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Search took 0.00 seconds. Search: Posts Made By: JulioPieri
Forum: Main CFD Forum July 12, 2023, 14:23
Replies: 26
Views: 872
Posted By JulioPieri
Dear all, Thank you for your time to answer...

Dear all,

Thank you for your time to answer my questions. In fact, I have a long way to go to precisely understand the mathematics behind turbulence.

The thing firstly got me confused because I...
Forum: Main CFD Forum June 30, 2023, 10:33
Replies: 26
Views: 872
Posted By JulioPieri
LuckyTran: That's exactly the point I'm...

LuckyTran:
That's exactly the point I'm bringing here... Why do the laminar results look (visually, judging only by human interpretation) better? I dont have a clue if they are better, and the...
Forum: Main CFD Forum June 29, 2023, 16:45
Replies: 26
Views: 872
Posted By JulioPieri
I see... So I might be too optimistic when seeing...

I see... So I might be too optimistic when seeing the results from unresolved DNS. I'm mostly using limitedLinear discretization scheme.

Do you think I can extract useful results from my grid as...
Forum: Main CFD Forum June 29, 2023, 16:18
Replies: 26
Views: 872
Posted By JulioPieri
Do you think the spatially filter variables in a...

Do you think the spatially filter variables in a course mesh like mine would be "too filtered", thus leading to meaningless results?

At the outlet, the statistically steady fields show a...
Forum: Main CFD Forum June 29, 2023, 15:45
Replies: 26
Views: 872
Posted By JulioPieri
You mean that the uRANS tries to account for the...

You mean that the uRANS tries to account for the influence (through modeling) of the lower scale turbulence, whereas the Laminar skips it?
I do have some probes, but they didn't run for long time...
Forum: Main CFD Forum June 29, 2023, 15:17
Replies: 26
Views: 872
Posted By JulioPieri
I can share some info here yes, but not detailed...

I can share some info here yes, but not detailed figures. Let's save the email in case more clarifications are needed.

The problem is studying the temperature at the outlet of a flame-tube boiler....
Forum: Main CFD Forum June 29, 2023, 14:08
Replies: 26
Views: 872
Posted By JulioPieri
Thank you for willing to help me. I'd be glad to...

Thank you for willing to help me. I'd be glad to share the details with you. Let's move to e-mail/private message? pieri175@gmail.com , in case you're ok with that. I can show you the domain and...
Forum: Main CFD Forum June 29, 2023, 13:44
Replies: 26
Views: 872
Posted By JulioPieri
Interesting... I don't see how I could...

Interesting... I don't see how I could practically do that calculation for my simulations. I have to come up with something else, or just use RANS.

What about using a Re/Peclet number criterion?...
Forum: Main CFD Forum June 29, 2023, 13:27
Replies: 26
Views: 872
Posted By JulioPieri
If I had any energy pile-up, wouldn't my...

If I had any energy pile-up, wouldn't my simulation just blow-up (seen by an increasing difficulty to converge some variables)? I mean, the fact that it is able to run for some time isn't a good...
Forum: Main CFD Forum June 29, 2023, 12:48
Replies: 26
Views: 872
Posted By JulioPieri
Hi Prof. Denaro, thank you for your reply. I...

Hi Prof. Denaro, thank you for your reply.

I indeed need more research on the topic. Could you please point me some books/papers related to that (and to other CFD foundation knowledge)?

As for...
Forum: Main CFD Forum June 29, 2023, 11:17
Replies: 26
Views: 872
Posted By JulioPieri
Why "no turbulence model" looks more realistic

Hello guys!

I've being experimenting with different turbulence models to see how they affect the flow mixing.

I noticed that the "laminar" viscous/turbulence model, which doesn't apply any...
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