[dhehdxhdaus]

Thanks to all of you, I have made great progress in my work.

I need to get 2 values as a result. This simulation is run with a model with two inlets and two outlets.
The first value is fraction at each inlet at one outlet and the second value is isolation from the entire model. The second was solved by calculating the residence time.

With the help of the forums, I managed to get a reasonable results. However, I am not familiar with the additional value yet, so I want to verify that the settings I have made are correct.

1) recirculation

1. Set additional value 'recirculation'. Specific, Unit[], Scalar
2. Set Default Domain > Fluid Models>Additional value>recirculation(check) > Transport Equation
3. Set Inlet Domains > Boundary Details > Additional Variables> Value Inlet(A):1 Inlet(B):0
4. Set Expressions> ratio = massFlowAve(recirculation)@Inlet(A)
5. Set output control>Monitor>Monitor Points and Expressions>Option : Expression, Expression Value : Ratio
6.On the results, check Calculator As massflowAve, Outlet

2) isolation

1. Set additional value 'Isolation'. Volumetric, Unit[s], Scalar
2. Set Default Domain > Fluid Models>Additional value>Isolation(check) > Transport Equation
3. Set Sub Domains > Set location as all > Sources > Isolation > Option : Source, Source = 1
4. Set Inlet Domains > Boundary Details > Additional Variables> Value Inlet(A) : 0[s] Inlet(B) : 0[s]
5. On the results, check Contour as Isolation

I think the result of 1) is the fraction at each inlet at the outlet.
I think that the result of 2) is the residence time mapped to the set contour.

I want to know if those values are the values I want. Dear all, thank you for your help as always.

[ghorrocks]

1) Isn't the value of ratio = massFlowAve(recirculation)@Inlet(A) = 1 because you defined it to be 1 in line 3?

You probably want ratio = massFlowAve(recirculation)@OUTLET to get the mixing ratio at the outlet of the two inlets.

[dhehdxhdaus]

Originally Posted by ghorrocks

1) Isn't the value of ratio = massFlowAve(recirculation)@Inlet(A) = 1 because you defined it to be 1 in line 3?

You probably want ratio = massFlowAve(recirculation)@OUTLET to get the mixing ratio at the outlet of the two inlets.

What I gave the value to outlet(A) was written incorrectly as Inlet(A). Thanks for pointing it out.

[ghorrocks]

I cannot see any issues with what you have written. But you cannot debug a simulation from that, you need to run it and see if it behaves as expected.