9mill Mesh not running (doesn’t start iterating) in Fluent 19.2 but does in CFX 19.2

- November 15, 2019 at 8:23 am
  
  CatiaV5
  Subscriber
  
  Hi everyone,
  
  I try to run a simulation on my university's PC using SST SIMPLE in Fluent 19.2. However, when I start the simulation nothing happens. I assume this is due to insufficient memory but when I start the same simulation in CFX it does run. On another machine at uni with Fluent 19.1 the simulation does run fine though. The machine has 8 cores but the rest of the specs are the same as for the other computer (32GB RAM, 3.4Ghz, 64 bit). Can someone explain to me why I can run the same mesh in CFX but not in Fluent please? Is this a version issue?
  
  Thank you very much in advance for your help.
- November 15, 2019 at 11:44 am
  
  Rob
  Ansys Employee
  
  Those settings should run within 32GB RAM for Fluent. Can you check with a smaller model? Have you rebooted the machine that's struggling?
- November 15, 2019 at 2:43 pm
  
  CatiaV5
  Subscriber
  
  Yeah, I have restarted the machine and the issue is on all the machines in the computer room. Any idea of what it could be so I can point it out to our IT team?
- November 15, 2019 at 4:11 pm
  
  Rob
  Ansys Employee
  
  All machines isn't good, can you open a small model?
- November 15, 2019 at 5:32 pm
  
  DrAmine
  Ansys Employee
  
  Ate you reading the CFX definition file into Fluent?
- November 15, 2019 at 6:55 pm
  
  CatiaV5
  Subscriber
  
  Yes, Amine. I load in the def file from CFX. You reckon this is the issue? If so why?
- November 15, 2019 at 6:55 pm
  
  CatiaV5
  Subscriber
  
  I will try to set up a 6mill mesh tomorrow and see if the issue persists
- November 16, 2019 at 6:59 am
  
  DrAmine
  Ansys Employee
  
  Make a Grid Check After Loading the Definition file. Bear im mind that you Need to Setup thewhile case from scratch even if you are importing a def file
- November 16, 2019 at 7:01 am
  
  DrAmine
  Ansys Employee
  
  Just read a case from Fluent tutorials to check the installations but I assume its us rather related to the way you setup the case
- November 16, 2019 at 11:01 am
  
  CatiaV5
  Subscriber
  
  Hi, yes I do set up the case file from scratch. And it is running fine on the other computer, hence, I'm wondering why this happens. But yeah Im trying a fluent tutorial file and see if that works

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