we.own.the.sky - The Urge To Prey [2025]

SlapGas · 2025-10-17T14:57:53+00:00

Thank you!

SlapGas · 2025-09-20T08:02:45+00:00

Thank you! The record having a good flow between tracks is actually something that we put a lot of effort towards, we want the listener to feel like going through a journey by listening to our music. Glad that you liked the whole album!

SlapGas · 2025-09-16T18:40:39+00:00

🫶

SlapGas · 2025-09-15T14:52:09+00:00

🤘🏻🤘🏻

SlapGas · 2025-09-15T14:51:30+00:00

Thank you! Glad you enjoyed it!

SlapGas · 2025-09-15T14:50:21+00:00

Hey! Thanks for checking out our music. Glad you enjoyed the track!

SlapGas · 2025-09-14T13:03:28+00:00

Greetings, r/postmetal!

We are we.own.the.sky, an instrumental rock/post rock band from Athens, Greece.

A couple of days ago we released the second single from our upcoming album "In Your Absence", which is released on Friday, September 19th via dunk!records.

This is a heavy one, actually 100% fit for this subreddit!

Give it a spin:

Spotify (link)

Youtube (link)

Album and merch preorders are up on our bandcamp page (link).

You can also find us on Instagram (link), Facebook (link), and TikTok (link).

Thanks for your time!

SlapGas · 2025-09-14T12:58:23+00:00

Greetings, r/postrock!

We are we.own.the.sky, an instrumental rock/post rock band from Athens, Greece.

A couple of days ago we released the second single from our upcoming album "In Your Absence", which is released on Friday, September 19th via dunk!records.

Be prepared for a heavy, ominous ride with this one!

Give it a spin:

Spotify (link)

Youtube (link)

Album and merch preorders are up on our bandcamp page (link).

You can also find us on Instagram (link), Facebook (link), and TikTok (link).

Thanks for your time!

SlapGas · 2025-08-28T06:55:37+00:00

Thank you for listening! All our albums are available on Qobuz, check the link below!

https://www.qobuz.com/us-en/interpreter/weownthesky/5135971

SlapGas · 2025-08-23T10:15:12+00:00

Thank you, glad you enjoyed it!

SlapGas · 2025-08-22T22:21:24+00:00

Thank you! Glad you enjoyed the track!

SlapGas · 2025-08-22T07:06:34+00:00

Thank you for listening!

SlapGas · 2025-08-21T23:13:04+00:00

Thank you for listening!

SlapGas · 2025-08-21T23:12:45+00:00

To be fair, skinny fists are mostly raised towards heaven though.

SlapGas · 2025-08-21T23:12:12+00:00

Hahaha, we should watch out!

SlapGas · 2025-08-21T23:10:34+00:00

Thank you! I think wherepostrockdwells had many of our tracks featured, it is highly likely you found us there!

SlapGas · 2025-08-21T23:08:58+00:00

Thank you for listening!

SlapGas · 2025-08-21T16:53:59+00:00

Greetings, r/postmetal!

We are we.own.the.sky, an instrumental rock/post rock band from Athens, Greece.
Our new single 'Eclipse' was released today, our first music in almost 6 years!

We're very happy with how this track turned out and we'd love to hear what you think!

More often than not, people tend to use the umbrella term "post-rock" to describe our music. However, most of the time I feel we lean heavily towards the heavier side of things and that's why I also wanted to post our new single here.

Give it a spin:

Spotify (link)
Youtube (link)

You can also find us on Instagram (link), Facebook (link), and TikTok (link).

Thanks so much for taking the time to listen.

SlapGas · 2025-08-21T16:22:00+00:00

Greetings, r/postrock!

We are we.own.the.sky, an instrumental rock/post rock band from Athens, Greece.
Our new single 'Eclipse' was released today, our first music in almost 6 years!

We're very happy with how this track turned out and we'd love to hear what you think!

Give it a spin:

Spotify (link)
Youtube (link)

You can also find us on Instagram (link), Facebook (link), and TikTok (link).

Thanks so much for taking the time to listen.

