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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.
Incompressible Flow
The tutorials in this set illustrate various Simcenter STAR-CCM+ features for incompressible fluid flows as well as porosity and solution recording
Steady Flow: Laminar and Turbulent Flow in an S-Bend
This tutorial demonstrates the flow of an incompressible gas through an s-bend of constant diameter (2 cm), for both laminar and turbulent flow. The first part of the tutorial covers the laminar flow, with a Reynolds number (Re) of 500, and the second part covers the turbulent flow, Re = 50,000. The same pipe geometry is used in both cases.
Changing to a Turbulent Flow
Edit the models, initial conditions, and boundary conditions to simulate a turbulent flow (Reynolds number = 50,000).
Modifying Initial Conditions and Boundary Settings
To achieve a turbulent flow (Re = 50,000) in the existing pipe, increase the velocity of the air to 42.9 m/s at the Initial Conditions node and at the Inlet boundary condition. Change the Turbulence Specification so that the turbulence intensity and length scale can be defined.

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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
  - Steady Flow: Lid-Driven Cavity Flow
    This tutorial demonstrates the performance of Simcenter STAR-CCM+ in solving a traditional square lid-driven cavity flow. The problem geometry consists of a two-dimensional 1 m² cavity. The cavity is covered by an impermeable wall that moves in the x-direction with constant velocity of 1 m/s. A stretched quadrilateral mesh with 6400 cells is used.
  - Steady Flow: Channel Flow with Multiple Meshes
    This tutorial describes a steady airflow simulation over an obstacle that is mounted at the bottom wall of a three-dimensional channel.
  - Steady Flow: Laminar and Turbulent Flow in an S-Bend
    This tutorial demonstrates the flow of an incompressible gas through an s-bend of constant diameter (2 cm), for both laminar and turbulent flow. The first part of the tutorial covers the laminar flow, with a Reynolds number (Re) of 500, and the second part covers the turbulent flow, Re = 50,000. The same pipe geometry is used in both cases.
    - Prerequisites
      The instructions in the Steady Flow: Laminar and Turbulent in an S-Bend tutorial assume that you are already familiar with certain techniques in Simcenter STAR-CCM+.
    - Creating the S-Bend Geometry
      Create a new simulation and use 3D-CAD to set up the geometry.
    - Creating a Geometry Part
      A new geometry part is created using the 3D-CAD model.
    - Assigning a Part to a New Region
    - Setting Up the Case
      In this first part of the tutorial, run the simulation using a steady state laminar flow (Re = 500).
    - Generating a Volume Mesh
      Generate a polyhedral mesh using the generalized cylindrical mesher.
    - Selecting Physics Models
      Select the models for the incompressible fluid.
    - Modifying Material Properties
      Set the values for the dynamic viscosity and density of air.
    - Setting Initial Conditions and Boundary Settings
      To achieve a Reynolds number of 500 for this gas and pipe diameter, you require a mean velocity of 0.429 m/s.
    - Preparing a Scalar Scene
      A scalar scene is created to show the velocity magnitude on a section plane through the center of the s-bend. Use this scene to visualize the solution while the simulation is running.
    - Setting Up Stopping Criteria
      Limit the number of iterations for the solver to 350.
    - Running the Simulation
      The simulation is now ready to be run.
    - Visualizing the Results
      Examine the scalar and vector scenes.
    - Changing to a Turbulent Flow
      Edit the models, initial conditions, and boundary conditions to simulate a turbulent flow (Reynolds number = 50,000).
      - Modifying the Physics Continuum
        Edit the physics models to represent turbulent flow.
      - Modifying Initial Conditions and Boundary Settings
        To achieve a turbulent flow (Re = 50,000) in the existing pipe, increase the velocity of the air to 42.9 m/s at the Initial Conditions node and at the Inlet boundary condition. Change the Turbulence Specification so that the turbulence intensity and length scale can be defined.
      - Extending the Stopping Criteria
        The turbulent flow requires a longer time to converge. Increasing the number of iterations to 700 gives the solver sufficient time to converge.
      - Clearing the Solution and Running the Simulation
        Clear the solution from the laminar flow before running the solver.
      - Visualizing the Results for the Turbulent Flow
        Examine the scalar and vector scenes.
    - Suggestions for Further Practice
      Try running the simulation with different initial and boundary conditions.
    - Summary
      This tutorial examined the flow of an incompressible fluid through an s-bend of constant diameter, at different Reynolds numbers.
  - Steady Flow: Backward Facing Step
    Steady flow over a backward facing step is a typical scenario to investigate the behaviour of reattaching flows. Understanding the behaviour of the flow is crucial for many applications such as designing heat exhangers, evalutating aerodynamic performance and improving flow control strategies.
  - Anisotropic Flow: Cyclone Separator
    The flow inside a cyclone separator is characterised by strong swirling motion and three-dimensional boundary layers. Properly accounting for these effects is a challenging problem for CFD simulations. This tutorial presents the initial step in setting up a coarse mesh cyclone flow simulation.
  - Porous Resistance: Isotropic Media
    This tutorial models flow through a catalyst geometry.
  - Porous Resistance: Orthotropic Media
    This tutorial solves the same problem as the Porous Resistance: Isotropic Media, except that the fluid in the porous region cannot flow in any direction other than the bulk flow (y-) direction.
  - Solution Recording and Playback: Vortex Shedding
    This tutorial demonstrates how to use the solution recording and playback module for capturing the results of transient phenomena.
  - Generalized Newtonian Fluid: Flow in a Static Mixer
    This tutorial demonstrates the process of setting up and analyzing the flow of a viscous fluid through a static mixer.
  - Viscoelastic Flow: Basic Extrusion
    This tutorial illustrates the extrusion of molten rubber through a die.
  - Material Calibration: Curve Fitting Non-Newtonian Model Parameters
    This tutorial illustrates the workflow for calibrating rheological model parameters from experimental rheological data through curve-fitting.
  - Polymer Melt Extrusion: Film Casting
    In industry, film casting is a common process for producing thin polymeric films. Cast films are used for applications such as food and textile packaging, stretch wraps, or plastic bags. Simcenter STAR-CCM+ provides a combination of the Film Casting model and the Free Surface model that allows you to simulate that process and to investigate the impact of various parameters on the resulting film.
- 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.
- 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.

