Hi everyone,
I am working on simulation of stirred tank reactor operating at batch mode. So, there is no fluid inlet-outlet in the system. Can I calculate the local mean age of fluid by using FLUENT? If yes, how?
How you would define the "age of the fluid" in your case? For a case with inlets/outlets the "age of the fluid" is describing the mean residence time of a fluid molecule in the bounds of the geometry of interest. For a closed batch reactor I would assume, that the age of the fluid is equal for all molecules of the fluid which take part in the investigation/flow right from the beginning with no regard whether they are moving or not. Any other understanding?
Regards,
Dr. Th. Frank.
Batch reactor and Fluent? Interesting. ...... Out of curiosity, ordinary differential equations or partial ones? When it comes to "fluid age", I also associate it with space (residence) time. But it applies to flow reactor not batch one. Maybe it is also about the concentration field and average concentration in the whole volume or in the part (non-ideal mixing, noise). But that is just guessing
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