Fluids

Fluids

Eddy Dissipation Concept (EDC) for combustion

    • cehangir
      Subscriber

      Hi 


      I am working on coal combustion. I have already simulated a model based on Eddy dissipation/Finite rate (ED/FR) for coal combustion. 


       


      Now, I want to compare the eddy dissipation concept (EDC) using detailed chemistry. Can someone provide me any guideline how to start off with EDC, I am not able to find any tutorials on EDC. 

    • klu
      Ansys Employee

      Hi 


      Please take a look at a demo video below.


    • cehangir
      Subscriber

      Thanks for the demo.


      However, I am trying to find a tutorial/demo/example for the EDC (eddy dissipation concept) that can provide me how to include the detailed chemistry. 

    • DrAmine
      Ansys Employee

      There is no standard official EDC tutorial which can be shared. On the ANSYS Learning Hub there are some actual dedicated workshops. Here we need a training subscription.

    • cehangir
      Subscriber

      Can you provide me some steps how I can initialize EDC.


       


      From what I have gathered from different sources, I have understood the following:


      1. in order to have a good initial guess, I should run the simulation using ED/FR till it converges. 


      2. Change the TCI from ED/FR to EDC.


      3. Import the chemkin mechanism. 


      4. Set ISAT parameters 


       


      I will really appreacite if I can get any advice on it. 


       


       


       


       

    • Rob
      Ansys Employee

      It's not an area that I'm too familiar with, but please try the steps you've mentioned and let the community know how you get on. 

    • cehangir
      Subscriber

      thanks for the input. I will try that and will update on the thread. 


      In the meantime, I will really appreciate if there is any suggestions from student community. 

    • DrAmine
      Ansys Employee

      Yes the solution strategy is fine. Just you might elaborate a bit on URFS and be patient.

    • cehangir
      Subscriber

      Thank you for the motivation. 


      Since I am using coal as a fuel, EDM considers volatile to be a Global reaction (CxHyOz). When I set the model for EDC, how do I divide the volatiles released to its constituent products (CH4, CmHn, H2). 


       


       


       

    • DrAmine
      Ansys Employee
      Start from more sophisticated Model with TCI allowing for intIntermediate species
    • DrAmine
      Ansys Employee

      Is your problem solved? If yes please mark this topic as solved. If not please create a new topic with fresh input. 

    • seeta gunti
      Ansys Employee

      Solution strategy is given in our theory guide. section 14.1.8.6


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