Mixing Station with high swirl

Trev · November 5, 2009, 11:00

Hi Ale,

Sorry for the late reply but I've been really busy recently.

For the turbulence intensity I would suggest using around 5-10%.

With regards to the target mass flow rate test it to see if the solution remains stable and if not I wouldn't use it.

Neil

AleDR · November 5, 2009, 11:29

Hi Neal!

Thanks for your reply and don't worry... in the meantime I was working on a side project for a swirl burner (...still RSM!)! And I'm trying to get OpenFOAM installed on an idle machine too. I found some interesting posts in the forum and I'd like to have a try... Do you have any experience about it?

As for the pressure outlet b.c. for the mixing station I would like to try a procedure:
1. Turn on the target mass flow rate option for few iterations, in order to have a first value for the pressure at the outlet;
2. Turn off the option and correct the pressure value with the new estimate.
I hope this could help..!
With regards to the turbulence intensity I will use the values you suggested.

Anyway I'll let you know if convergence will be improved!

Bye bye!

Ale

Trev · November 5, 2009, 12:16

I have some experience with modelling reactive flows in cyclone combustors for which the case setup is similar and I can try and help out but there are bound to be more experienced people on this forum.

AleDR · November 5, 2009, 12:49

Cyclone combustors??
But this sounds very similar to the side project I'm working on!! And I guess your experience is much more than what I deserve!

Anyway I'm still trying to complete installation correctly, because I don't have experience with Linux OS! Meanwhile, I'm learning something more about Ubuntu!

But I will share willingly anything about it as far as I get a functioning OpenFOAM on my machine..!

...let's hope!

Now I'm still meshing some alternative designs for testing them on Fluent as usual. After that I will have to select a design for prototyping ad testing at full industrial scale. And then, when I will have some experimental data, I hope to compare Fluent and (hopefully!) OpenFOAM predictions on the same mesh exported from Gambit.
I think it will be really interesting!

So thanks for your support!

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November 5, 2009, 11:00		#21
Trev Member Neil Join Date: Jun 2009 Location: The Moon Posts: 42 Rep Power: 17	Hi Ale, Sorry for the late reply but I've been really busy recently. For the turbulence intensity I would suggest using around 5-10%. With regards to the target mass flow rate test it to see if the solution remains stable and if not I wouldn't use it. Neil

November 5, 2009, 11:29		#22
AleDR Member Alessandro Join Date: May 2009 Location: Genova Posts: 47 Rep Power: 17	Hi Neal! Thanks for your reply and don't worry... in the meantime I was working on a side project for a swirl burner (...still RSM!)! And I'm trying to get OpenFOAM installed on an idle machine too. I found some interesting posts in the forum and I'd like to have a try... Do you have any experience about it? As for the pressure outlet b.c. for the mixing station I would like to try a procedure: 1. Turn on the target mass flow rate option for few iterations, in order to have a first value for the pressure at the outlet; 2. Turn off the option and correct the pressure value with the new estimate. I hope this could help..! With regards to the turbulence intensity I will use the values you suggested. Anyway I'll let you know if convergence will be improved! Bye bye! Ale

November 5, 2009, 12:16		#23
Trev Member Neil Join Date: Jun 2009 Location: The Moon Posts: 42 Rep Power: 17	I have some experience with modelling reactive flows in cyclone combustors for which the case setup is similar and I can try and help out but there are bound to be more experienced people on this forum.

November 5, 2009, 12:49		#24
AleDR Member Alessandro Join Date: May 2009 Location: Genova Posts: 47 Rep Power: 17	Cyclone combustors?? But this sounds very similar to the side project I'm working on!! And I guess your experience is much more than what I deserve! Anyway I'm still trying to complete installation correctly, because I don't have experience with Linux OS! Meanwhile, I'm learning something more about Ubuntu! But I will share willingly anything about it as far as I get a functioning OpenFOAM on my machine..! ...let's hope! Now I'm still meshing some alternative designs for testing them on Fluent as usual. After that I will have to select a design for prototyping ad testing at full industrial scale. And then, when I will have some experimental data, I hope to compare Fluent and (hopefully!) OpenFOAM predictions on the same mesh exported from Gambit. I think it will be really interesting! So thanks for your support!