Learning Forum

[colintho]

Good Evening,

 

I am trying to plot a graph of temperature against time for a point within a room that its temperature is being cooled over a 30min period.

I tried to plot this in the results section CFD-Post by doing the following:

•Insert>>Location>>Point

•Insert>>Chart

•Set as Transient

•X-axis set as time

•Y-axis set as temperature.

 

However when I plot this I get the following graph with only two data points when I actually ran the simulation for 1800 time steps! How do I get it to plot for all time steps rather than start and end temperature?

[Keyur Kanade]

before ruing in fluent, please set calculation activity. 

file - export - during calculation - solution data

set cfdpost for export. 

set frequency. 

if this helps you, please mark this post as 'is solution' to help others on forum.

 

 

https://www.youtube.com/watch?v=Mv7w2PBkf8M

[colintho]

Hey Kkande
Thanks for your reply, so I need to do this before running the simulation? Does that mean I must make a point in Fluent rather then add one in CFD Post?

Thanks

Colin

[Rob]

You can extract the data in CFD Post if you've saved all of the data sets. Not sure how you'd create the line plot of point data v time though. 

If you set this up in Fluent (just use a point monitor) and export the data to a file (read up on Report Definitions) before the run you can save out T v t on many points and plot later on. 

[colintho]

Just to feedback on this one in CFD Post this worked:

 •Insert>>Location>>Point

•Insert>>Chart

•Set as Transient

•X-axis set as time

•Y-axis set as temperature.

 

My issue was that I wasn't telling the calculation to auto save at however many time steps inside solution! Thanks