how to save parameter in each time step without deleting pervious time step data

shedo · April 8, 2022, 17:35

hello experts,
I want to save and write one of my defined parameters in a file in each time step without deleting the previous steps' data because I want to compare this parameter in each step. Can anyone help me to know how to save this data by UDF?

jps115 · April 9, 2022, 07:30

Hey shedo,

You could look into DEFINE_RW_FILE, to write your defined parameter to a file and read the parameter back. This way the data is stored and you can access it.
See for more information:
https://www.afs.enea.it/project/nept...udf/node29.htm

I hope this was usefull!

shedo · April 10, 2022, 02:00

Dear Jeroen,
thanks for your response. I would like to know whether it is capable of recognizing and recalling the previous step data or not?

jps115 · April 10, 2022, 03:40

Do you want to use the value for post-processing or for it to be used for later calculations within your simulation?

For post-processing, you can write both the time step and your defined parameter to the file with the macro CURRENT_TIMESTEP. To use it within your simulation you can use another DEFINE_RW_FILE function to read back the data.

I hope this was useful

shedo · April 10, 2022, 04:23

Dear Jeroen,
I want to use it within simulation.
your explanation was useful, I do appreciate you.

April 8, 2022, 17:35	how to save parameter in each time step without deleting pervious time step data	#1
shedo New Member sheida Join Date: Mar 2021 Posts: 11 Rep Power: 5	hello experts, I want to save and write one of my defined parameters in a file in each time step without deleting the previous steps' data because I want to compare this parameter in each step. Can anyone help me to know how to save this data by UDF?

April 9, 2022, 07:30		#2
jps115 New Member Jeroen de Graaff Join Date: Feb 2022 Posts: 9 Rep Power: 4	Hey shedo, You could look into DEFINE_RW_FILE, to write your defined parameter to a file and read the parameter back. This way the data is stored and you can access it. See for more information: https://www.afs.enea.it/project/nept...udf/node29.htm I hope this was usefull! shedo likes this.

April 10, 2022, 03:40		#4
jps115 New Member Jeroen de Graaff Join Date: Feb 2022 Posts: 9 Rep Power: 4	Do you want to use the value for post-processing or for it to be used for later calculations within your simulation? For post-processing, you can write both the time step and your defined parameter to the file with the macro CURRENT_TIMESTEP. To use it within your simulation you can use another DEFINE_RW_FILE function to read back the data. I hope this was useful shedo likes this.

April 10, 2022, 04:23		#5
shedo New Member sheida Join Date: Mar 2021 Posts: 11 Rep Power: 5	Dear Jeroen, I want to use it within simulation. your explanation was useful, I do appreciate you. jps115 likes this.

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April 10, 2022, 02:00		#3
shedo New Member sheida Join Date: Mar 2021 Posts: 11 Rep Power: 5	Dear Jeroen, thanks for your response. I would like to know whether it is capable of recognizing and recalling the previous step data or not?