Ansys Fluent Energy and Pressure Drop Problem

- May 24, 2022 at 5:37 pm
  
  jagar
  Subscriber
  
  Hello everyone. I am trying to do a double tube heat exchanger analysis. According to the actual results, I need to find the pressure drop of 27 pa, the coefficient of friction 0.17, and the nusselt value of 11. but I find all three results completely different. can anyone help?
  
  inner tube diameter and thickness: 38.2 mm and 1mm
  outer tube diameter and thickness: 82 mm and 6 mm
  lenght of tubes : 1100 mm
  SIMPLE Solver, Realizable K-epsilon models i tried.
  inner tube hot fluid AİR
  ouuter tube cold fluid WATER LİQUİD
  tubes materials are STEEL
- May 24, 2022 at 7:05 pm
  
  DrAmine
  Ansys Employee
  
  Focus on Total pressure drop, first of all.
  Are you taling care sbiut boundary layer resolution?
  Are you having right mass flow/velocity at inlet?
- May 24, 2022 at 7:25 pm
  
  jagar
  Subscriber
  
  Yes, I am entering all the limits correctly. because I'm trying to do a numerical analysis of an experimented project. I have all the information about project. I think I entered all of them correctly as inputs. I am sharing an example below that I found on the internet. its going up like that or keep going down. And im sharing the datas about project.

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