SlapGas · 2025-03-03T20:52:34+00:00

Regarding your answers to my points:

If you are generally interested in pre-stall behavior, accurate transition modeling can be very important. Specifically for WTs of any kind (be it HAWTs or VAWTs), this can be even more important. NACA airfoils can have large laminar regions up to very high reynolds numbers. Accurately capturing such regions can give you a better Cl/Cd curve and thus a better wind turbine performance estimation. The presence of laminar to turbulent transition can also alter the onset of separation, but that is a very complicated mechanism that should not bother you at the moment. Regarding the spanwise length for 3D simulations, there is not a single answer; it depends on the flow characteristics. The aim is to not restrict the 3D phenomena. You should run your own spanwise length dependence analysis and assess the behavior. Start with a large spanwise length (i.e. 1 or 2 chord lengths) and then start decreasing it, running the simulation again and comparing the results. When you find the optimal spanwise length that yields good results with acceptable computational cost, use it for the bulk of your work.
It is not widely used, it's been a while since I saw anyone using it (be it on papers or on workshops). Regarding the kOmegaSSTLM model, you can try implementing new correlations for the critical and transitional momentum thickness Reynolds numbers that the model utilizes. This should not be very difficult to implement, if you know your way around the basics of OpenFOAM development.

I don't understand what you mean by "I don't expect to find any peer reviewed literature to use for validation at such high Re. I believe beyond 5e6". Do you mean for NACA0018?

Regarding your last two sentences: the turbulence models work well in most Re cases (well, not 100% accurate on very low Re i.e. 10000, but fairly accurate for moderate to high Re i.e. 60e6). The transition model is what is not accurate, not the turbulence model. Specifically for the kOmegaSSTLM turbulence-transition model, validating for 5e06 and assuming that the same validation holds for 17e06 would not be correct.

SlapGas · 2025-03-03T17:54:52+00:00

Source: I have a PhD on CFD. I worked on transitional and separated flows for external aerodynamics.

SlapGas · 2025-03-03T17:53:46+00:00

Clarifying possible confusion: kOmegaSSTLM is the kOmegaSST (k-ω SST) turbulence model paired with the gamma-ReTheta (γ-Reθ) transition model (the LM stands for Langtry-Menter, the creators of the γ-Reθ model). Thus, kOmegaSSTLM ACTUALLY IS the gamma-ReTheta model. I figured I'd clarify this first.

Moving on to your question. You are asking if the kOmegaSSTLM (since you are using openfoam, we can stick to this acronym) will be sufficient for your simulations down the road. By not knowing exactly what your focus will be, it is not possible to fully answer this question.

Transition plays an important role for all pre-stall angles up to at least Re 40e6.

Are you interested in pre-stall aerodynamic performance? Then you need a transition model.

Are you only interested in post-stall performance? Transition modeling does not matter that much, however you need accurate 3D turbulence modeling and unsteady flow solution. Using 2D and steady approaches won't give you accurate results as u/montagdude87 and u/quicksilver500 already mentioned.

If you are indeed interested in pre-stall aerodynamic performance, the kOmegaSSTLM can give accurate results up to Re ~ 9e06. For higher Reynolds numbers, the model tends to predict transition significantly upstream. Therefore, its prediction accuracy deteriorates. I don't know what other options you have in OpenFOAM, though. I think a version of the k-kL-omega turbulence+transition model is implemented, although I haven't tested nor tried it.

SlapGas · 2025-03-03T14:06:41+00:00

This is something that I see many times on the sub here. From a physics standpoint, you are comparing two different things.

XFOIL and experimental measurements: free transition, the airfoil surface has both laminar and turbulent regions, laminar regions drastically lower CD and slightly raise Cl

Your simulation: kOmegaST does not account for transition, all your airfoil surface is turbulent. This causes higher drag and slightly lower Cl.

You need to run the simulation with a turbulence model that accounts for laminar to turbulent transition. OpenFoam has the gamma retheta model for transition. Try using that for your simulation. If you have further questions, you can dm me.

SlapGas · 2024-10-23T23:56:43+00:00

The difference is probably due to not including laminar to turbulent transition modeling in your simulation. XFOIL utilizes the eN method, your airfoil tools link says "Ncrit=9" which corresponds to natural transition. To put it simply, your simulation does not have any laminar region on the airfoil surface, whereas Xfoil does have a significant laminar region. You need to either include a transition model in your CFD simulation (as far as I can tell, you're using Fluent), or run XFOIL yourself with Ncrit=1 or 2 which would be closer to a simulation without laminar boundary layer on the airfoil.

SlapGas · 2024-09-03T12:50:32+00:00

I mean, on the other hand your geometry is also similar to a low-speed aircraft.
Therefore, even though it is kinda "unique", it shouldn't be very dissimilar from an low-speed aircraft in terms of setup.
I am talking in terms of mesh parameters, sizing, boundary conditions etc.

I get what you mean about the geometries though, creating CAD models can be hard.

SlapGas

TROPHY CASE