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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.
Aeroacoustics
The tutorials in this set illustrate various Simcenter STAR-CCM+ features for solving aeroacoustic simulations.
Broadband Models: Noise from a Cylinder (Preparation)
This tutorial demonstrates how to set up aeroacoustics problems in Simcenter STAR-CCM+. The flow around a cylinder is used in the simulation to describe the required steps.

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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.
  - Broadband Models: Noise from a Cylinder (Preparation)
    This tutorial demonstrates how to set up aeroacoustics problems in Simcenter STAR-CCM+. The flow around a cylinder is used in the simulation to describe the required steps.
    - Loading the Base Simulation
      A base simulation file has been prepared for this analysis. Continue by copying the file from the Simcenter STAR-CCM+ installation directory, starting the simulation, loading the base simulation file and saving it under a different file name.
    - Visualizing the Geometry
      Display the geometry scene.
    - Generating the Volume Mesh
      The meshing models and mesh reference values for this simulation have already been set up. A volumetric control has been created for mesh refinement, to capture the separation behind the cylinder, and to capture the vortex shedding.
    - Selecting Fluid Physics Models
    - Setting Global Initial Conditions
    - Defining Boundary Conditions
      It is only necessary to set the Mach number of the freestream boundary, as all other settings have acceptable default values.
    - Setting Up a Plane Section
      Create a plane section through the part with which to display the scalar and vector quantities while the solvers are running.
    - Setting Up Scalar Scenes
      Two scalar scenes are created.
    - Monitoring Force Coefficients
      By default Simcenter STAR-CCM+ provides a residuals plot which can be used to monitor the convergence of the solution. In addition to this, it is useful to create additional reports and monitors to help in assessing convergence.
    - Setting Stopping Criteria
      Set the Maximum Steps as stopping criterion for this simulation.
    - Running the Simulation
      Before running the simulation, reorder the mesh to optimize it for the solver.
    - Viewing the Results
      View the Velocity Magnitude Contour and Wall Y+ Contour scenes.
    - Applying the Broadband Noise Sources
      The Broadband Noise Source models are intended to be used as tools for qualifying a volume mesh before a transient acoustic analysis. They are applied in the post-processing stage of a preliminary steady analysis.
    - Results Analysis and Consequences
      The cylinder and cone refinements seem sufficient in terms of capturing the aeroacoustics sources behind the cylinder (as the Proudman source plot illustrates). Typically, however, the peak of the human hearing range is between 1-3 kHz. Therefore, refine the mesh further to increase the resolvable frequency.
    - Refining the Volume Mesh
      Continuing from the cylinder.sim file, you now create a cylindrical part, 0.02 m in radius, which defines the outer extent of the region to be refined.
    - Setting New Stopping Criteria
      Set a new value for Maximum Steps.
    - Running the Simulation
      The simulation is now ready to be run.
    - Viewing Results After Mesh Refinement
      Visualize the updated Mesh Frequency Cutoff scene in the Graphics window.
    - Summary
      This tutorial demonstrated how to set up aeroacoustics problems in Simcenter STAR-CCM+, using the flow around a cylinder.
  - DES and FW-H On-The-Fly: Noise from a Cylinder (Unsteady Analysis)
    In the previous section of this tutorial, you completed the steady-state analysis runs for qualifying the volume mesh. In this section, continuing from the previous simulation file, you set up the final transient run for an unsteady analysis of the near field and an FW-H analysis of the far field.
  - Ffowcs Williams-Hawkings: Sound Propagation
    This tutorial compares the Post FW-H model with the FW-H On-The-Fly model.
  - Signal Post-Processing: FFT and Wavenumber
    Several further analyses are possible using the simulation history file from the earlier tutorial, DES and FW-H On-The-Fly: Noise from a Cylinder (Unsteady Analysis). These analyses are covered in this tutorial.
  - Acoustic Wave Modeling: Noise from a Cylinder
    This tutorial demonstrates how to set up an acoustic wave simulation in Simcenter STAR-CCM+. The flow around a cylinder is used in the simulation to describe the required steps.
  - Lighthill Wave and Perturbed Convective Wave Modeling: Simplified HVAC Duct
    Noise generated by the air handling components in heating, ventilation, and air conditioning (HVAC) systems is a large contributor to interior cabin sound levels. Investigating the sources of noise and modifying the design accordingly, leads to better and quieter systems.
  - Sponge Layer Modeling: Simplified Tailpipe
    Unsteady aeroacoustics simulations require effective non-reflective boundary conditions to prevent spurious reflected acoustic waves from the boundaries of the computational domain interfering with the aeroacoustic results.
- 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.

Broadband Models: Noise from a Cylinder (Preparation)

This tutorial demonstrates how to set up aeroacoustics problems in Simcenter STAR-CCM+. The flow around a cylinder is used in the simulation to describe the required steps.

The simulation in this tutorial is an example of an application where the flow past a bluff body causes the shedding of unsteady vortices. The Reynolds number in this tutorial, 6.38E4, is in the subcritical range 300 < Re < 1.5E5. This indicates that the vortex shedding will be strong and periodic, exhibiting the familiar Karman vortex street. The onset of this phenomenon is inherently unpredictable.

The geometry is shown below.

The geometry consists of a cylinder, 20 mm in diameter, placed at the center of a three-dimensional circular computational domain, 0.6 m in diameter. The free-stream air velocity and temperature are set to be 50 m/s and 300K, respectively, corresponding to a Mach number of 0.144 (50.0/347.2) and a Reynolds number of 6.38E4 (1.184*50*0.02/1.85563E-5).

According to the recommended procedure, you first run in steady state to:

Use the broadband models to understand where the aeroacoustics sources are located and to indicate where the mesh needs refining.
Use the Mesh Frequency Cutoff estimator to prescribe the absolute cell size in the source region to satisfy frequency resolution requirements in transient flow.

Then, you activate an LES-based turbulence model in transient mode to capture the aeroacoustics sources directly and to:

Use the post-processing tools to perform spectral analysis.
Export the CFD fields for far-field noise propagation (suitable for non-compact sources).