Modifying Initial Conditions and Boundary Settings

To achieve a turbulent flow (Re = 50,000) in the existing pipe, increase the velocity of the air to 42.9 m/s at the Initial Conditions node and at the Inlet boundary condition. Change the Turbulence Specification so that the turbulence intensity and length scale can be defined.

Use the following steps:

Select the Continuum > Physics 1 > Initial Conditions > Velocity node and set the Value to [42.9, 0.0, 0.0] m/s.
Select the Turbulence Specification node and set its Method to Intensity + Length Scale.
The Turbulent Length Scale node is added to the object tree.

Set the following values:


Node	Property	Value
Turbulent Length Scale	Value	0.0014 m The turbulent length scale that is used in this case is approximately 7% of the hydraulic diameter, which for circular pipes is the same as the pipe diameter.
Turbulent Velocity Scale	Value	4.29 m/s The turbulent velocity scale that is used in this case is 10% of the free-stream velocity.
Turbulence Intensity	Value	0.12 The turbulence intensity is approximately 12% and was calculated using the following equation: Figure 1. EQUATION_DISPLAY $I = \sqrt{\frac{\frac{3}{2} v_{t}^{2}}{U^{2}}}$ (5242) where $I$ is the turbulence intensity, $v$ is the turbulent velocity scale, and $U$ is the free-stream velocity.

Use the same values at the Inlet boundary. Start by setting the Turbulence Specification to use Intensity + Length Scale.

Select the Regions > Fluid > Boundaries > Inlet > Physics Conditions > Turbulence Specification node and set the Method to Intensity + Length Scale.

Set the following values:


Node	Property	Value
Regions > Fluid > Boundaries > Inlet > Physics Values
Velocity Magnitude	Value	42.9 m/s
Turbulence Intensity	Value	0.12
Turbulent Length Scale	Value	0.0014 m