Is fluent have Danckwert boundary condition or we have to implement it via UDF?

- March 23, 2022 at 10:32 am
  
  ritwik
  Subscriber
  
  I am trying to model a reactor plug flow, where I have to implement Danckwert boundary condition which is
- March 23, 2022 at 1:00 pm
  
  DrAmine
  Ansys Employee
  
  So diffusive flux normal to a boundary is equal to that term on RHS: in new Ansys Fluent version you can provide a flux for species along the walls and there I am sure you can code a DEFINE_PROFILE for that.
- March 24, 2022 at 5:51 am
  
  ritwik
  Subscriber
  
  No, i have to put the boundary condition at the inlet.
- March 24, 2022 at 10:03 am
  
  DrAmine
  Ansys Employee
  
  So you need to use then DEFINE_PROFILE anyhow.
- March 28, 2022 at 9:38 am
  
  ritwik
  Subscriber
  
  What does inlet diffusion actually mean in species transport model as shown in this figure? Does it actually implemented the Danckwert boundary condition as mentioned in the question?
- March 28, 2022 at 12:44 pm
  
  DrAmine
  Ansys Employee
  
  It does account for diffusive transport on top of convective inflow at inlet.
- March 28, 2022 at 7:45 pm
  
  ritwik
  Subscriber
  
  Does it represent the same condition that I have asked the question> Is it mentioned anywhere in the fluent guide? Can you please tell me where I can find out. I am not able to visualise what you where saying
- March 29, 2022 at 9:00 am
  
  DrAmine
  Ansys Employee
  
  What do you not understand under "it accounts for diffusive transport on top of convective .."?
- March 29, 2022 at 10:37 am
  
  ritwik
  Subscriber
  
  Does your statement represents the same boundary condition I have mentioned or it means something else?

Viewing 8 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions