Author Topic: What is the best way to sample the mass flow rate in a transient run in FLUENT?  (Read 1134 times)

Offline pico

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What is the best way to sample the mass flow rate in a transient run in FLUENT?

Offline william

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To get transient mass flow rate data, you need to use the surface monitor functionality under Solution->Monitors..

Let's say, you want to write out mass flow rate through the outlet face every time step.

You will click on the Monitors branch in the tree and then click the Create/Edit button under the Surface Monitors group. A window will pop up where you will select the "Mass Flow Rate" under type and select the zone you want the flow rate on.

Next, check the Write checkbox and enter a file name. Below it, you will select the write frequency. Select it to every time step or what do you think is best for you.

This completes the setting up of the monitors.

As the simulation proceeds, it will keep writing data to this file that you can open and view to make sure it is writing the correct data. Also, if you select two or more zones at the same time then the value will be the net value. If you want to store flow rates for different surfaces separately, you will create a monitor for each following the above procedure.