What animals taught me about fluid mechanics
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Fluid mechanics is widely used in various fields. For example, the knowledge and methods of fluid mechanics can be used to design more energy-saving and safer cars and airplanes; fluid phenomena in nature such as marine environments and meteorological changes can be studied to explore their laws and effects. factors; it can also study fluid dynamics issues in energy conversion and transmission, providing theoretical and practical support for the development and utilization of energy.
Computational Fluid Dynamics (CFD)
is a technology that studies fluid motion based on numerical calculation methods. It uses mathematical models, computer simulations and numerical methods to numerically simulate and predict complex fluid motion processes to solve the distribution of physical quantities (such as flow velocity, pressure, temperature, etc.) in the flow field, and then obtain the motion laws and properties of the fluid. Finally, Carry out product structure optimization to improve performance indicators.
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In fact, fluid mechanics is everywhere. You may not realize that our actions or behaviors also involve fluid mechanics. Whether it's waving your hands, flipping the barrel of a pen with your fingers, or paddling across choppy water—these activities involve pushing fluids or creating eddies.
How do animals use fluid dynamics in their daily activities?
Animals or microorganisms may understand fluid mechanics better than you do.
For example, flamingos live in groups in salty lands and harsh environments. They are adept at using fluid mechanics, which is evident during feeding. Flamingos use their beaks to draw circles on the water, creating eddies that help them sift out small fish or other creatures hiding in the mud from dirty water.
Although the cute penguins are covered with feathers and have a pair of wings, although they cannot fly, they can use these wings (fins) to swim in the water. Using the "hydrodynamics" of their wings or fins, they are able to become strong swimmers and migrate over long distances. With the help of research on "penguin fin hydrodynamics", we have a clearer understanding of the key propulsion and resistance in swimming.
In nature, the shape, structure and behavior of living organisms are formed through long-term evolution, and they have good adaptability and superior performance in various environments. These design inspirations in nature have inspired scientists to apply the "stunt skills" of animals to the technical field, which is the category of bionics.
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Paleontologists have long used fossil remains to study the physiological characteristics and evolution of different species. Darwin spent 5 years traveling in South America and the Pacific Islands, and summarized the theory of biological evolution by studying animals, plants, relic skeletons or impression fossils.
CFD and bionics are two seemingly unrelated fields, but they are closely related. CFD ( Computational Fluid Dynamics ) is a technology that uses numerical calculation methods to study fluid movement, while bionics is a discipline that studies the structure, function and behavior of living organisms in nature, and draws inspiration from them to develop new technologies and materials. .
In nature, the shapes and structures of living organisms are formed through long-term evolution. Their structures and shapes have good adaptability and superior performance in various environments. These design inspirations in nature have inspired scientists to apply the idea of bionics to the technical field.
In the field of CFD, the application of bionics is mainly reflected in fluid dynamics. The movement and environmental adaptability of living organisms give their shapes and surface structures special hydrodynamic properties, such as reducing drag, increasing lift, reducing turbulence, etc. Applying these characteristics to engineering design can effectively reduce energy consumption, improve efficiency, reduce noise, etc.
For example, the surface of whale skin has many small bumps, which can reduce the friction of water flow and thus reduce drag. This design inspiration is applied to the surfaces of aircraft and ships, which can effectively reduce drag and reduce fuel consumption. In addition, there are many tiny feathers on the surface of swallows' wings, which can reduce the generation of turbulence and make swallows more stable when flying. This design inspiration is applied to the airfoil design of the aircraft, which can reduce the turbulence generated by the aircraft during flight, thus improving the stability and efficiency of the aircraft.
In addition to biomimetic applications of surface structures, the morphology and motion of living organisms can also provide inspiration for engineering design. For example, the forepaws of polar bears and the wings of penguins both have good propulsion and stability when swimming underwater. These motion characteristics are used in the design of underwater robots and submarines.
The combination of CFD and bionics provides great inspiration and guidance for engineering design, allowing the designed products to have better performance and adaptability. In the future, with the continuous development of science and technology, this combination will be applied in more fields and bring more breakthroughs.
Cadence is committed to driving system innovation through its long-standing core competency in computing software. Our computational fluid dynamics solutions are an important part of delivering on this promise. With industry-leading meshing methods, as well as powerful solvers and post-processing capabilities, users will quickly discover that computational fluid dynamics is "Cadence Fluid Dynamics."
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