Learning Forum

[Amruthapreethi]

I am simulating 2D RDE combustor using species transport. The fuel-air mixture is present everywhere in the domain. I have tried patching to put products in the domain. But it works initially at the start of solution only. So, I have tried partitioning into zones. but I am unable to place different mixtures in two different zones. How to divide into zones as shown in the figure below:

2D_combustor.png

[Rob]

How are you adding fuel & oxidiser into the domain? Staff are not permitted to open attachments so please post the image so we can see it.

[Amruthapreethi]

Thank you sir for your immediate response.
I am adding fuel-air through mass-flow inlet.

The fuel-air contour is as follows
To add regarding the error: when I am creating the two different zones in mesh and providing with different mixture materials, Console is showing error as below
Thank you!

[Rob]

OK. Check the cell zones and make sure you have the mixture on both. Fluent doesn't do this automatically and it can catch people out. That may solve the rest of the problems. How are you stabilising the flame?
As an aside, when plotting 2d contours do not select any surfaces. Fluent will (probably) auto select something, but leave it to decide. I think you're plotting on the interior which gives you a load of lines rather than a smooth surface plot.

[Amruthapreethi]

Sorry for the delayed response.
I tried few things but I could not get a solution. I have defined cell zones and mixtures as follows

But inert-mixture not showing in the cellzones dialogue box to select.

How to fix this? I am making contact_region-trg as interior. Is it correct?

[Rob]

Both cells zones should be the mixture, the fuel & oxidant volume fractions are set on the boundaries.