ANSYS, Inc. Release Notes
ANSYS, Inc. Release Notes
IC Engine is a new analysis system for release 14.0. It is a customized tool for setting up and solving the flow inside an IC Engine with moving geometry. It is used for the quantification of flow rate, swirl and tumble, and other flow parameters during the engine cycle. The IC Engine system uses the ANSYS FLUENT solver for fluid flow analysis.
Modeling in-cylinder simulations has been a complex and time consuming task, because specific decomposition methods are required for modeling the motion of the valves and piston. Manual decomposition and meshing can take from 6 hours to a couple of days. Furthermore, getting all the required inputs to accurately model the physics in the in-cylinder simulation is tedious and difficult.
The IC Engine reduces the time for setting up the in-cylinder simulation from a few hours to a few minutes by automating the decomposition of the geometry and the mesh generation. The dynamic mesh setup and solver setup are also done automatically. The IC Engine system requires minimum inputs to complete the simulation. This significantly reduces the effort required to setup the IC Engine case and eliminates the need for a long, tedious, and error prone manual preparation of the geometry, mesh, and solver set up.
IC Engine System Properties
Engine Inputs: A centralized engine specific data management is implemented for all the engine parameters like connecting rod length, crank radius, valve and piston-motion profile, engine speed, and also piston offset.
All the engine inputs are parametrized.
Solver Setup: During the geometry preparation, the IC Engine system automatically writes down all the required inputs for dynamic mesh setup and also provides a default set of boundary conditions.
Journal Customization: The IC Engine system provides a mechanism to control simulation using journal hooks during different phases of simulation.
Geometry
A dedicated feature is included in the Design Modeler to capture the IC Engine geometry inputs.
You can animate the valve motion, piston motion, and the spray cone during the entire cycle of simulation at the geometry level.
You can have automatic geometry decomposition, depending on the engine type for the IC Engine simulation.
You can perform geometry decomposition at different crank angles.
Geometry data required for the IC Engine Setup is automatically generated.
Mesh
A dedicated user interface is provided to control the mesh parameters for generating the IC Engine specific mesh.
The system uses the named selection created in the decomposition to identify different zones and automatically assigns appropriate mesh algorithms and required mesh controls.
Mesh quality is improved by creating automatic virtual topology and pinch controls.
Solver
The system automatically validates the different mesh zones required for the given type of engine.
The system automatically creates grid interfaces.
The system automatically sets up the various dynamic mesh controls, zones, and events.
The system automatically sets up the models, boundary conditions, default monitors and user defined settings, depending on the simulation type.
You can customize the simulation using the journal hooks.
Postprocessing
The system automatically generates an IC Engine specific report.
It creates animations of the mesh and velocity contours as the solution progresses.
You can enhance the default report with the custom images generated in CFD-Post.
The system creates the charts for swirl and tumble.
The system automatically creates the contour images at different crank angles.