Home
Add-ons
Simcenter STAR-CCM+ comes with add-ons that provide a dedicated approach for simulations of specific engineering applications—the Electronics Cooling Toolset and the Simcenter STAR-CCM+ In-cylinder Solution.
Simcenter STAR-CCM+ In-cylinder Solution
Simcenter STAR-CCM+ In-cylinder Solution provides a simplified approach within Simcenter STAR-CCM+ to perform transient moving-mesh simulations of internal combustion engines (ICE).
Simcenter STAR-CCM+ In-cylinder Formulation
Solution Analysis

Share

Link: copied

Breadcrumb: copied

Add-ons
Simcenter STAR-CCM+ comes with add-ons that provide a dedicated approach for simulations of specific engineering applications—the Electronics Cooling Toolset and the Simcenter STAR-CCM+ In-cylinder Solution.
- Electronics Cooling Toolset
  The Electronics Cooling Toolset provides a simplified approach within Simcenter STAR-CCM+ to perform simulations of thermal management for electronics devices—from design to solution analysis.
- Simcenter STAR-CCM+ In-cylinder Solution
  Simcenter STAR-CCM+ In-cylinder Solution provides a simplified approach within Simcenter STAR-CCM+ to perform transient moving-mesh simulations of internal combustion engines (ICE).
  - ICE Mechanism
    The development and improvement of internal combustion engines comes from a systematic analysis of the in-cylinder flow. Simcenter STAR-CCM+ In-cylinder is capable of simulating the in-cylinder flow of reciprocating internal combustion engines that operate on a four-stroke or a two-stroke cycle at steady speed.
  - Geometry Requirements
    For the automated setup of an internal combustion engine in Simcenter STAR-CCM+ In-cylinder, the geometry that you import must meet certain criteria. These criteria concern the file format as well as the positions and names of bodies and faces.
  - Valves Motion
    Simcenter STAR-CCM+ In-cylinder models the motion of valves using valve lift curves.
  - Piston Motion
    To model the motion of the piston, Simcenter STAR-CCM+ In-cylinder requires specific information about the engine geometry.
  - Fuel Injection
    Simcenter STAR-CCM+ In-cylinder provides methods for predicting the charge motion in an internal combustion engine—from fuel injection to fuel evaporation to air-fuel vapor mixing.
  - Combustion and Ignition
    Simcenter STAR-CCM+ In-cylinder offers efficient methods for simulating the combustion process in an internal combustion engine.
  - Mesh Strategy
    Simcenter STAR-CCM+ In-cylinder generates a trimmed mesh with automatic volumetric refinements to account for various flow characteristics within the flow domain. For a cylinder sector model, Simcenter STAR-CCM+ In-cylinder generates an axisymmetric mesh.
  - Solution Analysis
    Simcenter STAR-CCM+ In-cylinder allows you to analyse the solution of an ICE simulation while the simulation is running as well as when the simulation completes.
  - Simcenter STAR-CCM+ In-cylinder Workflow
    To set up, run, and post-process an engine cycle problem in Simcenter STAR-CCM+ In-cylinder, you work through the nodes from top to bottom.
  - Simcenter STAR-CCM+ In-cylinder Troubleshooting
    If you encounter problems when setting up or running an ICE simulation, check these common problem scenarios for advice on how to proceed. Also consult the Knowledge Base on the Support Center portal.
  - Simcenter STAR-CCM+ In-cylinder Reference
    Simcenter STAR-CCM+ In-cylinder provides specific right-click actions and properties for the various objects in the object-tree.
  - Simcenter STAR-CCM+ In-cylinder Formulation
    - Automatic Composition Initialization
      Automatic Composition Initialization automatically obtains values for the mass fraction of chemical species that are present in the cylinder and the ports as a result of combustion.
    - Wall Treatment
      Simcenter STAR-CCM+ In-cylinder provides various wall treatment models for the calculation of the wall heat flux.
    - Solution Analysis
    - Bibliography
- Application Productivity Tools
  Application Productivity Tools (APTs) are specialized add-ons that allow you to focus on specific applications. These tools are available as plugins for Simcenter STAR-CCM+.

Solution Analysis

For solution analysis, Simcenter STAR-CCM+ In-cylinder calculates the apparent heat release rate, the net indicated mean effective pressure (IMEP), and specific emissions as follows:

Apparent Heat Release Rate

The apparent heat release rate is calculated from the cylinder volume at any crank angle along with the pressure data as:

Figure 1. EQUATION_DISPLAY

\frac{d q_{a}}{d t} = \frac{1}{γ - 1} V \frac{d p}{d t} + \frac{γ}{γ - 1} p \frac{d V}{d t}

(648)

with:

Figure 2. EQUATION_DISPLAY

q_{a} = q_{c} + q_{w} + q_{s}

(649)

Figure 3. EQUATION_DISPLAY

γ = \frac{C_{p}}{C_{v}}

(650)

where:

$q_{a}$ is the apparent heat release.
$q_{c}$ is the heat transfer due to combustion.
$q_{w}$ is the wall heat transfer.
$q_{s}$ is the heat transfer due to spray.
$γ$ is the specific heat ratio.
$C_{p}$ is the specific heat at constant pressure.
$C_{v}$ is the specific heat at constant volume.
$t$ is the time.
$p$ is the pressure.
$V$ is the cylinder volume.

IMEP

The indicated mean effective pressure is calculated as:

Figure 4. EQUATION_DISPLAY

I M E P = \frac{W_{N}}{D}

(651)

where the net indicated work/cycle (work done on the piston) is calculated as:

Figure 5. EQUATION_DISPLAY

W_{N} = \int_{c y l i n d e r} p d V

(652)

and $D$ is the cylinder displacement given by Eqn. (585).

Specific Emission

The specific CO emission and the specific NOx emission are calculated as:

Figure 6. EQUATION_DISPLAY

E_{s p e c i f i c} = {\begin{matrix} \frac{\int_{c y l i n d e r} ρ Y_{C O / N O x} d V}{I M E P \cdot D} \\ 0 \end{matrix} \begin{matrix} i f I M E P \cdot D > 0 \\ i f I M E P \cdot D \leq 0 \end{matrix}

(653)

where $Y_{C O / N O x}$ is the mass fraction of CO or NOx, respectively.