Issue41

[katyhuff]

This PR handles most of the concerns in issue #41. It additionally adds explanations to the revise/revise.tex document, which we can send as part of the author response to the revisions (along with a cover letter). The following questions by the reviewer were addressed.

• Are all equations solved on the same mesh? In this case, is this a strict requirement? Please clarify.
• The MSRE had Reynolds numbers very close to the laminar-turbulent transition. Did you use a laminar model? In case, did you encounter convergence problems ? Or did you include turbulence? More generally, is Moltres capable of turbulent simulations?
• The authors are required to use the international system of units (meters, Kelvin, etc).
• The authors should briefly describe what "MSRE design models" are. Otherwise it is very difficult for the readers to assess the accuracy of the model.
• The authors claim an unprecedented accuracy of their model? How the results of their model compare with previous results from other authors? The presented results do not seem sufficient to support such claim.

However, the following four remain, before 41 can be closed:

• The heat generation in the graphite is calculated as a fraction of that in the fuel. How exactly is this achieved considering that the two sources are spatially separated?
• It is not clear how the domain is discretized. Is there a radial discretization in graphite and channels? Was the mesh convergence checked? Please discuss.
• Is the heat generation in the hottest channel the same for the Moltres and the MSRE model?
• The differences between the MSRE and the Moltres model are significant and should be discussed in more details. In particular the difference between fast fluxes is suspicious.

I am not certain of the best way to respond to the answers above (which should be briefly answerable by @lindsayad).

[gridley]

I made a PR on your branch to address the first unresolved point @katyhuff, just in case you don't notice.

[katyhuff]

Thanks folks. Merging.