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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Volume Fraction too Low. How to Improve? › Reply To: Volume Fraction too Low. How to Improve?

July 31, 2024 at 11:40 am
abdullahhassan
Subscriber

"how many steps do you need to get flow from the inlet to the outlet?"
actually, I never considered this before. i just calculated these and with velocity 0.0083m/s and domain length (in to out) is 200mm so
1- 24.1s required to travel from inlet to outlet. 

2- step size should be = 24.1s  / 1e-5 * 20(iteration/timestep) = 120500 steps. 

does this mean, a flow should move from inlet to outlet in 120,000*20 = 2410000 iterations? 

 

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