Changes between Version 10 and Version 11 of AccretionDiskTutorial

Timestamp:

08/26/12 13:24:46 (14 years ago)

Author:

idilernia

Comment:

—

AccretionDiskTutorial

@@ -23 +23 @@
 [[Image(famil.png, 1100px)]]
 
-Different elements can be recognized in the image above:
+At his point you should start to get familiar with some of the elements in the image above:
 - GxBounds: the boundaries of the plot, namely the physical boundaries of the simulation
 - Radius: the radius of the disk
@@ -55 +55 @@
 
 === Scales ===
+
+Scales are parameters that can actively affect the outcome of a simulation. [[BR]]
+Physics.data contains a section dedicated to the setting of scales:
+
+{{{
+nScale          =       0.0,    ! number density scale parameter [particles/cc] 
+rScale          =       1d0,    ! density scale [g/cc], nScale is ignored !!! NOTE: if = 0 then nScale is used to find rScale
+TempScale       =       1000d0, ! temperature scale parameter [Kelvin]
+pScale          =       0.0,    ! pressure scale [dynes/cm^2], TempScale is ignored !!! NOTE: if = 0 then TempScale is used to find pScale
+lScale          =       .5e10   ! length scale parameter [cm] (defines 1 computational unit!!!)
+
+}}}
+
+It is good practice to adapt the scales to the specific needs of a simulation, let's see an example:[[BR]]
+In the code listed in the Initial Conditions section we set the disk radius to be 2e10cm, with that, we set our length scale parameter (lScale) to be .5e10cm[[BR]]
+this will result in R,,disk,,/lScale = 4.
+
 === Softening ===
 === Fixed grid to AMR ===