Chapter 6	STAR SET-UP IN ES-ICE
	Time Step Control

Global settings

Under the Global settings menu option in the Post-setup view, select flow variables for which output values are required, as shown in Figure 6-23

• Set Sectors to 8 to split the valve curtain into eight discrete sections

Figure 6-23 Star Controls panel: Post-setup view of Global settings

Time Step Control

The Time step control view of the Star Controls panel allows you to enter different time step sizes for use at different times in the simulation. For example, a time step size suitable during combustion, during fuel spray injection, or before the valves open and close.

•Click Time step control on the left of the Star Controls panel (see Figure 6-24)

•Set Step to 0.1 degrees crank angle

•Ensure that the Use valves toggle button is selected. This will use a smaller time step size when valves are about to open or close

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STAR SET-UP IN ES-ICE	Chapter 6
Write Data

Figure 6-24 Star Controls panel: Time step control view

Write Data

The Write data view in the Star Controls panel performs the final operation of saving all data and preparing files for importing the es-ice model into pro-STAR.

The entry in the Data file box is the name of a file containing STAR user subroutines. Do not change this name (es-ice.inp), unless instructed to do so, as it causes STAR to fail.

The toggle buttons in the upper part of the panel refer to specific STAR user subroutines. Selecting any of them instructs es-ice to generate the corresponding subroutine automatically or use the pre-compiled plug-in libraries. Deselecting a button means you will have to supply this subroutine manually.

The Save decomposition options toggle button allows you to define your own decomposition options for running STAR in parallel, as opposed to the STAR solver defaults. The decomposition options are defined in the Decomposition panel described in Chapter 4, “Decomposition for Parallel Runs” of the User Guide.

To write the data files:

•Click Write data on the left of the Star Controls panel

•Ensure that the correct toggle buttons are selected, as shown in Figure 6-25

•Click Write data

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Chapter 6	STAR SET-UP IN ES-ICE
	Saving the Model

Figure 6-25 Star Controls panel: Write data view

Saving the Model

•In the Write Tool, enter save_es-ice.4-final and click Save

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