The boundary layer thickness is usually defined as the distance from the wall to the point where the flow velocity reaches 99 % of the free stream value.
In the very thin boundary layer associated with free stream flows with high Reynolds numbers, a steep rise in velocity occurs perpendicular to the wall.
Boundary layer thickness = 0.37*Distance on x-axis/(Reynolds Number^(1/5))
δ = 0.37*x/(Re^(1/5))
This formula uses 3 Variables:
Variables Used
Boundary layer thickness - (Measured in Meter) - Boundary layer thickness is the distance normal to the wall to a point where the flow velocity has essentially reached the 'asymptotic' velocity.
Distance on x-axis - (Measured in Meter) - Distance on x-axis is the distance of point measured along x-axis form origin.
Reynolds Number - The Reynolds number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid velocities. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.
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Answer:Role theory
Explanation: Role theory is a belief that you are in a trance. Is when a person is acting a role of a
hypnotized person,while in a real sense, the person is not in an alternate form of consciousness.
Answer:problem may Marika be challenged by is Excoriation.
Explanation:
Excoriation — is a disorder in which someone loses the top surface of their skin(epidermis) and some part of the underneath dermis when they scratch their bodies or skin. They do this constantly and sometimes in an agressive way.
Skin picking or scratching occurs due to some underlying factors that trigger it. Common triggers are seeing irregularities in one's skin and anxiety. Excoriation may cause further complications such as infection attacking the area which has been scratched , tissues can be exposed to damaging factors and also can result to sepsis.
It depends on the time period. In the 1600s when they just settled in Jamestown, they most likely didn’t know that they were there (at least how many were there) but later, of course they started driving them off so they could build more of America. I’m actually studying this in school right now so I hope I am correct. Don’t be sure this is right though...