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Fluid Flow

Lana Duncan Inglés 12 fichas

Fichas del conjunto (12)

1Define the term path line/ trajectory.The set of positions taken by a fixed particle as time increases
2Define the term Streak lineThe set of particles passing through a fixed point as time increases
3Define the term streamlineA line in space that is everywhere tangent to the velocity field at a given instant
4Define the term Time lineThe set of particles being aligned along a given direction at a given instant
(usually taken to be perpendicular to fluid flow)
5Define the term steady flowIt's pattern does not change in time
(i.e. the path line, streak lines and stream line are coincident)
6What is a region of recirculation?When the flow does not follow the surface if the object due to sudden changes in direction
7What does recirculation cause?Drag forces
Friction (changing KE to U)
8What is the mass continuity equation?Mass flowing in = Mass flowing out
9What are the conditions of the continuity equation?Must be a steady flow
10What are the requirements of the Bernoulli equation?Frictionless flow (no viscosity)
Incompressible flow (constant density)
Steady Flow
11State the Bernoulli Equation.
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