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[Mohamedramon77]

[Rob]

Please repost the question. 

[V.P]

Hi Mohammed,

Can you describe your issue? I can only see the title (Transient fluid flow).

[Rob]

OK, so you can calculate the time for the flow to cross one cell. As a starting time step aim for around 1/10 of that value. You then need enough time steps to reach the desired flow time of 20s. 

I assume the 20s is a few residence times of the pipe and that you're monitoring something to determine whether you've reached equilibrium or whatever result you want to see evolve in the data. 

[Rob]

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