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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.
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.
Gasoline Engine: Motored
Simcenter STAR-CCM+ In-cylinder provides an automated method to perform transient moving-mesh analyses of internal combustion engines.
Setting up the Piston Motion
Here, you set the length of the connecting rod, which directly affects the piston motion.

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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.
- 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.
  - Gasoline Engine: Motored
    Simcenter STAR-CCM+ In-cylinder provides an automated method to perform transient moving-mesh analyses of internal combustion engines.
    - Prerequisites
      This tutorial guides you through the setup of the gasoline engine simulation using the dedicated Simcenter STAR-CCM+ In-cylinder add-on in Simcenter STAR-CCM+.
    - Importing the Geometry
      You start the simulation setup from a CAD geometry in Parasolid format.
    - Creating a Half Engine Model
      To reduce cell count and computational costs, create a half model.
    - Setting the Initial Conditions
      You specify the initial conditions in the cylinder and ports using tables. A single table describes both absolute pressure and temperature as a function of crank angle. Simcenter STAR-CCM+ In-cylinder evaluates the initial values at the specified start angle (300 deg crank angle) using linear interpolation between the data points.
    - Setting up the Piston Motion
      Here, you set the length of the connecting rod, which directly affects the piston motion.
    - Setting the Inlet and Outlet Boundary Conditions
      You set the boundary conditions for the inlet and the outlet using the previously imported files intakePort1_Inlet.csv and exhaustPort1_Outlet.csv.
    - Setting Up the Valve Motions
      For the motion of the valves, you import tables that describe the valve lifts as a function of crank angle.
    - Defining Operating Conditions and Time-Step Size
      Here, you set the crank angle at which the simulation begins and the duration of the analysis. You enable automatic time-step control, which adjusts the time-step size based on preset valve lift thresholds.
    - Aiding Solution Convergence
      To aid solution convergence, you move the valve curtain interfaces to a position that is more suitable for this engine geometry.
    - Preparing the Plots and Scenes for Visualization
      Simcenter STAR-CCM+ In-cylinder provides several plots and scenes by default. To watch the solution develop, open the plots for cylinder turbulence kinetic energy and tumble-y. Also open the scenes for velocity magnitude and absolute pressure. Write the scenes to image files at regular intervals.
    - Running the Simulation
      The simulation is now set up and ready to run.
    - Analyzing the Results
      After the simulation is complete, you visualize the results.
    - Summary
      The Gasoline Engine tutorial uses a four-stroke gasoline engine to introduce various features of the Simcenter STAR-CCM+ In-cylinder add-on:
  - Gasoline Engine: Charge Motion
    Simcenter STAR-CCM+ In-cylinder provides methods for predicting the charge motion in an internal combustion engine, including the injection of liquid fuel, the subsequent evaporation and mixing process, and the formation of fuel film on the engine walls.
  - Gasoline Engine: ECFM-3Z Combustion
    In Simcenter STAR-CCM+ In-cylinder, you can simulate the combustion process in a gasoline engine using the Extended Coherent Flame Model Three Zone (ECFM-3Z).
  - Diesel Engine: Closed-Cycle Sector Model
    A closed-cycle analysis investigates the injection, ignition, and combustion process in an engine cylinder with all intake and exhaust valves closed. For axisymmetric cylinder geometries, Simcenter STAR-CCM+ In-cylinder allows you to model these stages of the engine cycle in a sector of the actual cylinder geometry in order to reduce runtime.
  - Uniflow Two-Stroke Engine
    Two-stroke engines complete the power cycle with two strokes of the piston while turning the crankshaft once (360 degrees). With Simcenter STAR-CCM+ In-cylinder, you can simulate different types of two-stroke engines—uniflow, loop flow, or cross flow engines.

Setting up the Piston Motion

Here, you set the length of the connecting rod, which directly affects the piston motion.

To set the connecting rod length:

In the Edit dialog for the cylinder, click the Motion tab.
Set Connecting Rod Length to 145.0 mm.
Click Apply, then Close.
Save the simulation .