The radiation module

The radiation moduleThe radiation module

Current status

Substitute for heat conduction

2

Useful units, etc

3

Number of directions, etc

4

Number of directions, etc

5

rays dimension timing0 3-D 1.9

6 3-D 3.1

22 3-D 6.8

1 ray means just 1 direction Useful for volume rendering

Axel Brandenburg: Lightsabers 6

Volume renderingVolume rendering

• Want to see everything in the volume• Forground should cover background stuff• More than just one field• Different colors…

Axel Brandenburg: Lightsabers 7

Mutual obscuration as with lightsabersMutual obscuration as with lightsabers

SII n̂22 , BSB

Axel Brandenburg: Lightsabers 8

Transfer equation & parTransfer equation & paraallelizationllelization

Analytic Solution:

Ray direction

Intrinsic Calculation

Processors

SII

dd

Axel Brandenburg: Lightsabers 9

The Transfer Equation & The Transfer Equation & ParParaallelizationllelization

Analytic Solution:

Ray direction

Communication

Processors

Axel Brandenburg: Lightsabers 10

The Transfer Equation & The Transfer Equation & ParallelizationParallelization

Analytic Solution:

Ray direction

Processors

Intrinsic Calculation

Axel Brandenburg: Lightsabers 11

Source function & opacitySource function & opacity22 , BSB

Axel Brandenburg: Lightsabers 12

Different colors/frequencies?Different colors/frequencies?

SII n̂22

212

22

1 , , BSBS

13

Future developmentsFuture developments

• Adaptive/multiple mesh• More 3-D online graphics output• Poisson solver for non-Cartesian geometries• Parallel developments with graphics card

14

1-D atmospheres1-D atmospheres• Radiative boundary condition• Full radiation transfer

15

1-D atmospheres1-D atmospheres• Radiative boundary condition• Full radiation transfer

16

1-D atmospheres1-D atmospheres• Full radiation transfer

17

1-D radiative transfer1-D radiative transfer

22

22

1 rate cooling

kkk

18

1-D radiative transfer1-D radiative transfer

22

/1/

rate cooling

ckck

kck

19

2-D radiative transfer2-D radiative transfer

2/1factor empirical 22

2

kk

angle_weight corrected?

20

angle_weight=‘corrected’

21

Axel Brandenburg: Lightsabers 22

Color tableColor table

0 15

16 31

255240

br 16color

Axel Brandenburg: Lightsabers 23

MovieMovie