I concluded the discussion of shaft work and flow work. Based on
the performance on the first PRS question, I seems that people
have a good understanding of these concepts. I then introduced
the concept of stagnation quantities (enthalpy, pressure
temperature) using a second PRS question. I find it easiest to
understand stagnation properties and whether temperatures and
pressures go up or down with moving and stationary flow by
making arguments about changes in internal energy and kinetic
energy. We will spend all of the next lecture on these concepts.
I also recommend you read over the notes as well as the old mud
responses (T9, T10, T11) Responses to 'Muddiest Part of the
Lecture Cards' (25 respondents out of 67 students) 1)I don't
really understand how the temperature of a peice of fluid that
gets stuck to an airplane goes up because it gains k.e. by
moving (I guess I don't understand the trade-off). (1 student)
When a moving airplane moves a particle in the air somewhere
above it, where does the energy co