Dear Mohammad Javad,

Can you understand the attached picture ?

1) use, Custom Field Functions to add your velocity function.

2) clink On to Data Sampling for Time Statistics with your desire Sampling Interval and mention the highlighted the function. as shown in the given picture.

3) go to In the initialize window and click on " Reset Statistics"

Good Luck

what do you mean by "Time-averaging" and "at different times".?

Hello Omer Musa

In an unsteady flow, i am going to draw mean velocity and RMS profiles ranged time from 0 to 4 seconds.

Hoping this helps you

https://www.cfd-online.com/Forums/fluent/95855-time-averaged-velocity-plot-transient-simulation.html

Dear Zoubair Boulahia

Thanks for your help.

- Create plane/section on your geometry.

- Export data (profiles) from that plane/section at each time.

- Use Tecplot/excel/Matlab/origin or any, to open or process the data. 

Dear Mohammad Javad,

Can you understand the attached picture ?

1) use, Custom Field Functions to add your velocity function.

2) clink On to Data Sampling for Time Statistics with your desire Sampling Interval and mention the highlighted the function. as shown in the given picture.

3) go to In the initialize window and click on " Reset Statistics"

Good Luck

Dear Omer Musa

Thanks for your reply.

Dear Muhammad Furqan Ali 

Thanks for your great response.

I did not select data sampling, and I want to plot the time-averaged velocity via Fluent of cfd-post. Running the simulations again will take lots of time so what should I do?

Hi!

Did someone solve this?

I would prefer if I don't have to run the simulations again.

Thanks

What I came to know after I posted the question on ANSYS student forum is that if data sampling was not selected, then it would require a script to extract the time-averaged velocity, which I have no idea how to do it.

Thanks for the answer Mohamed

@ Muhammad Furqan Ali, could you please explain what is the function of Sampling Interval number?

Is it the nth time-step which will be taken for averaging purpose?

For example in the simulation case from your screenshot, the Sampling Interval value is 25. Does this mean Fluent will use every 25th time-step's value for averaging?

Your explanation will be a great help brother.

..

@ Mohamed M Hussein and Sandra Milena Lopez Zamora

..I think by script they meant a code. You can export the saved data-files into excel or matlab, and then find the average/mean manually or by code.

I hope you have saved (automatically) the data files for different time-steps in regular intervals.

If not, then resume the simulation with Data Sampling activated, and run for adequate of flow-through times to get averaged-data.

Dear researcher, you can use ANSYS transient analysis module. with all respect.

If you enable the Data Sampling for Time Statistics option in the Run Calculation Task Page, ANSYS Fluent will compute the time average (mean) value

see more: https://www.sharcnet.ca/Software/Ansys/17.0/en-us/help/flu_ug/flu_ug_sec_time_post.html