Recent posts

New AMUSE disk image

There is a  new virtual image with the binary release (still based on AMUSE 10.0 updated to 11.0_RC3)

  • Posted: 2017-06-17 11:57 (Updated: 2017-07-12 12:35)
  • Author: pelupes
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AMUSE lecture at UVA on 25 jan 2016

there will be a lecture on AMUSE as part of the UVA's course on Computational Astrophysics.

As well as the tutorial (included in the binary release or virtual box  image), here you can find  exercise 1 and  exercise 2 as well as the hand-in assignment.

  • Posted: 2016-01-24 21:39 (Updated: 2016-01-25 12:01)
  • Author: pelupes
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The AMUSE repository moved to git!

We have moved the repository! is is now living at  https://github.com/amusecode/amuse.

The svn account is still up, but it is now in "read-only" mode, so new commits will fail (it will keep asking for your password).

New AMUSE image available

The OpenSUSE virtual and USB disk  images have been updated to AMUSE 10.0

September 18: AMUSE hands on at the 3rd CHARM meeting

There will be a tutorial and hands-on session at  the 3rd Annual CHARM meeting in Brussels.

This script can be used to start the tutorial in the ULB computer room:  amuse-tutorial

For this tutorial there will be two exercises, which you can find here:  exercise1 and  exercise2.

Additional here is a third  exercise for people that participated in the Comsocomp-CHARM school on radiative transfer.

  • Posted: 2014-09-12 10:31 (Updated: 2014-09-22 12:32)
  • Author: pelupes
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6th nov. 2013: Groningen hands-on and tutorial

Accompanying the AMUSE hands-on and tutorial in Groningen of the 6th of November, there are two exercises which can be found here:

 exercise1 and  exercise2

  • Posted: 2013-11-05 20:59 (Updated: 2013-11-07 13:17)
  • Author: pelupes
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AMUSE code paper

The AMUSE code paper will be out soon in A&A.  Here you can find the preprint.

The code paper, together with this more technical  paper, provides a good starting point if you wish to get an overview of the design and capabilities of AMUSE.

  • Posted: 2013-07-15 14:44 (Updated: 2013-07-15 14:44)
  • Author: pelupes
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New AMUSE image available

A new virtual machine/ USB  image is available. It is based on the binary release.

Amuse version 7.1 released

Today we created a new minor release of AMUSE (version 7.1).

This is a minor release, mostly focussed on fixing bugs in the binaries:

  • Detection of binary release in tests and skipping of tests that need a compiler
  • Update of the mocassin radiative transfer code to 2.02.70
  • Implementation of AMUSE storage format v2.0 (work in progress, not recommended for production use). The default format in this release is still 1.0
  • Update of SeBa to the latests code

The code can be download from the amuse site:  http://www.amusecode.org/

  • Posted: 2012-12-06 14:11 (Updated: 2012-12-06 14:13)
  • Author: vanelteren
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Amuse version 7.0 released

Today we created a new release of AMUSE (version 7.0).

Main items in this release:

  • Several bug fixes and some stability improvements.
  • Updated radiative transfer codes, based on two workshops we have upgraded the integration of two radiative transfer codes (Simplex and SPHray)
  • Enabled support for the pre-main-sequence stellar evolution in the MESA community code.
  • Updated all grid based hydrodynamics codes (Athena, Capreole and MpiAmrVac?). Both Athena and Capreole now support custom user defined boundary conditions, see the grid boundary tutorial.
  • Binaries for Linux and OS X are provided, although not all community codes are fully functional yet (see notes)

The code can be download from the amuse site:  http://www.amusecode.org/

Amuse binary build

Today we announce the availability of AMUSE binary builds.

The binary builds do not depend on any support packages and can be run right after unpacking.

We currenlty provide the following binary builds:

Linux 64bit amuse-latests-Linux_x86_64.tar.gz
OS X 32bit amuse-latests-Darwin_i386.tar.gz
OS X 64bit amuse-latests-Darwin_x86_64.tar.gz

These binaries are updated every day.

Usage:

  1. unpack the package (tar -xvf amuse-latests-Linux_x86_64.tar.gz)
  2. cd to the directory
  3. run ./amuse

This will open an interactive python shell with amuse in the python path.

An example session to run a simple nbody simulation

from amuse.lab import *
code = Hermite()
code.particles.add_particles(new_plummer_model(100))
code.evolve_model(1 | nbody_system.time)
print code.kinetic_energy
print code.potential_energy

You can continue by following the Getting started with AMUSE documentation.

