Hello,

 

I have here a Navier-Stokes equation:

 

 

It represents the conservation of energy in fluids. This is going into a book I'm writing and my editor says I need to cite my source for this formula. Truth is, I got it from a website that no longer seems to be online.

 

Does anyone know of a source (book, website, journal article) that I can cite confirming this.

Look through the lectures in the Surface Tension module at MIT's OpenCourseWare. It's probably covered there.

The lecture notes of the professor who taught my fluid dynamics class:

 

http://farside.ph.utexas.edu/teaching/336L/Fluidhtml/node17.html

 

It's written in a different form, but you can check the previous chapters to see how it was derived.

http://soliton.ae.gatech.edu/labs/windtunl/classes/hispd/hispd06/ns_eqns.html

 

They list the same equation under "Summary."