Learning Forum

[shivareddy]

I am simulation a centrifuge to see how much fluid is moved out of a column. My goal is to move 95% of the fluid out of the column and see how much time it takes to reach that. I already defined an expression in report definition (say, with name 'percentage-fluid'). I want to stop the transient simulation if the value reaches 95% or more. Is there a way for me to execute this? I believe I can write a command under "Execute Commands" in "Calculation Activities" but I can't find a resource on how I can write such a command. Thanks in Advance!

[Rob]

Much the same approach as suggested here /forum/discussion/32782/how-to-define-convergence-criteria-based-on-temperature#latest However in your case you can just monitor (plot) the report and see what the time is when the report hits a set value.

[shivareddy]

Thanks for the reply! I was plotting the variable and keeping an eye on it but the relation between the variable and time is exponentially decaying and I can't accurately calculate the approximate time at which it would reach the required value just by looking at the plot. Thought I would run for higher number of time steps and make Fluent stop when the monitor reaches a certain value. However, I believe the post you linked should work for me.

[DrAmine]

If you can incorporate your report in as Convergence Monitor you can avoid writing schemes/UDF for that.

[shivareddy]

Thanks for the reply, I now incorporated it into convergence conditions. I hope it works.