Update 8/5

Radiation Pressure Paper

Believe almost every comment has been addressed. Two things remaining:

  • Neutral speed plot: better version below?

http://www.pas.rochester.edu/~adebrech/HD209458b/neutrals_speed_test.png

  • Timescale for bulging of wind. It may actually be a box effect (cycle is very close to 2 crossing times), though I'm not yet sure physically how reaching the edge of the box might increase the effect of radiation pressure.

Charge Exchange

See ​my previous blog post for the latest thoughts on charge exchange. It's recently started again on Stampede and is moving fairly quickly (~6 days left as of this morning). Here are the latest frames:

http://www.pas.rochester.edu/~adebrech/ChargeExchange/HD209458b_charge_exchange_rxt0008.png

Species proportions

http://www.pas.rochester.edu/~adebrech/ChargeExchange/HD209458b_charge_exchange_species_prop0008.png

Charge exchange potential

http://www.pas.rochester.edu/~adebrech/ChargeExchange/HD209458b_charge_exchange_potential0008.png

Non-rotating Charge Exchange

Using the terminal velocity and mass loss rate from ​this thesis to approximate the wind of an O6 star at the orbit of Jupiter, I get a wind density of ~2x10-18 g/cm3, which is within an order of magnitude of our current values of 4.5-6.5x10-19 g/cm3. Given this, I've queued the rotating tests with the same wind as HD209458b (though technically they should be corrected for a different planetary and stellar mass).

AMR line transfer

Mixed news on this front. Bad news: The (current on the repo) version of the AMR line transfer is taking about double the amount of time on BlueHive as the previous. Good news: Based on one frame, it appears to be working for a full problem (rather than the simplified tests).

I'd like to run this in a profiler, but I haven't yet gotten it working (getting errors when attempting to run through slurm). I may try a run on an interactive session on a single node, though that will be far fewer cores, which may affect the hotspots…

For reference, here's the updated table:

Projection AMR
Total Runtime 43 101 s 110 095 s
Total AMR Time 40 543 s 108 990 s
Relative Time Across All Levels: LineTransfer 56.10% 79.48%
Relative Time Within MaxLevel: LineTransfer 61.06% 84.39%
Relative Times of Each Level: 4 91.87% 94.18%

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