{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

f12_mud_0304 - Lecture F12 Mud Energy Conservation 1 Whats...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture F12 Mud: Energy Conservation ˙ E 1. What’s the difference between dE/dt and E ˙ flow ? (1 student) dE/dt is the rate of change of energy contained by the mass already in the volume. flow is haw fast energy is being brought into or out of the volume by inflowing and outflowing mass. ˙ 2. What’s the difference between Q ˙ viscous and W viscous ? (1 student) Imagine a viscous friction force F f rubbing on the surface of the CV, much like a boundary layer “rubs” on the surface of an airfoil. This force does work if there is ˙ fluid velocity at the point of application, W viscous = F f · V . But if there’s a friction force, there must also be frictional heating present (a boundary layer is always slightly warmer than the effectively-inviscid fluid next to it). This excess heat will flow into the CV, and constitute Q ˙ viscous . 3. How do the physical definitions of h and h o and h o differ? (1 student) The static enthalpy h measures only the energy of the molecules as
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern