Home
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: 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.

Share

Link: copied

Breadcrumb: copied

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.
  - 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.
    - Loading the Starting File and Generating the Volume Mesh
      For this tutorial, you are provided with a simulation file that contains predefined objects.
    - Specifying Physics Models and Global Parameters
    - Configuring Energy Coupling Between Regions
      For CHT simulations where the same timescale applies in both regions, you can use an implicit solution procedure that solves equations in both regions simultaneously. When the timescales differ, however, you must solve equations in each region consecutively. For this reason, an explicit mapped interface is required that can also provide time-averaged data to the solid side.
    - Defining Transient Time Scales and Stopping Criteria
      The flow of exhaust gas and the heating of the solid manifold are both simulated with the implicit unsteady time solver using different time step sizes. Simcenter STAR-CCM+ handles multiple time step sizes using time scales—one time scale for each continuum.
    - Importing 1D Data as Table and Specifying the Boundary Conditions
      The exhaust manifold of this tutorial is part of a four-stroke four cylinder engine. Within one engine cycle the crankshaft completes two revolutions (720 deg). Mass flows and temperatures passing through exhaust runners and the pressure at the manifold outlet are time-dependent (crank angle dependent) quantities. These quantities are obtained from a 1D engine block simulation for one engine cycle.
    - Setting Up a Sequence in Simulation Operations
      In this tutorial, you use simulation operations to automate the switch between solving for the fluid and solving for the solid according to their respective time scales.
    - Running the Simulation
      Before running the simulation, you create one report for the volume-averaged fluid temperature. Another two reports are defined to monitor the boundary heat flux across the contact interface. One pre-defined report outputs the current coupling cycle.
    - Analyzing the Simulation Results
      The heating process of the exhaust manifold can be visualized through the temperature scene and the plots created in the previous step.
  - 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.

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.

This tutorial describes the use of the single simulation, multi-timescale conjugate heat transfer (CHT) method for the heating of an exhaust manifold in a cold-start scenario.

To capture the pulsated flow pattern, the exhaust gas is solved with a time step size corresponding to 2 degrees of crank angle, whereas the solid manifold is solved with a much larger time step size corresponding to 2 engine cycles.

The following table gives you an overview of the simulation:


	Solid Domain	Fluid Domain
Physics Models	Material: Ductile Iron Equation of State: Constant Density	Material: Air Equation of State: Ideal Gas Flow Regime: Turbulent
Boundary Conditions	Thermal specification for outer boundaries: Convection	Temperature at inlets: Time-accurate 1D table Mass flow at inlets: Time-accurate 1D table
Initialization	Temperature: 300 K	Temperature: 300 K
Type of Analysis	Transient (thermal process)	Transient (pulsated engine flow)
Discretization and Solution Method	Finite Volume (FV)	Finite Volume (FV)
Mesh	Polyhedral Cells	Polyhedral Cells