This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
bad_bursters [2014/06/06 16:28] lauer |
bad_bursters [2014/06/09 13:21] lauer |
||
---|---|---|---|
Line 7: | Line 7: | ||
===== 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 |
- | XX * [ ] 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 | ||
- | XX | + | </del> |
- | Above determined to be outside scope of project. | + | |
- | + | ||
- | + | ||
- | Link to Code on GitHub: [[https://github.com/brownjustinmichael/VH1|External Link]] | + | |
- | Parameter sources | + | =====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. | ||
+ | |||
+ | [[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) | ||
+ | |||
+ | |||
+ | |||
~~DISCUSSION|Comments~~ | ~~DISCUSSION|Comments~~ |