Maxwell speed distribution

  • Thread starter b.hessen
  • Start date
  • #1
b.hessen
2
0
halo, I´m stuck in an definite integral...

P(v)=4π (M2πRT)3/2⋅v2⋅e−Mv2nRT (maxwell speed distribution)

How can I calculate the fraction of Ar in mars?

pd. I got already the scape velocity

But... How can I intregrate and evaluate between (0, 5XE3 m/s) or (5XE3 m/s, infinite) ??

Is there any tables for evaluate this??

thanks
 

Answers and Replies

  • #2
clamtrox
938
9
You can at least find tabulated values for the error function, erf(x) = 0x dx' exp(-x'^2). It might be easier just to plug in the numbers and integrate numerically, for example by using wolfram alpha.
 
  • #3
b.hessen
2
0
thanks...
I calculated in Origin 8.5 (five minutes) trapezoids area... 50 000 intervals... It work as well and "rough" solution, good for giving a fast solution.
 

Suggested for: Maxwell speed distribution

  • Last Post
Replies
10
Views
1K
Replies
3
Views
441
Replies
1
Views
386
Replies
23
Views
767
Replies
6
Views
553
  • Last Post
Replies
13
Views
470
Replies
0
Views
476
  • Last Post
Replies
2
Views
1K
Replies
3
Views
2K
Top