Computational fluid dynamics

- December 23, 2022 at 9:08 am
  
  Anastasija Voribjova
  Subscriber
  
  Still cannot combine all the equations (he Reynolds-averaged Navier–Stokes, Direct Numerical Simulation, e Large Eddy Simulation) in one system for computational fluid dynamics simulations performance (for turbulent flow). The aim is to examine
  the flow characteristics of some impeller designs.
  Need assistance!
- December 28, 2022 at 4:48 am
  
  Nikhil N
  Subscriber
  
  Hello,
  
  I didn't understand what you meant by combine? RANS, LES and DNS are different approaches and can't be combined. RANS and LES can be picked directly in Fluent. For DNS, there is no specific option. Rather, you can select unsteady, laminar with time and spatial discretization as recommended for DNS (refer to literature). However, this will be extremely computationally expensive and is only recommended for simple geometry, provided you have sufficient computational resources.
  
  Guidelines for Performing DNS on Fluent (ansys.com)
  How can I access LES model on Fluent (ansys.com)
  
  Thanks!
  Nikhil