bad_bursters
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bad_bursters [2014/06/05 14:45] schwartz Parameters |
bad_bursters [2014/06/09 13:24] (current) lauer |
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| ===== Log Book ===== | ===== Log Book ===== | ||
| - | * Input Person (Sarah Schwartz) | + | ===Input: Sarah Schwartz=== |
| * [X] X-ray bursts | * [X] X-ray bursts | ||
| * [X] Accretion rate ~ 10^-8 Solar Mass / yr | * [X] Accretion rate ~ 10^-8 Solar Mass / yr | ||
| Line 18: | Line 18: | ||
| * [ ] Density of in falling material | * [ ] Density of in falling material | ||
| * [X] Alpha parameter = 0<alpha<1 | * [X] Alpha parameter = 0<alpha<1 | ||
| - | * Code Person (Justin Brown) | + | ===Code: Justin Brown=== |
| + | [[https://github.com/brownjustinmichael/VH1|Link to Code on GitHub]] | ||
| * 2D | * 2D | ||
| * [X] Get the VH-1 polar model working. | * [X] Get the VH-1 polar model working. | ||
| Line 46: | Line 47: | ||
| * [X] Inviscid (alpha = 0.0) | * [X] Inviscid (alpha = 0.0) | ||
| * [] Run models with uotflo = -1.0, votflo = 0.2, xmax = 10.0 | * [] Run models with uotflo = -1.0, votflo = 0.2, xmax = 10.0 | ||
| - | * Analysis Person (Amber Lauer) | + | ===Analysis: Amber Lauer=== |
| * [x] Get visualization working | * [x] Get visualization working | ||
| * [x] Install NetCDF | * [x] Install NetCDF | ||
| * visit on ubuntu/linux was a quagmire, went with windows virtualbox installation :( | * visit on ubuntu/linux was a quagmire, went with windows virtualbox installation :( | ||
| * [x] Gathering the initial conditions for novae and X-ray bursts | * [x] Gathering the initial conditions for novae and X-ray bursts | ||
| - | * have average values for NS and WD, time permitting will constrain to single case and derive from scratch | + | * have average values for NS and WD, time permitting will constrain to single case and derive |
| - | * [ ] Determine the input abundances | + | *[x] PRESENTATION |
| - | * [ ] Build the nuclear network for the problem | + | * [x] Outline concepts and highlight theory for presentation |
| + | * [x] Encode .cdf data to video for presentation | ||
| + | * [x] Compile references for presentation | ||
| + | * [x] Compile images for presentation | ||
| + | |||
| + | |||
| + | Determined to be outside scope of project. | ||
| + | <del> | ||
| + | * [ ] Determine the input abundances | ||
| + | * [ ] Build the nuclear network for the problem | ||
| * [ ] Take output from the codes | * [ ] Take output from the codes | ||
| * [ ]determine when hydrogen burning begins | * [ ]determine when hydrogen burning begins | ||
| * [ ]analyze data values to optimize scale(linear vs log) and ranges(0-?) for visualization | * [ ]analyze data values to optimize scale(linear vs log) and ranges(0-?) for visualization | ||
| + | </del> | ||
| - | Link to Code on GitHub: [[https://github.com/brownjustinmichael/VH1|External Link]] | + | =====RESULTS===== |
| + | 1D on a solid surface was successful so the 2D case was the bulk of the project work. The solid case was unstable and resulted in an non-physical explosion. Both the infall and reflective cases were attempted, we found the [] to be optimal. We were able to model a non-viscous and viscous case using hydronamic force and energy equation. Terms for the extremely large B field (10^7-8 T) were not included. Both accreted around the central mass with a large high pressure/empty barrier for the non-viscous case, as the angular momentum is not dissipated. The viscous case correctly accreted on to the surface. | ||
| - | Parameter sources | + | [[https://docmgmt.nscl.msu.edu/share/proxy/alfresco/api/node/content/workspace/SpacesStore/8e4a7857-347b-4603-9f64-bf2422ff5e7e/Simulating%20Accretion%20on%20Degenerate%20Matter%20to%20Model%20Surface.pdf|Presentation PDF]] |
| + | |||
| + | [[https://docmgmt.nscl.msu.edu/share/proxy/alfresco/api/node/content/workspace/SpacesStore/e6353d93-8726-45d6-bcf4-d2e3366fdb46/inviscid.mpg|video of non viscous accretion]] | ||
| + | |||
| + | [[https://docmgmt.nscl.msu.edu/share/proxy/alfresco/api/node/content/workspace/SpacesStore/507d83f6-8cc2-46c4-a1ee-34fc6e3e3889/viscous.mpg|video of viscous accretion]] | ||
| + | |||
| + | [[https://docmgmt.nscl.msu.edu/share/proxy/alfresco/api/node/content/workspace/SpacesStore/d4a5588e-c2ce-4136-bb49-78cbf8b1e959/zero%20pressure.mpg|video of accidental zero pressure accretion]] | ||
| + | |||
| + | |||
| + | References: | ||
| *Accretion Power in Astrophysics - Frank, King, Raine | *Accretion Power in Astrophysics - Frank, King, Raine | ||
| *Accretion Disk for Beginners : [[http://www.astronomy.ohio-state.edu/~ryden/ast825/ | External Link]] (Notes PDF) | *Accretion Disk for Beginners : [[http://www.astronomy.ohio-state.edu/~ryden/ast825/ | External Link]] (Notes PDF) | ||
| + | (further resources in presentation) | ||
| + | |||
| + | |||
| ~~DISCUSSION|Comments~~ | ~~DISCUSSION|Comments~~ | ||
bad_bursters.1401993940.txt.gz · Last modified: 2014/06/05 14:45 by schwartz
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