In-Cylinder Tools

In-Cylinder Engine (ICE) simulations often contain specialized requirements for analysis. EnSight’s Python tool capability allows users to develop their own custom operations to fulfill the requirements of the analysis. I have written an initial set of tools here called “In-Cylinder Tools”, which can be installed as UserDefinedTools in EnSight 10

In this set of tools, we have the following:

1. Calculate Swirl. This routine takes the currently selected parent part(s) (typically the fluid domain of the cylinder), and calculates Swirl Velocity based about the Z axis. Using the parent part, it also calculates an Constant Variable which is the Spatial Mean of Swirl, so that you could easily create a plot vs. time for the average swirl.

 

 

 

2. Calculate Tumble. This routine takes the currently selected parent part(s) (typically the fluid domain of the cylinder), and calculates a tumble velocity, using the current average height of the parent part. The routine automatically works through time to determine this tumble velocity using the new center reference point at each timestep, and creates a graph of tumble vs time.

 

 

 

3. Crank Angle Conversion tool. This converts an EnSight .case file which has been setup with Analysis_Time specified as degrees crank angle, and converts this to Analysis_Time in seconds (user provides RPM). This allows EnSight to compute Pathlines correctly, as all of the constituent variables have consistent units.

4. Spray.out reader. For users of Converge, this tool will read in the Spray.out file information into a series of queries that you can then automatically plot. This reader will also read other Converge .out files which confirm to the save format.

 

 

 

 

 

5. Particle Distribution Function. This routine operates on the Measured Data within EnSight, to determine a mass-based distribution of any measured data variable (like radius or temperature) within the time domain. Please refer to this previous Python Exchange article for further information on the intended uses and application of this routine. Previous article.

 

 

 

Please download these tools from the link below. Unzip the file, and place the directory into your .ensight100/extensions/user_defined/Tools/ directory, and restart EnSight. You should then see a new tool folder in your UserDefinedTools area with the above tools.

Should you require any assistance with the tools or modification of them to suit your particular needs, please do not hesitate to contact CEI.

Click here to download In_Cylinder_Tools

 

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