Learning Forum

[Biborka Boga]

Hi!

I would like to connect multiple segments/portions. More precisly I would like to consider the results at the outlet of one segment as an input for the next segment. The idea would be that I do not want to consider periodic boundary conditions.

Previously I have performed simulations where I have exported the outlet BC (profile) and I have imported as input BC, however at this time, I would like to automatize this procedure, since I would like to connect multiple segments.

My idea for two systems was the following:

However, unfortunately the outlet profiles from A are not transferred as the inlet  BC for B. More precisly the inlet BC from system A and B are the same. Can you please offer me some hints how the outlet profile (concentration, velocity, etc.) can be transferred to the next system (B) as input? This transferring procedure should happen continuously. Thank you very much in advance!

[Rob]

Can the result of the second part alter the first? 

[Biborka Boga]

First of all, thanks for your question. I would like to avoid such cases (the result of the second part defintitely should not alter the first one), since I am interested also in concentration profiles. Basically I would like to have a conenctivity between the segments and a uni-directional transfer of the profiles from the outlet of the precendent segment to the inlet of the following segment. I hope that I have answered your question. Thanks in advance your response.

[Rob]

OK, if you're running the models in sequence it's probably safer to use journals outside of Workbench. However, as you're also defeating the cell count cap on Fluent Student and it's not standard I can't expand on my comments. 

[Biborka Boga]

 

Thank you for your hints. The reason why at this moment I would like to connect two segments, and use the outlet  profile as an inlet BC for the next segment is because I am curious whether we obtain the same results at a constant length of the channel after assigning the outlet profiles as inlet BC.

Can you please provide me information how can I use journals for this purpose? I have alrady worked with journal files for running  simulation (when I have accessed to the cluster), but to be honest at this moment I do not really know how should I use them (for this purpose). Thank you very much in advance.

 

 

[Rob]

You'd need to write journals to read & write case & data files and write then read & apply profiles. If you click into the TUI panel & hit the Enter key you'll see the menus, type in the command & Enter to get to the next level down. Enter will refresh the menu list, and q (Q) takes up up a level. Putting terms into search (top right of Fluent) will also show some of the TUI command paths. 

[Biborka Boga]

Thank you very much! :)