The discussion clarifies the distinction between pressure and normal stress in the context of bird transport phenomena. Pressure is defined as a scalar quantity that acts perpendicularly on a surface from the outside, while normal stress is a tensor that arises internally due to the deformation caused by applied pressure. When pressure is exerted on a solid block, it results in axial deformation, leading to the development of normal stresses within the material. Understanding these differences is crucial for comprehending the mechanics involved in transport phenomena.
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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