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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.
Analysis Methods
The tutorials in this set illustrate various Simcenter STAR-CCM+ features for analysing and visualizing simulation data.
Field Histories: Pressure Time Derivative
A field history is a type of field monitor that stores a finite number of past values (or samples) of a field function, captured at moments defined by its update policy, for a given set of input regions or boundaries (or both).

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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.
  - Volume Rendering: Steckler Room
    This tutorial demonstrates the advanced post-processing capabilities of Simcenter STAR-CCM+ using the simulation file that was created in the tutorial, Fire and Smoke Wizard: Steckler Room. If your graphics card does not support volume rendering, activate advanced rendering for the relevant scene.
  - Data Focus: Thermal Comfort
    Data focus delivers a way to expose critical engineering results and improve decision making. It lets you select areas of interest within one or more plots and immediately visualize the data in those areas within connected scenes.
  - Simulation History: Lagrangian DEM on an Auger
    This tutorial demonstrates Simcenter STAR-CCM+ simulation histories with Lagrangian DEM, using an auger that moves biomass pellets of different sizes.
  - Field Histories: Pressure Time Derivative
    A field history is a type of field monitor that stores a finite number of past values (or samples) of a field function, captured at moments defined by its update policy, for a given set of input regions or boundaries (or both).
    - Prerequisites
      The instructions in this tutorial assume that you are already familiar with certain techniques in Simcenter STAR-CCM+.
    - Loading an Existing Simulation
      For this tutorial you start from an existing simulation file that contains objects and solution data from the tutorial, Rigid Body Motion: Rotating Fan.
    - Computing Mesh Velocity from Position History
      In order to compute the convective current due to mesh motion, you must compute the mesh velocity in each cell. A field history for position provides the data necessary for computing mesh velocity.
    - Computing Pressure-Time Derivative
      To prepare the rest of the calculation, you create a field history for pressure, along with field functions for the velocity-gradient term and the final pressure time derivative. As for the mesh velocity calculation, you use a stencil that covers two time-steps for greater accuracy and reduced noise.
    - Visualizing the Solution
      Create derived parts on which to calculate the pressure derivative, then set up a scalar scene to view it.
    - Running the Simulation
      The simulation is now ready to run.
    - Visualizing the Results
      You can visualize the pressure derivative scalar results for the converged solution.
  - Screenplay Animation: Assessing Vehicle Aerodynamics
    Screenplay is a post-processing tool in Simcenter STAR-CCM+ that provides keyframe animation techniques for creating analysis videos. Using the Screenplay editor, you define animation effects and movement, and then generate a final rendered video for sharing with project stakeholders.
  - Advanced Rendering: Ray Tracing
    Simcenter STAR-CCM+ provides advanced rendering capabilities that you can use to create scenes that resemble real-life images.
- 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.

Field Histories: Pressure Time Derivative

A field history is a type of field monitor that stores a finite number of past values (or samples) of a field function, captured at moments defined by its update policy, for a given set of input regions or boundaries (or both).

This tutorial demonstrates the field histories feature of Simcenter STAR-CCM+ using the simulation file that was created in the tutorial, Rigid Body Motion: Rotating Fan.

Field histories provide the ability to compute derivatives of solution quantities, for example using turbulent kinetic energy time derivatives to identify power fluctuations. A pressure time derivative, $d p / d t$ , can help investigate acoustics, among other uses.

In this tutorial, a pressure time derivative is calculated for a rotating radial fan [1002].

From basic transport equations, the substantial or material derivative for pressure is:

\frac{D p}{D t} = \frac{\partial p}{\partial t} + v \cdot \nabla p

Hence to obtain the pressure derivative in a simulation with mesh motion, you must evaluate:

\frac{\partial p}{\partial t} = \frac{D p}{D t} - v \cdot \nabla p

In order to compute the velocity-gradient term $v \cdot \nabla p$ , you must first obtain the mesh velocity in each cell. The mesh velocity in each cell can be obtained using a field history that samples Position, and for which the resulting field functions are the current time-step, HistoryofPositionSample0, and the two previous time-steps, HistoryofPositionSample1 and HistoryofPositionSample2. These are combined in a field function MeshVelocity as:

(3*$${HistoryofPositionSample0} - 4*$${HistoryofPositionSample1} + $${HistoryofPositionSample2})/(2*${TimeStep})

The velocity-gradient term can be computed by a field function, Pconvective_current:

dot($${MeshVelocity},grad(${Pressure}))

Where Pressure is the built-in solution field function.

For computing the final pressure time derivative d(Pressure)/dt, the expression is:

(3*${HistoryofPressureSample0} - 4*${HistoryofPressureSample1} + ${HistoryofPressureSample2})/(2*${TimeStep}) - ${Pconvective_current}

For MeshVelocity and d(Pressure)/dt, a second order backward-differencing formulation is used. This formulation comes from [1002].

[1002]

James, M.L., Smith, G.M., and Wolford, J.C. 1977. "Applied Numerical Methods for Digital Computation with FORTRAN and CSMP", 2nd ed. Harper & Row.