Update 2/3

Radiation Pressure Paper

Accepted, finally. I'll fill out the paperwork and update the ArXiv version this afternoon.

Charge Exchange

High wind

Here's the final movie. Waiting for postprocessing job to start on BlueHive.

https://www.pas.rochester.edu/~adebrech/ChargeExchange/HD209458b_charge_exchange0000.png

Low wind

https://www.pas.rochester.edu/~adebrech/ChargeExchange/HD209458b_charge_exchange_low0010.png

MHD

Here's a movie up to the current frame:

https://www.pas.rochester.edu/~adebrech/MHD/MHD_high_res0000.png

We're getting some significant slowdown due to pressure protections along the boundaries of the wind. It's actually sped up over the last couple of frames — down to 2.5 months instead of 4 months.

What I believe is happening is that a vacuum is trying to form along some of the wind-ambient boundaries. Which leads to a couple of thoughts: first, have we ever tried to build vacuum handling into AstroBEAR? I know it's possible with the exact solver, so it may be something where we could have a failsafe trigger to use the exact solver at pressure protections instead of averaging or otherwise modifying the pressure. Second, would lowering the ambient density initially help with this? I.e., if it's already closer to vacuum, would it improve runtime?

Misc

Still waiting on a bunch of MHD and AMR line transfer test runs on BlueHive.

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