Why can a sharkskin swimsuit increase buoyancy?

In the Sydney Olympics swimming competition, Australian player Ian Thorpe wore a black one-piece skinny swimsuit, like a shark traveling in clear water, breaking waves and winning three gold medals in one fell swoop, and the sharkskin swimwear he wore has since become famous. The sharkskin swimwear is a nickname based on its appearance characteristics. It has a brighter name: fast leather. Its core technology is to imitate the skin of sharks. Biologists found that the rough V-shaped folds of the sharkskin can significantly reduce the friction of the water flow, allowing the water flow around the body to flow more efficiently, and the sharks can swim quickly. The appearance of shark skin completely imitates the presence of the fast-skinned super-expansion fiber. Also, this bathing suit is full of bionics principles: resembling human tendons at the seams to power athletes when paddling backward, resembling human skin on the fabric, giving elasticity. Tests have shown that fast-skinned fibers can reduce the resistance of water by 3%, which has a special meaning in a swimming competition that can determine winning or to lose in 1% of a second. The root cause: "Sharkskin" uses buoyant polyurethane fiber material.

In October 1999, the World Swimming Federation officially promised athletes to wear fast leather to participate. And people have been exploring for many years what swimwear to swim faster. The resistance most swimmers encounter underwater is proportional to density water, frontal area , friction, and speed. Therefore, reducing the frontal area and the ratio friction is the key to planning a low-resistance swimsuit: sharkskin swimwear, a high-tech swimwear made by Speedo based on shark skin. Sharkskin swimwear is a nickname based on its physical characteristics. It has a brighter name: fast leather. Its core technology is to imitate the skin of sharks. Biologists found that the rough V-shaped folds of the sharkskin can significantly reduce the friction of the water flow, allowing the water flow around the body to flow more efficiently, and the sharks can swim quickly. The presence of shark skin completely imitates the appearance of the fast-skinned super-expansion fiber. Also, this bathing suit is full of bionics principles: imitating human tendons at the seams to power athletes when paddling backward. resembling human skin on the fabric, giving elasticity. Tests have shown that fast-skinned fibers can reduce the resistance of water by 3%, which has a special meaning in a swimming competition that can determine winning or to lose in 1% of a second. The root cause: "Sharkskin" uses buoyant polyurethane fiber material. In October 1999, the World Swimming Federation officially promised athletes to wear fast leather to participate.