Test for Hybrid model must be extended for a range of Re numbers

[Niceno]

Hi guys,

At present we have two tests for Hybrid model, one on uniform, one for stretched grid. However, it would be very advantageous and convincing if we had many Reynolds numbers. Connected to that, I have some concerns:

1. If we are going to provide cases for a number of Re numbers, what shall we put as data to compare with? I assume some DNS databases, right?
2. If we are going for DNS databases, which would they be? At the time when I was a PhD student there was a database for Re_Tau=180, Re_Tau=590 came a bit later, and after my graduation I also saw Re_Tau=1080. Anything newer and bigger on the market?

Cheers

[palkinev]

Last time I searched for DNS Channel database it was Re_tau = 2300+.

[mhadziabdic]

In my thesis I have results for Re_tau = 20 000 so I am not sure that we will gain much with different Re number for channel. It is much more exciting to show that the model is working very well in wall function mode. What we would need is hybrid model in some other configuration such as impinging jet or backstep. Assoc. Prof. Muhamed Hadziabdic Mech. Engineering Program Coordinator Faculty of Engineering and Natural Sciences International University of Sarajevo Hrasnicka cesta 15, 71210, Ilidza, Sarajevo mob. +387 61 228 489 mail: mhadziabdic@ius.edu.ba

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On Fri, Nov 16, 2018 at 1:59 PM palkinev ***@***.***> wrote: Last time I searched for DNS Channel database it was Re_tau = 2300+. — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub <#85 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AeMU-uBzQsKCgObuG7YCrdeKbnWICKK4ks5uvrbKgaJpZM4YmKhR> .

[Niceno]

I would run different Re numbers (three at least) to convince some people at PSI to use T-Flows. So ... maybe I will say something stupid, but I reckon it would be nice if we had:

• Re_Tau = 590
• Re_Tau = 1080 (I think there was such a database)
• Re_Tau = 2300 (the one Egor suggests)

Egor, what is the database you are referring to? Is there a reference?

[mhadziabdic]

That is perfectly reasonable and it can be done in one-two days. I can try to do it over the weekend. Regards, Muhamed. Assoc. Prof. Muhamed Hadziabdic Mech. Engineering Program Coordinator Faculty of Engineering and Natural Sciences International University of Sarajevo Hrasnicka cesta 15, 71210, Ilidza, Sarajevo mob. +387 61 228 489 mail: mhadziabdic@ius.edu.ba

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On Fri, Nov 16, 2018 at 3:47 PM Bojan Niceno ***@***.***> wrote: I would run different Re numbers (three at least) to convince some people at PSI to use T-Flows. So ... maybe I will say something stupid, but I reckon it would be nice if we had: - Re_Tau = 590 - Re_Tau = 1080 (I think there was such a database) - Re_Tau = 2300 (the one Egor suggests) Egor, what is the database you are referring to? Is there a reference? — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub <#85 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AeMU-jC_I9KO3Ffe-wXQSHNMLlzTmainks5uvs_3gaJpZM4YmKhR> .

[Niceno]

I was peeking around a little bit to find a DNS database we could use. I encountered a few, but this one from Politechnical University of Madrid seems to be the most comprehensive for our needs:
https://torroja.dmt.upm.es/channels/data/

Do you guys know anything about it? Is this database cited, acknowledged, praised? They did publish in good journals, I see Physics of Fluids, Journal of Fluid Mechanics.

[mhadziabdic]

Jimenez is well known name in LES community and Physics of Fluid is a good journal. So I think this is reliable source. Cheers. Hamo Assoc. Prof. Muhamed Hadziabdic Mech. Engineering Program Coordinator Faculty of Engineering and Natural Sciences International University of Sarajevo Hrasnicka cesta 15, 71210, Ilidza, Sarajevo mob. +387 61 228 489 mail: mhadziabdic@ius.edu.ba

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On Sat, Nov 17, 2018 at 7:10 AM Bojan Niceno ***@***.***> wrote: I was peeking around a little bit to find a DNS database we could use. I encountered a few, but this one Politechnical University of Madrid seems to be the most comprehensive for our needs: https://torroja.dmt.upm.es/channels/data/ Do you guys know anything about it? Is this database cited, acknowledged, praised? — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub <#85 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AeMU-pKCd1Q84ZbkuBPu_eaAvGhP5l5zks5uv6hagaJpZM4YmKhR> .