CVEN 3313 Chapter Notes - Chapter 4: Free Body Diagram, Unit Vector, Air Compressor
27 Feb 2017
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Document Summary
As described in the previous section we can describe fluid motion by (1) following individual particles or (2) remaining fixed in space and observing different particles. In either (cid:272)ase, apply newton"s se(cid:272)ond law to des(cid:272)ri(cid:271)e parti(cid:272)le a(cid:272)(cid:272)eleration. For the lagrangian method we describe the fluid acceleration like solid body dynamics for each particle. For the eulerian description we describe the acceleration field as a function of position and time without actually following any particular particle. Acceleration is the time rate of change of velocity for a given particle. For unsteady flows, the velocity at a given point in space may vary with time. Unsteady effects: the local derivative is a result of the unsteadiness of the flow. Streamline coordinates: an example of this is a two-dimensional flow illustrated to the right, the orientation of the unit vector along the streamline changes with distance along the streamline.
