Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Mass conservation vs inflow and outflow › Reply To: Mass conservation vs inflow and outflow
October 7, 2024 at 11:14 am
SRP
Ansys Employee
Hi,
For conservation of mass to hold true, there needs to be an equivalent mechanism allowing air to replace what is being extracted. Conservation of mass still applies even if there is no natural opening and an extract fan is removing 3 m³/s of air. In this situation, since mass cannot be created or destroyed, for the conservation of mass to hold, there must be an equivalent inflow or compensatory mechanism to replace the air being extracted.