Well you can get real technical about it and state that pressure is a scalar quantity and stress is a tensor. But in essence, pressure when , say , it is exerted (applied) on the end of a solid block, acts perpendicular to the surface on the outside . In turn, the applied pressure deforms the block axially , giving rise to normal perpendicular stresses within the block. There are other differences as well, if you want to get deep into the subject.Est120 said:What's really the difference between pressure and normal stress? Also I know pressure acts normal to a surface from the outside
Do normal stress acts from inside?
I'm reading bird transport phenomena and this is confusing
Pressure is the force per unit area that a fluid exerts on its surroundings, while normal stress is the force per unit area that a solid object experiences due to an external force. In other words, pressure is a measure of how much a fluid pushes against a surface, while normal stress is a measure of how much a solid object resists deformation.
Pressure and normal stress play a crucial role in bird transport phenomena, as they are responsible for generating the forces necessary for birds to fly. The pressure difference between the upper and lower surfaces of a bird's wings creates lift, while the normal stress on the wings helps to maintain their shape and prevent them from collapsing under the pressure of air resistance.
The pressure and normal stress experienced by birds during flight can be influenced by a variety of factors, including air density, airspeed, wing shape and size, and the angle of attack of the wings. These factors can affect the distribution of pressure and normal stress over the bird's wings, which in turn can impact its flight performance.
Scientists use a combination of experimental and computational methods to study pressure and normal stress in bird transport phenomena. These methods may include wind tunnel experiments, mathematical modeling, and computer simulations, which allow researchers to analyze the complex fluid dynamics involved in bird flight and understand how pressure and normal stress contribute to it.
Yes, the study of pressure and normal stress in bird transport phenomena can have practical applications in fields such as aerospace engineering and biomimicry. By understanding the principles behind bird flight, scientists can design more efficient and aerodynamic aircraft, as well as develop new technologies inspired by the unique flight capabilities of birds.