Here are a few movies Marc did during
his thesis work in order to check
the working of the SPH code. Note that the choice is biased towards
special cases whose outcome was sufficiently surprising to be worth
of a check...
In the following table, M_sun and R_sun are the mass and radius of the
sun. M_1 and M_2 are the (pre-collision) masses of the stars and R_1
and R_2 their radii. V_rel is the relative velocity at infinity,
V_star=sqrt(2*G(M_1+M_2)/(R_1+R_2)) is the relative velocity the stars
would have at contact for V_rel=0.
The movies are encoded with Theora Vorbis (.ogg)
The reason for this format is because it reduces the size of the download
(it's ~70% smaller than avi, mpg, mov etc).
Another important reason is that the Theora format is totally FREE (libre)
(BSD), which means
that everybody can play it without having to resort to privative codecs which,
often, apart from requiring much larger files, are not for free.
If you are browsing with a recent version of firefox, the ogg movies will be
automatically embedded in the page; otherwise you will have to download them
and use, e.g. vlc
If your computer does not
automatically play these files when you click on them, HERE
you'll find the instructions to do
it (for all plataforms, *BSD, GNU/Linux, Apple and windows)
In general, if you are not using firefox, the easiest is to install VLC
(sudo pkg_add vlc)
VLC Debian Ubuntu Linux
(sudo apt-get install vlc)
VLC fedora / RHL Linux
(install RPM Fusion and then su -c 'yum install vlc')
VLC openSUSE Linux
VLC Debian GNU/Linux
VLC Gentoo Linux