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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.
Electromagnetism
The following tutorials illustrate features for solving problems that involve electromagnetic fields.
Airgap Remeshing: Electronic Speedometer
Electric machine simulations require a conformal mesh at the interfaces between different components. Airgap remeshing is a meshing technique that allows you to generate and maintain conformal meshes between regions that are in relative motion.
Defining the Physics of the Air Regions
As you are only interested in the magnetic potential solution, you model the air regions as a gas without selecting any flow model. Modeling air using a flow solver would require solving the equations of flow, which is not necessary in this case. For airgap remeshing, you require the Airgap Remeshing model.

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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.
  - Ohmic Heating: Domestic Fuse
    This tutorial demonstrates some of the capabilities of the Ohmic Heating model available in Simcenter STAR-CCM+.
  - Magnetic Vector Potential: Axial Flux Motor
    This tutorial demonstrates how to use the Finite Element Magnetic Potential Vector model to solve for the magnetic flux produced by the magnets of an axial-flux motor.
  - Magnetohydrodynamics: Stirring Induced by Excitation Coils
    In this tutorial, you simulate the electromagnetic stirring of molten metal induced by excitation coils.
  - Airgap Remeshing: Electronic Speedometer
    Electric machine simulations require a conformal mesh at the interfaces between different components. Airgap remeshing is a meshing technique that allows you to generate and maintain conformal meshes between regions that are in relative motion.
    - Prerequisites
      To complete this tutorial, you require a double-precision version of Simcenter STAR-CCM+. Also, the instructions in this tutorial assume that you are already familiar with certain techniques in Simcenter STAR-CCM+.
    - Loading the Initial Simulation
      For this tutorial, you are provided with a starting simulation that includes the CAD model and regions that represent the magnet, the coils, and the main air domain.
    - Defining the Rotation Motion
      The magnet and the surrounding air rotate rigidly at 1 rps. Define the rotation motion and create a local coordinate system that follows the rotation.
    - Defining Mesh Operations for the Airgap
      In electric machine applications, it is common to generate a tetrahedral mesh for parts with a complex geometry and then extrude it to the parts that have a more regular geometry. For illustration purposes, this tutorial adopts the same meshing strategy, although this simple geometry could be meshed directly using the directed mesher.
    - Defining the Magnet Physics
      Select the physics models that define the magnet physics. To account for the rotation of the magnet, you define the magnetization direction in a local coordinate system that follows its motion.
    - Defining the Coils Physics
      Select the physics models for the excitation coils and define region settings.
    - Defining the Physics of the Air Regions
      As you are only interested in the magnetic potential solution, you model the air regions as a gas without selecting any flow model. Modeling air using a flow solver would require solving the equations of flow, which is not necessary in this case. For airgap remeshing, you require the Airgap Remeshing model.
    - Creating the Airgap Regions
      For the airgap, you require two regions—one region that rotates with the magnet and the surrounding air region, and a stationary region.
    - Generating the Mesh
      Generate the mesh and visualize it in a mesh scene.
    - Creating the Interfaces
      Setting up a simulation with airgap remeshing requires that you manually define interfaces. For airgap remeshing, you require a repeating interface between the airgap regions.
    - Creating Scenes and Reports
      For visualization, create reports for the magnetic flux linkage in the coils and the voltage induced in the coils by the magnet motion. Also create a vector scene that displays the magnetic flux density.
    - Running the Simulation
      Before you run the simulation, check that the interfaces are correctly defined and that the mesh is conformal.
    - Summary
      This tutorial demonstrated how to use the Airgap Remeshing model.
  - Higher Order Magnetic Vector Potential: Axial Flux Motor
    Axial flux motors have, over recent years, become increasingly more popular for aerospace and automotive applications. One of the main advantages of axial flux motors is their high power density, which allows for high efficiency in compact designs.
  - Electric Circuits: Full-Wave Rectifier
    In power electronics, a full-wave rectifier provides rectification from an AC (Alternating Current) wave to a DC supply. Simcenter STAR-CCM+ provides simulation capabilities that allow you to investigate the effect of circuit component choices on the electromagnetic performance of such devices.
- 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.

Defining the Physics of the Air Regions

As you are only interested in the magnetic potential solution, you model the air regions as a gas without selecting any flow model. Modeling air using a flow solver would require solving the equations of flow, which is not necessary in this case. For airgap remeshing, you require the Airgap Remeshing model.

The starting simulation already contains a physics continuum for the air regions. This continuum is assigned to the rotating and fixed air regions and to the airgap regions.

Rename the Continua > Void node to Air.

For the physics continuum, Air, select the following models:


Group box	Physics Model
Space	Three Dimensional (preselected)
Time	Implicit Unsteady
Material	Gas
Optional Models	Electromagnetism
Enabled Models	Gradients (selected automatically)
Electromagnetism	Finite Element Magnetic Vector Potential
Optional Models	Eddy Current Suppression (selected automatically)
Optional Models	Airgap Remeshing

At every time-step, Simcenter STAR-CCM+ remeshes the airgap regions, whereas the rest of the mesh remains fixed. The entire mesh remains conformal throughout the operation.

The Airgap Remeshing model requires you to specify the mesh operation that is executed at every time-step. When the meshing pipeline for the airgap includes multiple dependent operations, you only specify the last operation that is executed, which, in this simulation, is the volume extruder. At every time-step, Simcenter STAR-CCM+ automatically finds all dependencies and execute the required operations in order:

Select the Continua > Air > Models > Airgap Remeshing node and set Mesh Operations to Airgap Volume Extruder.
At every time-step, Simcenter STAR-CCM+ executes all mesh operations from the motion-driven transform to the volume extrusion.

The default boundary conditions are appropriate.
Save the simulation.