Results
      You view the results at the end of the simulation at t=0.09s.
    - Bibliography
  - Surface Chemistry: Methane on Platinum Oxidation
    This tutorial models methane on platinum oxidation using complex chemistry models.
  - Reacting Channels: Steam Methane Reforming
    In this tutorial, you use the Reacting Channel Coupling co-simulation model in Simcenter STAR-CCM+ to solve a reacting flow simulation using the same method as is required for systems such as: reformers, crackers, and process heaters.
  - Acoustic Modal Analysis: Thermo-Acoustic Stability of a Cylindrical Burner
    Thermo-acoustic instability, that is, large-amplitude pressure oscillations, can be encountered in many devices such as gas turbines, rocket engines, or combustors. The instabilities, which can have detrimental consequences, are excited by the feedback loop between the unsteady combustion and the natural acoustic modes of the devices.
  - Eddy Break-Up: Coal Combustion
    The combustion of pulverized coal is still one of the main primary energy conversion mechanisms worldwide.
  - Fire and Smoke Wizard: Steckler Room
    This tutorial demonstrates the Fire and Smoke Wizard. The geometry and fire settings closely resemble those Steckler reported, including radiation and wall heat absorption. This setup allows a preliminary comparison with experimental data.
- 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.

Selecting the Physics Models

The Flamelet Generated Manifold (FGM) model assumes that the thermo-chemical states (temperature and species mass fractions) in a turbulent flame are similar to that in a laminar flame, and that these states can be parameterized by a small set of scalars, namely mixture fraction, reaction progress variable, and enthalpy. There are several models for the reaction progress source term, but in this Large Eddy Simulation (LES) the FGM Kinetic Rate model is used where the chemical rate is interpolated from the FGM table.

Instead of modeling all of the turbulence within the V-shaped combustor, the LES model is used to directly resolve the large scales of the turbulence and only model the small-scale motions—in this case, using the WALE Subgrid Scale model.

For this transient simulation, the PISO Unsteady model is used to control the time-stepping. The Adaptive Mesh model provides the general framework for adaptive mesh refinement.

To select the physics models:

For the continuum, Physics 1, select the following models in order:


Group Box	Model
Space	Three Dimensional (selected automatically)
Time	PISO Unsteady
Material	Multi-Component Gas
Reaction Regime	Reacting
Reacting Flow Models	Flamelet
Flamelet Models	Flamelet Generated Manifold (FGM)
	FGM Reaction (selected automatically)
	Ideal Gas (selected automatically)
	Segregated Flow (selected automatically)
	Gradients (selected automatically)
	Turbulent (selected automatically)
	Segregated Fluid Enthalpy (selected automatically)
	Reynolds-Averaged Navier-Stokes (selected automatically)

In the Enabled Models group box, deselect Reynolds-Averaged Navier-Stokes, then select the following models in order:


Group Box	Model
Turbulence	Large Eddy Simulation
	WALE Subgrid Scale (selected automatically)
	Wall Distance (selected automatically)
	All y+Wall Treatment (selected automatically)
Progress Variable Source	FGM Kinetic Rate
Optional Models	Adaptive Mesh
Optional Models	Solution Interpolation

The species are not defined within the Multi-Component Gas model, as they are defined automatically when the FGM table is generated.

Click Close.
Save the simulation.
For further information about using the LES model, see the User Guide section, LES Guidelines.