[TypicalEngineer]

In the geometry window where you are getting ready to interpolate lines there are two radio buttons mid window. Top is selected by default. You want the second one where it vaugely suggests to interpolate lines along or centered on the streamline. This option is needed for geo referenced models. See if that helps.

[TypicalEngineer]

Hey Miguel,

The very short answer to your question is yes and you will find a handy relationship in the RAS 2D Manual on page 4-5. You might want to read a little about the CFL condition if you are not already familiar.

I think RAS defaults will keep you in the clear but this is something you should intentionally specify and experiment with.

Since the diffusion wave equations uses an implicit solution (not inherently bound by previous time step) scheme you can use those equations on 4-5 to keep your C between the suggested 1-5 for a delataX and deltaT combination.

At least that is how i understand it. Hope that helps!

[TypicalEngineer]

Thanks for the heads up about the FMA group. I haven’t heard about that or the effort. Please share any links if you have them. It would be great to skip all the boring stuff and go straight to interesting with the FMA results available.

Question: When you say different machine configurations were these VMs also in the cloud? For this to be really useful a lot of different configurations would need to be tested. What exactly was the goal? Was it a typical cloud architecture or was there hyper-convergence or any GPU computing?

Thanks for pointing out the links! Looks like copy and paste doesn’t take well on this forum.

Folder to Drop Models: https://drive.google.com/open?id=19VZqVt_GIqYKDAtZOGx-wReMevCsJqzN

Google Doc: https://drive.google.com/open?id=1Y12pM89ZaR_hfVUXNpp7GMYYcSY8jRmJcYk56_ivSOY

[TypicalEngineer]

Doesn’t look like anyone has giving you an answer yet so I will throw in my two cents and hopefully point you in the right direction as this is something I have not tried yet.

I think you are on the right track though looking at the HDF files. That is a lot of output to store in a plain text file. By default, I don’t think RAS prints this data to HDF however. Those file are also pretty well organized and labeled so if you don’t see what you are looking for then that computational output might need to be enabled. If you head to RAS’s run unsteady flow and find “Set Output Control Options” and go to “HDF5 Write Parameters” there is a box for writing Vel data to HDF for 2D meshes. Not exactly courant but you also have all the data there to quickly calculate it using matlab or python/pandas.

The tab before it, “Computation Level Output Options”, there are a couple boxes you can check for Courant numbers but that might be for 1D and it would write to an ascii file. Depending on how big you 2D model is that could significantly increase compute times…. if it also applies to 2D.

Anyway, hope that helps. Let me know if any of that works for because now I am curious! Thanks!

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