Learning Forum

[elisio]

Hi,

I want to model air injection through nozzles into a furnace to evaluate the mixing condition.

I designed 2 bodies (furnace + nozzles / both set as ideal gas at different temperatures) as shown below:

[Keyur Kanade]

Is there any face between nozzles and furnace body? Is furnace and nozzle body different or a single body?
Did you do share topology in SpaceClaim or DM?
Also make sure that you have sufficient mesh density to resolve flow.
Please check following videos

Ansys Meshing Sizing:

[elisio]

Hi knnanade, thanks for sharing it.
I have 3 different bodies at furnace (bottom, middle, upper) for different mesh density since i have limited cells and my main study is at middle region. There are some patterns for nozzles as shown below:
The furnace bodies doesn't show the Share Topology Tree, only the nozzles, is it OK?
So i applied it to the nozzles and in Workbench Upper Menu i have activated Share option to share coincident topology (purple edges).
I will evaluate new results from now.

Thanks for the help :)
Regards.

[elisio]

Probably mesh problems?

[Rob]

That looks like the zones aren't connected. If you plot with node values off what do you see? Are there any contact zones in Meshing?

[elisio]

It looks like zones arent connected, but it is, since we have a "strange injection"

This is what mesh looks like:

Can this mesh difference be the problem? Furnace is much bigger than nozzles (2nd comment picture), i should increase my mesh density? (i already have 512k cels, probably should decrease 3D geometry)

Thanks.

[Keyur Kanade]

As mentioned earlier, you will need to do share topology for conformal mesh.
You have non conformal mesh. The jump is very very high. Please use similar size mesh at the interface.
Please go through help manual for more details
Regards Keyur
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