Flow visualization around simple building shapes in wind tunnel

No video

Flow visualization around simple building shapes in wind tunnel

Рет қаралды 50,639

Күн бұрын

This video was shot at the Budapest University of technology and Economics, in the Theodore von Kármán Wind Tunnel Laboratory. Students of the Department of Fluid Mechanics tested several simple building shapes in wind tunnel to show the flow features around them.
Please note that to achieve better visibility, the visualization was performed in a slow laminar flow, while buildings immersed in the atmospheric boundary layer experience highly turbulent flow.
(C) Budapest University of Technology and Economics (BME), Faculty of Mechanical Engineering, Department of Fluid Mechanics, 2018.

Пікірлер: 39

@eleonorasaddeassis4355 3 жыл бұрын

Many thanks for sharing this video! It is really helpful for teaching architecture students about the wind effects around buildings. I hope you can going on making more videos about wind effects around buildings and groups of buildings.

@Karmanwtl 3 жыл бұрын

Thank you. Our students made a great job when shooting and editing this video.

@Hilde_von_Derp 2 жыл бұрын

Fantastic visualization of so many urban wind phenomena, thank you!

@stardustjustlikeyou Жыл бұрын

Very cool. This is very helpful for me to visualize how to install a wind fairing on my roof rack to stop the ungodly turbulence it makes. Need to give the square building a slanted roof

@bialy100k Жыл бұрын

Very interesting, if you will do next same video add some trees / bushes / fences prior to family-type building. It's quite common in countryside area, in places where people want to build wind turbines. As well adding scaled gutters and make roof bit overhanging in relation to the walls will make flow turbulent - but closer to real environment.

@Karmanwtl Жыл бұрын

Thank you for your comments. We will test these in a future flow visualisation.

@godank 2 жыл бұрын

a lot of work and thinking is put into this video. than you very much for providing this insight.

@northstar8818 4 жыл бұрын

Physics experiment: check Nier: Automoata soundtrack: check

@Mathijs303 4 жыл бұрын

Thank you for sharing! I needed to know the slanted roof flow.

@zegion9692 4 жыл бұрын

why tho?

@larahaxe8244 Жыл бұрын

Great video, thanks!

@user-tv5ou1ky1c 4 жыл бұрын

Bom trabalho pessoal! Nice job people!

@K1NGZeusonBlitz Жыл бұрын

Thank you. I learned a lot

@josephastier7421 3 жыл бұрын

You can see these effects in nuclear test videos where buildings are subjected to blast winds.

@akashfesate 4 жыл бұрын

Really Great Video 👌

@vovaputin7922 2 жыл бұрын

Прикольно и очень наглядно . Молодцы

@hamzamutlu645 Жыл бұрын

Perfect!!

@opentutorialchannel Жыл бұрын

Music source: Keiichi Okabe - パスカル (Pascal) from the NieR:Automata Original Soundtrack. Link: kzfaq.info/get/bejne/j6dpot2rlZqylp8.html

@thebarbarian493 2 жыл бұрын

thank you for this great work but where are the mask and glass for stundents ?

@cimfur 3 жыл бұрын

Wow! The music hit my emotions really hard. It was in Nier: Automata. What a strange sensation lol. Ok, Ill try to focus on the video now.

@HamsterOnCoke 3 жыл бұрын

strange place to find that music, but yes! Nier Automata it is :)

@micogeolo8602 3 жыл бұрын

Hi, can I use your video for educational purpose only? I need it for my research on building design and its wind effect

@Karmanwtl 3 жыл бұрын

Sure, but please indicate Budapest University of Technology and Economics as the source of the video.

@micogeolo8602 3 жыл бұрын

@@Karmanwtl yes of course not a problem. Thanks 😉

@phsyc3d968 3 жыл бұрын

Pls explain separation bubble

@schlierenguy 3 жыл бұрын

Very instructive video! Have you done any work or can you point me to anywhere that looks at the extent in which the flow from the smoke machine interferes with the tunnel's flow by a) changing the density of air, and b) imparting more momentum to the flow? What was the relative (peak) flow velocities?

@TriPham-xd9wk 3 жыл бұрын

If this applied in floating island design terrain that no missile or artillery or wind can hit residential by arranging mountain high and building safe distance inside as well as high from mountain could avoid all damage from missile or artillery or wind pollution and the best air craft maybe if flying disk like frisby

@sgdran Жыл бұрын

Great work! What's the windspeed? I'm currently doing research on this and that would be very helpful

@balczom Жыл бұрын

Between approx. 4 to 6 m/s. Flow visualisations are usually done at such low wind speeds.

@sgdran Жыл бұрын

@@balczom Thanks!

@zbytpewny 3 жыл бұрын

Thankyou. +lvlup

@johnjaysonorcino5038 Жыл бұрын

Hi guys, What is the significance/importance of knowing/visualizing the wind flow to the structure/s?

@balczom Жыл бұрын

The knowledge of the basic features of wind flow around simple buildings shown in this video help us to identify the same flow features around more complex, real-life buildings and in built-up areas, where these flow features are not that easily recognizable. Wind flow is determining the wind load of buildings, so it has to be taken into account during the structural design. Wind flow around buildings also affects pedestrian-level wind conditions and the dispersion of pollutants, e.g. vehicle exhaust gases. Thus civil engineers and city planners need information on the wind flow around buildings.

@johnjaysonorcino5038 Жыл бұрын

thank you sir!

@carljung2 2 жыл бұрын

can I use this for a presentation?

@Karmanwtl Жыл бұрын

Sure, but please indicate Budapest University of Technology and Economics as the source of the video, and include the KZfaq link to this original.

@txukiki Жыл бұрын

Where can I buy the oil torche ?

@balczom Жыл бұрын

You can not buy it, because it is a custom-built system consisting of a theatrical smoke generator, an adjustable speed centrifugal fan sucking in smoke and air from the generator, and pressing it through flexible tubing to the L-shaped smoke tube, which is a solid tube of some 15 mm diameter and some 700 mm length, with a 90-deg, 120 mm long end section. The smoke tube is held by the operator, smoke exits the smoke tube and enters the wind tunnel flow at the tip of the end section. Commercial, ready-to-use alternatives are available,e.g. at Dantec Dynamics, but have a rather high price.

@marcogenovese3040 2 жыл бұрын

Be careful! These demonstrations are not so correct! if you are going to see the correct flow behavior on a scaled model you have to adjust the speed with the reverse ratio