Distinguish between shaft work and other kinds of work associated with a flowing fluid.

Short Answer

Expert verified
Shaft work involves the flow of energy due to rotating mechanical linkages such as turbines and pumps. Other works associated with a flowing fluid, like flow work and boundary work are related to pressure changes and volume changes in the system respectively.

Step by step solution

01

Defining Shaft Work

Shaft work refers to the work output or work input of a system carried out through a mechanical linkage, typically a rotating shaft. Due to the rotation, the system does work on the surrounding or vice versa. It's often observed in turbines and pumps. For example, in a turbine, the fluid pressure does work on the blades of the turbine causing them to rotate around the shaft, thus transforming the fluid's energy into mechanical work.
02

Defining other kinds of work associated with a flowing fluid

Other kinds of work associated with a flowing fluid usually refer to flow work (or pressure work) and boundary work. Flow work is the work required to push mass across the boundary of a system, and is dependent on the fluid pressure. Boundary work, on the other hand, is the work done to change the volume a system occupies, usually in piston-cylinder mechanisms.
03

Distinguishing between Shaft Work and Other Kinds of Work

While shaft work involves work being done on a mechanical linkage due to the fluid's energy, the other kinds of work, flow work and boundary work, are associated with the volume and boundary changes of the system respectively. These types of work are thus associated with different energy transfer mechanisms.

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