Over prediction of heat transfer

- March 22, 2019 at 2:30 pm
  
  mdfaizan444
  Subscriber
  
  I am currently working in force convection heat transfer through pipe with nanofluid by using mixture model two phase flow. I am getting the fluidflow result correctly (like average wall shear stress, velocity magnitude etc). BUT I AM GETTING HEAT TRANSFER VALUE (LIKE NUSELT NUMBER) OVER PREDICTED. What could be the reason for that?
- March 22, 2019 at 2:59 pm
  
  Rob
  Forum Moderator
  
  Start with the mesh resolution, then check material properties including phase assignments & droplet/bubble diameters. Are you getting too much heat transfer, or too high a fluid side heat transfer coefficient?
- March 23, 2019 at 5:44 am
  
  mdfaizan444
  Subscriber
  
  I am getting over predicted heat transfer coefficient about 20% higher than experimental value.
- September 9, 2020 at 12:26 pm
  
  AmrKaood2020
  Subscriber
  
  Do you solve the problem?n
- September 9, 2020 at 3:57 pm
  
  Rob
  Forum Moderator
  
  I suspect he didn't understand the reference values: have a look in the User's Guide for the various HTC definitions, and then review the Reference Values in the solver. n