The surface friction coefficient and pressure drop friction coefficient of smoot

- September 17, 2023 at 5:07 am
  
  Alex Lee
  Subscriber
  
  Hi
  I use a smooth channel with periodic boundary conditions on side walls to simulate the flow between infinite flat plates. According to theory, the pressure drop is caused by friction without any other factors, so the two should be equal. However, no matter what turbulence model is used or how the grid is increased, the pressure drop friction coefficient calculated is always only 5/6 of the surface friction coefficient. I would like to know how to solve this problem?
- September 18, 2023 at 5:12 pm
  
  SRP
  Ansys Employee
  
  Hi,
  This discrepancy arises due to the simplifications and assumptions inherent in the modeling and numerical methods used in CFD simulations.Here are some factors to consider and potential ways to address this issue:Grid resolution, Turbulence modeling, mesh quality, solver convergence, numerical scheme.