Steady –> Trainsient : Named Selections get messed up (Pics Included)

- January 31, 2021 at 10:29 am
  
  Draxler
  Subscriber
  
  Hello,
  I am doing a Heat-Exchanger simulation using Ansys Fluent.
  This is the result when I simulate: "Steady"
- February 1, 2021 at 3:45 pm
  
  Rob
  Ansys Employee
  
  What was the initial condition you set?n
- February 1, 2021 at 3:49 pm
  
  Draxler
  Subscriber
  
  What was the initial condition you set?https://forum.ansys.com/discussion/comment/105155#Comment_105155
  Do you mean the boundary conditions?nInlet: 2m/s at 300KnHeating Elements: 500KP.S I thought I made a mistake yesterday so I tried re-posting the same question just now. Please delete the duplicate post if you can. Thanksn
- February 1, 2021 at 4:06 pm
  
  Rob
  Ansys Employee
  
  No, when you initialise a model you put in certain values. In steady those will very quickly be changed to the solved flow field, in transient that takes time so I want to know what the initial temperature field looks like (ie at t=0s). n
- February 1, 2021 at 5:10 pm
  
  Draxler
  Subscriber
  
  Since I don't fully understand that, I'm guessing that might be the problem.nnWhere can I change/edit that?nThis is currently how I am initializing. (I've also tried using Compute from All-zones and still the same results)nn
- February 1, 2021 at 5:12 pm
  
  Rob
  Ansys Employee
  
  If you're using standard initialisation you'll have options to set all field variables in the panel. These need to represent the time zero situation. The transient solver will then solve the changes from that position with time. n

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