Plotting Pressure against Crank Angle Degrees in Fluent
goldencatto
Member Posts: 3
in Fluids
Hi, I’m trying to simulate a 60-degree sector mesh of a light duty diesel engine using FLUENT. I am using non-premixed combustion with pilot, main, and post injections. I need help on plotting the Pressure against Crank Angle Degrees but in the “Report Plot” under “Monitors”, there are only options for against flow-time or time step on the X-Axis label.
May I know how can I specifically ask FLUENT to plot against Crank Angle Degrees? Thank you in advance.
Answers
Crank angle is a function of time so you could create an expression. Note, as the crank will rotate many times it's not a good number to plot against. You can also write the data to a file for editing in Excel or the like later on.
Hi Sir, thank you for the reply. By creating an expression, do I have to do it by using the Expression Report Definition? Sorry, I'm quite new to Fluent
Either an expression (if it's available) using the Expression Manager or a custom field function. I'd export the data and use Excel to do the graphing as you can manipulate the x-axis to suit what you need.
Sorry Sir, but I dont quite understand the export part. Do I export the data using the File>Export>Data? Or do I use the "Write To File" option in Solution XY Plot (the x axis function would be direction vector instead of time-step or iterations though)? Thank you so much Sir for helping.
Write to File, this will give a space delimited text file. File - Export data would be used for surface and volume data for a range of formats.
if you want time or time step, You can find it report file. or in monitor ... it will write the values in a column while the time in another column