The binary release should run but is still a work in progress, if you encounter any problems please contact us.

  • Posted: 2012-03-01 11:00 (Updated: 2012-03-01 11:02)
  • Author: vanelteren
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Amuse version 5.2 released

Today we created a new release of AMUSE (version 5.2).

Main items in this release:

  • Several bug fixes and some stability improvements.
  • The treatment of multiples and the coupling of gravity forces between codes (BRIDGE) has been improved.
  • The number of community codes in AMUSE has increased. Several researchers have included their gravity codes in AMUSE.
  • Removing unnecessary units (not finished yet). The string unit has been removed from the system. Particle sets and Grids can now store attribute values without units.

The code can be download from the amuse site:  http://www.amusecode.org/trac/wiki/releases

AMUSE Desktop disk image available

Installing all the necessary prerequisites, configuring and building AMUSE is not always straight forward. In order to be able to try out AMUSE if you are on a machine that does not support the prerequisites we have created an disk image ("Appliance") with a fully AMUSE ready desktop system.

This may be the easiest way of getting AMUSE. Just download and extract the raw image to copy to a USB stick or harddrive(*), or download the vmdk image for Virtualbox or Vmware. Note that it is based on a 64 bit OS.

We do not know if this a good way to distribute AMUSE, so if you find this useful let us know!

find it  here

(* example dd command: dd if=myappliance.raw of=/dev/sdx bs=4k replace /dev/sdx by the device you want to copy to. Note that this is destructive! Do not do this unless you know what you are doing.)

  • Posted: 2011-07-18 17:32 (Updated: 2011-07-21 20:25)
  • Author: pelupes
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Changes in several names in the AMUSE code-base

state attributes

We have removed the concept of "state" and "normal" attributes. The difference between "state" and "normal" attributes was never completely worked out.

Originally a code could have "state" attributes that captured the minimal state of the particles or gridpoints of a code. For example a gravitational dynamics code will have "position", "mass" and "velocity" for the state attributes, but the particles can also have "acceleration", "radius" or "potential". In practice we never made good use of this facility and it only made the code hard to read.

Most of this removal is internal to the AMUSE code and should not impact users. The most public change is in the method copy_values_of_state_attributes_to. This method is now called copy_values_of_all_attributes_to. For all scripts in subversion we have updated the code.

evolve and evolve_model

We renamed evolve to evolve_model. The evolve method was defined on most low-level code interfaces. And evolve_model was used in all high-level code. This made it harder to remember the right method to call. We changed all the evolve methods on the low-level interfaces to match the name used in the high-level interfaces. As most scripts will use the high-level interface this should not impact most existing scripts.

Exceptions:

  • sse: evolve was renamed to evolve_star
  • bse: evolve was renamed to evolve_binary

If you're scripts should fail to work after an svn update please send an e-mail to the amuse  mailinglist.

Announcement: Third AMUSE workshop June 27th - July 1st 2011

We are organizing the next AMUSE workshop in Leiden (June 27th - July 1st 2011).

Details can be found on the Third Workshop Page.

AMUSE Weekly Summary, March 28 / April 1, 2011

Last week we saw the release of AMUSE 4.0 amuse-4.0.tar.gz. In this weekly, we will give a short overview about the major changes in this release.

The AMUSE 4.0 release contains an almost complete set of codes and supports multiple methods of interaction between these codes.

New codes

We added support for 2 radiative transfer codes (Mocassin and Simplex), see the iliev test 5 for an example of coupling Simplex with a SPH code.

The gravity domain got extended with added MMC (a Monte Carlo gravity code) and ph4 (Parallel Hermite 4 gravity code). We also integrated AMRVAC (an AMR hydrodynamics code).

Coupling

We implemented a generic function to transform a stellar evolution 1d shell model (from EVTwin or MESA) into a SPH particles model (for an example see hydro_star example). Work is underway to do the reverse.

Gravity and SPH codes can be coupled using a method (bridge) based on Hamiltonian splitting. This method can be used to couple gravity codes (see the validate bridge example ) or provide and external gravity field on a code (see the galactic center example)

The hydro grid codes can be supplied with an external acceleration (Capreole and MPIAMRVAC) or potential field (Athena). For a steady state example see the plummer sphere on grid example.

  • Posted: 2011-04-04 10:47 (Updated: 2012-12-06 14:27)
  • Author: vanelteren
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