How to draw time varying graphs in cfd-post ?

Gourabc · January 27, 2017, 00:52

Hi, I am new to the forum and also somewhat new to CFD. I was working on a project on analysing blood flow in aneurysmic aortas and was able to setup a solve the transient solution using fluid flow flow(fluent). Before solving I had created a solution data export for the following variables :
1. Static pressure
2. Total Pressure
3. X Velocity
4. Y Velocity
5. Z Velocity
6. Wall Shear stress
After soving I had opened the results in CFD-post and could successfully run the timestep animations of velocities, pressure (as contours), and wall shear stress (as a surface group in the aneurysm wall). However I cannot plot the variation of wall shear stress with time. I tried to create a chart and specify the type as XY-Transient or Sequence, but could not specify any locations.
Capture.PNG
Can anyone suggest me a method of this plot. I even tried to create a surface monitor for wall shear stress with flow time but it showed 0 variation throughout the iteration which is obviously not true.

503131132 · January 27, 2017, 01:24

Change the type of the plot as XY histogram under the General tab, and then your Y axis will be time axis. Under X axis tab you can select which variable do you want to plot.

Regards

B.A.K

Gourabc · January 27, 2017, 02:13

Thanks. I tried the histogram plot. But it is showing only one value in each particular range. However in the surface group animation there are a number of contours varying with flow time.
Capture 2.jpg
Capture 3.jpg
The graph with which I want to compare is not a histogram looks somewhat like one of these:
Capture 4.PNG

Is there any way I can plot the values which are being animated in the wall shear stress (varying with timesteps) with time to get a curve like one shown above? Please help.

amwahba4 · August 7, 2020, 18:35

hey,

did u find how to get the time graph?

brunoc · August 9, 2020, 17:40

I hope they did, cause it's been 3 years

What was missing was that they needed to create a point (Location > Point) and then use that at the Location field.

Cheers.

January 27, 2017, 00:52	How to draw time varying graphs in cfd-post ?	#1
Gourabc New Member Gary Join Date: Jan 2017 Posts: 6 Rep Power: 9	Hi, I am new to the forum and also somewhat new to CFD. I was working on a project on analysing blood flow in aneurysmic aortas and was able to setup a solve the transient solution using fluid flow flow(fluent). Before solving I had created a solution data export for the following variables : 1. Static pressure 2. Total Pressure 3. X Velocity 4. Y Velocity 5. Z Velocity 6. Wall Shear stress After soving I had opened the results in CFD-post and could successfully run the timestep animations of velocities, pressure (as contours), and wall shear stress (as a surface group in the aneurysm wall). However I cannot plot the variation of wall shear stress with time. I tried to create a chart and specify the type as XY-Transient or Sequence, but could not specify any locations. Capture.PNG Can anyone suggest me a method of this plot. I even tried to create a surface monitor for wall shear stress with flow time but it showed 0 variation throughout the iteration which is obviously not true.

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January 27, 2017, 01:24		#2
503131132 New Member B.A.K Join Date: Jun 2015 Location: Ankara Posts: 6 Rep Power: 10	Change the type of the plot as XY histogram under the General tab, and then your Y axis will be time axis. Under X axis tab you can select which variable do you want to plot. Regards B.A.K

August 7, 2020, 18:35		#4
amwahba4 New Member wahba Join Date: Aug 2020 Posts: 4 Rep Power: 5	hey, did u find how to get the time graph?

August 9, 2020, 17:40		#5
brunoc Senior Member Bruno Join Date: Mar 2009 Location: Brazil Posts: 277 Rep Power: 21	I hope they did, cause it's been 3 years What was missing was that they needed to create a point (Location > Point) and then use that at the Location field. Cheers.