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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.
Heat Transfer and Radiation
The tutorials in this set illustrate various Simcenter STAR-CCM+ features for heat transfer, radiation, and thermal comfort.
Simulation Operations: Multi-Timescale Conjugate Heat Transfer
Through simulation operations, Simcenter STAR-CCM+ provides an automated methodology by which you can include a multiple time-scale workflow in a single simulation.
Selecting Physics Models for the Exhaust Gas

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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.
  - Conjugate Heat Transfer: Heated Fin Introduction
    This tutorial incorporates both multi-region conjugate heat transfer and natural convection in a Simcenter STAR-CCM+ simulation.
  - Simulation Operations: Multi-Timescale Conjugate Heat Transfer
    Through simulation operations, Simcenter STAR-CCM+ provides an automated methodology by which you can include a multiple time-scale workflow in a single simulation.
    - Importing the Surface Mesh
      The provided file, multiTimeScaleCHT_geom.x_b, contains a fluid part and a solid part and the interface between them. To set up the Simcenter STAR-CCM+ simulation, first launch a new simulation and import the supplied geometry.
    - Creating the Fluid and Solid Regions
      This simulation requires one fluid region and one solid region. These regions are created from the imported parts by assigning the imported parts to regions. The interface between them is automatically generated since the contact is already defined in the imported surfaces.
    - Defining Mesh Operations
      To avoid unnecessary data interpolation across the solid-fluid interface, you are advised to generate conformal interfaces if possible. To achieve this, all regions must be meshed within the same mesh operation without activating Per-Part Meshing.
    - Selecting Physics Models for the Exhaust Gas
    - Selecting the Physics Models for the Solid Manifold
    - Defining the Explicit Mapped Contact Interface
      In an implicit CHT simulation, the heat transfer is solved through contact interfaces without any mapping procedure. However, a multi-timescale simulation solves the two regions consecutively. The energy coupling is achieved using an explicit mapped contact interface where the Boundary Heat Flux and Specified Y+ Heat Transfer Coefficient are exchanged across the interface.
    - Specifying Boundary Conditions
      To simplify the scenario being modeled, for the fluid region you define constant temperature and constant velocity at the inlet.
    - Specifying Steady and Unsteady Solution Controls
      In this multi-timescale simulation the steady solver and the implicit unsteady solver are run alternately. You define one stopping criterion for each solver as well as a global stopping criterion.
    - Creating Mesh Thresholds for Post-processing
      You create two mesh thresholds to display the temperature in the exhaust manifold volume.
    - Visualizing the Temperature
      Here you create 3 reports and 1 scene by which to visualize the temperature.
    - Setting Up a Workflow in Simulation Operations
      Simulation operations allow you to automate tasks within Simcenter STAR-CCM+. In this tutorial, you use simulation operations to switch between solvers for the fluid and solid continua and so respect their timescales without requiring co-simulation.
    - Running the Simulation
      You define 3 reports to monitor the run progress for a multi-timescale simulation. One report outputs the current coupling cycle. The other two count the iteration numbers for the fluid and solid thermal solutions respectively.
    - Analyzing the Simulation Results
      The heating process of the exhaust manifold can be visualized through the temperature scene and its embedded plot.
  - Simulation Operations: Transient-transient Multi-Timescale Conjugate Heat Transfer
    An important analysis for automotive applications is to simulate the thermal behavior of components during cold-start conditions. As the timescales involved in fluctuating fluid behavior often varies significantly from the timescales in solid thermal behavior, it is not efficient to run an implicitly coupled conjugate heat transfer simulation. Simcenter STAR-CCM+ provides a coupling strategy that permits distinct transient timescales for the solid and fluid components.
  - Multi-Part Solid: Graphics Card Cooling
    This tutorial demonstrates how you can model multiple solid parts in a single continuum using the Multi-Part Solid physics model.
  - Natural Convection: Concentric Cylinders Introduction
    This tutorial demonstrates how to solve a natural convection problem in Simcenter STAR-CCM+.
  - Electronics Cooling Toolset: Natural Convection JEDEC
    Although many electronic devices benefit from cooling fans in removing excess heat, some devices rely on natural convection only. The Electronics Cooling Toolset includes a method for estimating cooling due to natural convection.
  - Electronics Cooling Toolset: Graphics Card Cooling
    When you are positioning fans that cool electronic components, the Electronics Cooling Toolset allows you to assess the impact that they have on removing heat. By comparing multiple designs, you can decide which arrangement gives you the best performance.
  - Dual Stream Heat Exchanger: Car Radiator
    Heat exchangers are devices that efficiently transfer heat from one medium to another. Some prominent examples of heat exchanger applications include car radiators, such as the one used in this tutorial, power plants and air-conditioning.
  - Surface-to-Surface Radiation: Thermal Insulator
    This tutorial incorporates gray thermal radiation in a Simcenter STAR-CCM+ simulation.
  - Multiband Surface-to-Surface Radiation: Solar Collector
    This tutorial uses the simulation created for the Surface-to-Surface Radiation: Thermal Insulator.
  - Photon Monte Carlo Radiation: Headlamp
    Thermal management simulations of headlamp applications allow you to identify temperature hotspots that can cause damage to the headlamp. Modifying the design—for example, including heat shields in the right places—leads to better and more durable designs.
  - Thermal Comfort: Car Cabin
    Comfort is one of the main factors that consumers consider when deciding how they travel. Therefore, passenger comfort is one of the key criteria that influence the design process of enclosed spaces such as a car or aircraft cabin.
  - Parts-Based Shells: Exhaust Pipe
    Simcenter STAR-CCM+ provides support for thin-walled structures that are best represented by a single-cell layer during simulation. These single-cell layers are known as shells. One of the main advantages of using shell elements is that it reduces the computational time and resources required for simulations.
- 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.

Selecting Physics Models for the Exhaust Gas

The main phenomena solved for is the heat transfer coupling between hot exhaust gas, (solved as steady), and the manifold component, (solved as transient). Therefore, two physics continua are required. First, you define a physics continuum for the exhaust gas.

To select the physics models for the exhaust gas:

Rename the Physics 1 continuum, Thermal Analysis - Gas Physics.

For the physics continuum, Continua > Thermal Analysis - Gas Physics, select the following models in order:


Group Box	Model
Space	Three Dimensional
Time	Steady
Material	Gas
Flow	Segregated Flow
Equation of State	Ideal Gas
Energy	Segregated Fluid Temperature
Viscous Regime	Turbulent Reynolds-Averaged Navier-Stokes (selected automatically)
Reynolds-Averaged Turbulence	K-Epsilon Turbulence Two-Layer All y+ Wall Treatment (selected automatically) Wall Distance (selected automatically) Realizable K-Epsilon Two-Layer (selected automatically)

To review the models, open the Thermal Analysis - Gas Physics > Models node.
Select the Continua > Thermal Analysis - Gas Physics > Initial Conditions > Static Temperature node and set Value to 500.0 K.
Save the simulation.