Changes between Version 14 and Version 15 of u/erica/RadHydro


Ignore:
Timestamp:
03/30/16 10:36:28 (9 years ago)
Author:
Erica Kaminski
Comment:

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  • u/erica/RadHydro

    v14 v15  
    6767== Radiation with a source ==
    6868
    69 Now we add a radiating source to the grid.
     69Now we add a radiating source to the grid. Here is the initial condition:
    7070
    7171[[Image(DiffusionWave_IC.png, 35%)]]
    7272
     73Over time the energy (which is continuously being injected into the center few zones), diffuses into the uniform medium:
     74
    7375[[Image(DiffusionWave.png, 35%)]]
     76
     77How fast this diffusion takes place depends on [[latex($\kappa_R$)]]. Once E has diffused into the adjacent cells, [[latex($E>B$)]], and so, [[latex($\rho e$)]] will increase in those zones. This leads to an increase in T, and thus, an increase in B. How fast the energy is transferred from the radiation field to the gas depends on [[latex($\kappa_P$)]]. Adjusting the planck opacity can be thought of then as adjusting the specific heat capacity of the gas. A large [[latex($\kappa_P$)]] means the gas can absorb the radiation quickly (and thus the radiation and gas are strongly coupled), and vice versa.