Learning Forum

[diop.mohamed2]

Hi.
I would like to simulate methane combustion in a ramp burner but I've some difficulties to correctly define the combustion domain.
It would be a pleasure to receive your suggestions.
The error message indicates that the outlet is adjacent to a solid domain.
Kind regards

[Rob]

Assuming you're using Fluent, check the cell zone assignments relative to the flow boundaries. You're not allowed to have flow boundaries adjacent to the solid zones. Note, in Fluent we have fluid & solid zones: in CAD they're all solid..... 

[diop.mohamed2]

Thanks Dear @Rob for your reply. I'm using Fluent.

The system I'm studying consists of two parts: the ramp burner itself and the combustion chamber.

The ramp is made up of air and fuel inlets and mixture injection orifices (nozzles) all along the surface of the tube.

The difficulty I'm having is defining the combustion chamber so that combustion takes place within it and not in the burner (between the inlets and the nozzles).

I used the enclosure option but it didn't work. With the extrusion method, I end up with the above error .

[Rob]

If the air-fuel mixture wants to burn in the wrong place that tends to mean there's a problem with the model. 

The above suggests you're not modelling the domain well. Have a very careful look at the geometry and work from there. Enclosure was designed for aircraft etc, for burners I'd always build the geometry for the injectors & flame zone in the "normal" way. 

[diop.mohamed2]

Okay. Thank you very much.

[diop.mohamed2]

could I have an illustration or tutorials in this area please?

[Rob]

It'll be covered in the geometry training, check in Learning and also the tutorials in the Help system  https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/main_page.html?hl=f

 

[diop.mohamed2]

All right.
Thanks