👉 A compliant fluid, also known as a viscoelastic fluid, is a material that exhibits both viscous and elastic properties when deformed. Unlike simple liquids, which flow smoothly without resistance, or solid-like materials that resist deformation, compliant fluids can deform under stress and then return to their original shape when the stress is removed. This unique behavior arises from the fluid's molecular structure, which can stretch and rearrange itself in response to applied forces. Common examples include biological fluids like blood and synovial fluid, as well as synthetic materials designed to mimic these properties for applications in medical devices, soft robotics, and advanced coatings. The key characteristic is the fluid's ability to store and release energy during deformation, making it highly adaptable and responsive in various environments.
