Why does the velocity in the center of the tank not converge?

- August 27, 2022 at 5:33 pm
  
  thaipham0815
  Subscriber
  
  I am told that this should converge, but not told how to fix it nor can I find a solution online.
  Here is the setup that I used in Ansys.
  Solver: Transient, Pressure Based
  Number of Time Steps: 6000
  Time Step Size: 0.1
  Max Iterations/Time Steps: 20
  Fluid material: Water-Liquid
  Method: Simple
  Initialization: Hybrid
  Mesh cell size: 0.001m
  Nodes: 280521
  Elements: 279017
  Boundary Conditions:
  Inlet velocity = 0.0115 m/s
  Wall = No Slip
  Outlet Gauge Pressure = 0 Pa
  Thanks for the help guys!
- August 29, 2022 at 1:03 pm
  
  Nikhil N
  Subscriber
  
  Hello,
  
  Can you extend the run for some more iterations? Also, can you post a snap of the residual plot here?
  
  If it didn't work out, try reducing the time step size. Any specific reason for solving it with transient consideration?
  
  Nikhil
- August 30, 2022 at 4:05 pm
  
  Rob
  Forum Moderator
  
  Is this 2d?