The Bernoulli effect (the equation seems to be written like this - Bernoulli Eq).
We can also call this phenomenon: wind in high-rise buildings
Actually, this equation comes from F=ma,
It can be used to explore particles in fluids,
Used in fluid mechanics,
it can often be expressed as ---> P + 1/2*ρVV + ρgz = constant< /p>
along a streamline.
The expression method depends on the application situation.
After the differential/integral calculation, it can be applied in a wide range.
< p>In addition to polar coordinates, it can also be applied in cylindrical coordinates.I want to do a little experiment,
Place a thin piece of paper in front of the lower lip. (near the lower lip),
Blow the air directly forward with your mouth.
The paper will float.
Due to the air speed above and below de the paper is different (top>bottom),
the paper will float up,
Naturally, the strip of paper will float up,
At present, the z value in the vertical direction is very small and can be ignored,
Probably like this,
This is the best model of the equation Bernoulli for the constant flow of ideal fluids.
This is essentially another form of the law of conservation of mechanical energy.
There is an alley in our community where it is windy all year round. It was very cool and windy. I would like to ask if this is a building style and how is the building style formed?
When talking about Dubai, people think of one word, rich, rich, always rich. Dubai is said to be full of gold. This must be wrong, but they are indeed rich. money to build a world-famous city in a desert, and also created many builtcrazy lies. Why do you say it's crazy? Because these buildings are truly breathtaking? This is definitely unprecedented, and Dubai has attracted the world's attention time and again with various new and unique designs. It seems to have become a testing ground for luxury design. So there is also a saying in Dubai: Dubai is a designer's paradise as long as you have good ideas and creativity it can become a reality. Let's take a look at the ten craziest buildings in Dubai.
Top 10 crazy buildings in Dubai 1. A candlelight building in the wind
A candlelight building in the wind in Dubai is extends from the 54th to the 97th floor Together they form a dancing sculpture that resembles a flickering candle. In terms of architectural expression, its sophisticated aesthetic and innovations in structural engineering are unmatched by any modern architecture. The Candlelight Building in the Wind in Dubai is a representative of the crazy architectural art of Dubai. The individual buildings come together to form a dancing sculpture, like the flickering candlelight.
2. Palm Island
Dubai's Palm Island project was started in 2001 and the entire project will be completed in 10 to 15 years. During the construction period, the world's leading construction companies joined in the construction activities of the project. The Dubai Palm Island project includes more than 300 small islands that will be equipped with hotels and various leisure and tourism facilities. The scale of the entire project can be described as the eighth wonder of the modern world.
The Palm Islands are two large artificial islands located in Dubai, namely Jumeirah and Jebel Ali. They were built by the Dutch company Nakheel. Each island is shaped like a palm tree and surrounded by a crescent. Resident areasential and resort areas are located on the islands. This plan is explained by the fact that the continental shelf off Dubai is vast and the water depth of the Persian Gulf is quite shallow, making it possible to carry out such a large-scale rehabilitation project.
3. Burj Khalifa
The Burj Khalifa is 828 meters tall, with over 160 floors available and a total height of 206 floors. the tallest building in the world. In addition to defying the height limit, the Burj Khalifa uses the world's fastest elevator with a speed of 17.5 meters/second. Even the elevator temporarily used for construction is incredibly fast. It only takes about 70 seconds to go from the ground floor to the landscape level of the 124th floor. The building houses a large shopping center with around 1,200 stores and at least 150 restaurants, as well as gyms, clubs, seven-star hotels,s offices, etc. designed by the great Italian designer Giorgio Armani, which are fully functional. It is a city built vertically.
Burj Khalifa, also translated as Burj Khalifa, is a skyscraper located in Dubai, United Arab Emirates. It is currently the tallest man-made building and structure in the world, with a height of 828 meters and a total of 828 meters. 169 floors. The construction cost amounted to 1.5 billion US dollars.
4. Anara Building
Although this building called Anara is shorter than the Burj Khalifa, its unique appearance is much better. (The one above is not a wind turbine, but a restaurant)
5. Station
The quest for novelty and luxury of the inhabitants of Dubai is not limited to high-end hotels. High-rise buildings Such a monster also reflects unique design in some details. Dubai bus stationst very luxurious and equipped with air conditioning to make waiting easier for bus passengers. The station is made of alloy and glass. Although it is small in size, it looks very modern. Inside the station are clearly marked maps and an air conditioning system. Besides train stations, some beaches in Dubai are also air-conditioned to prevent the rich from burning their feet after swimming.
6. Diamond Ring Hotel
Just like its name, the Diamond Ring Hotel is like a diamond set between heaven and earth.Ring, and the rays of the sun complement each other. We can say that this concept is crazy. Each branch is a piece. If you have the opportunity to live there, remember to carry a parachute at all times.
7. World Island
?World Island? The original design plan was to build seven continents, but the people of Dubai realized there would be no continent. people on such a large island It is affordable, which is why the plan of the Seven Continents was modified into an artificial archipelago consisting of 300 artificial islands according to the shape of the world's continents. The World Islands are located off the coast of Dubai, United Arab Emirates. The area of each island varies from 23,000 square meters to 83,600 square meters. Adjacent islands must be separated by at least 50 meters of sea. The original intention of building this geographical marvel was to form a miniature version of Earth using 300 artificial islands whose shapes mimic the world's continents . “World Island” is the largest artificial island in the world. These islands will be equipped with hotels and various leisure and tourist facilities. The scale of the entire project can be described as the modern “eighth wonder of the world”.
8. Rotating Tower
Spin a skyscraper and dance in thes tunes sound like science fiction. But Dubai is building such a building. It will be the world's first wind-powered rotating skyscraper. It is expected to be completed in 2010. By then, the world will be able to appreciate the dancing posture of this building (the method of construction of this building). the building is also very different (each layer will be prefabricated in Italy and shipped to Dubai for assembly).
9. Dubai Walk
This futuristic building is an important part of the “Dubai Walk” plan. To facilitate the construction of the wheel-shaped building, developer Nakheel will construct an artificial island off the coast of Dubai.
10. Burj Al Arab
It is a symbol of Arab luxury and a symbol of Dubai. Entering the tallest hotel in the world is like entering Aladdin's cave. The evidence of luxury is indescribable, from the little submarine that takes you to the restaurant ofseafood, to the 17 telephones in each room, to the use of some of the eight Rolls-. Royces used as airport buses can be seen.
Because the underlying rough surface of the city is like a mountainous area with complex terrain, the streets and between two buildings are like air vents in the mountainous area, with dense aerodynamic lines and increased wind speed. , which can create a strong wind when there is no strong wind. In addition, according to wind tunnel experiments, strong wind areas may also appear around a high-rise building, that is, the eddy flow area in front of the high-rise building and the area corner drainage around both sides of the building. The wind speed at these locations is approximately 30% greater than the wind speed on flat terrain. Indeed, wind speed increases rapidly with altitude. When high windsaltitude are stuck on the top of high-rise buildings and forced to turn sharply downward, the momentum of high-altitude winds is also carried away.Go down. If there is an air duct at the bottom of a high-rise building (once connected to the building), the wind speed near the air duct inlet can be about 2 times the speed wind on flat ground. In other words, when the ambient wind speed is 6 meters/second, the wind speed near the wind duct can reach 18 meters/second, which corresponds to level 8 wind. Example panels Displays on roofs toppled by high winds in cities and causing injuries have already been cited. Many of these were caused by strong local winds caused by buildings. There have been many cases overseas where high-rise buildings were toppled by wind and injured people, and people carriedfiled a complaint with the courts and received huge compensation. It can also produce its own special wind power system.