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Enzo user workshop 2014

The 3rd Enzo and yt workshop in Japan will take place at Hokkaido University in Sapporo. This will be a four day meeting from the 18th - 21st November, focusing on both new and more experienced users of Enzo and its main analysis package, yt.

Enzo is a 3D adaptive mesh refinement (AMR) hydrodynamics code for simulating astrophysical objects. It has been used to model a wide range of scales from cosmological simulations of galaxies to the evolution of protoplanetary disks. In addition to gas evolution, Enzo contains routines for star formation, magnetic fields and radiative transfer. A more detailed look at its capabilities can be found in the links below.

yt is an analysis package for simulation data. It supports a large number of astrophysics codes, including Enzo, Ramses, FLASH, Athena, ART, Gadget, Boxlib, MOAB, Tipsy and arbitrary volumes. It can be used for fundamental tasks such as imaging, plots and profiles through to handling data as a basis for more complex scripts.

Both yt and Enzo has an active user and developer community and is freely available. It can run on computers from a laptop to a multicore HPC.


Our workshop

Now in its third year, the Enzo workshop in Japan has successfully introduced new users to the code, as well as provided a discussion centre for advanced use and development. Our participants have joined us from a wide variety of backgrounds, from first year graduate students learning the ropes, to those with experience with different simulation techniques and on to people engaged in larger projects and code development.

We aim to provide instruction in both Enzo and yt with plenty of time for practice and one-to-one assistance. Our belief is that computer simulations are learned best through doing, not listening, so a large part of our workshops are spent with exercises to try out different techniques.

This workshop will welcome back Enzo developers John Wise (Georgia Tech), Britton Smith (University of Edinburgh) and Elizabeth Tasker (Hokkaido University) from previous workshops and introduce developer, Sam Skillman (Stanford University).

As in previous years, talks earlier in the workshop will cover the basics of starting a new simulation with Enzo and producing plots and images of the results. Later presentations will then go on to consider more advanced features of both Enzo and yt.

Participants will have the oppertunity to try the examples on the local computers at Hokkaido, accessed via their laptops. There will also be time for short research presentations. Please let us know if you would like to share your work when registering.

For graduate students and postdocs joining us from Japanese universities, small travel grants are available. Please email us for more information.

All talks will be in English.


Further information

If you would like travel support, or are planning to attend the conference dinner or give a research talk, please sign-up by Friday 7th November.

Please feel free to email us with any questions regarding the workshop. Further information about Enzo can be found in the links below.

The Enzo website

The YT website

Galaxy Theory Group

Hokkaido University


Schedule Outline

If there is a topic you would particularly like to see covered that is not on our program, please let us know! We will be happy to chat individually about ideas and project needs.

Tuesday 18th November

10 am Welcome

Elizabeth Tasker
Hokkaido University

10:15 am Introduction to Enzo Britton Smith
University of Edinburgh
11:15 am First steps with Enzo: compiling and running simple problems
Lunch (12:30 - 2 pm)
2 pm Introduction to yt

Elizabeth Tasker
Hokkaido University

3 pm First steps with yt: creating images and profiles
5 - 6 pm

Research talks

Sabrina Coudry (Tohoku University)
Sunmyon Chon (Tokyo University)
Alex Pettitt (Hokkaido University)


Wednesday 19th November

10 am Cosmological simulations

John Wise
Georgia Tech

11 am Creating and running cosmological simulations
Lunch (12:30 - 2 pm)
2 pm yt for cosmology

Sam Skillman
Stanford University

3 pm Running the yt cosmology toolbox
5 - 6 pm

Research talks

Gen Chiaki (University of Tokyo)
Ken Osato (University of Tokyo)
Shun Saito (Kavli IPMU)


Thursday 20th November

10 am Non-cosmology simulations

Elizabeth Tasker
Hokkaido University

11 am Creating your own simulation
Lunch (12:30 - 2 pm)
2 pm Extracting data with yt: objects and fields and the clump finder.

Britton Smith
University of Edinburgh

3 pm Extracting data with yt (practice)
5 - 6 pm

Research talks

Kazuhiro Shima (Hokkaido University)
Hsi-An Pan (Hokkaido University)


Conference dinner
(fish restaurant "Uoisshin", cost ¥4000)


Friday 21st November

10 am The physics and algorithms of Enzo
(Further details for intermediate users and aspiring developers)

John Wise
Georgia Tech

Britton Smith
University of Edinburgh

11 am Further cosmology analysis with yt (practice)
Lunch (12:30 - 2 pm)
2 pm Further yt: volume rendering, parallelisation, asking for help

Sam Skillman
Stanford University

3 pm Further yt (practice)
Finish 5 pm



Let us know you're coming

Registration is now closed. Keep an eye out for our next meeting.


Accessing Sapporo


Hokkaido University is located in the city of Sapporo on the northern island of Hokkaido. Sapporo is easiest to reach by air, with New Chitose Aiport (CTS) being an approximately 40 minute train ride from the city centre. The direct JR line train from the airport to Sapporo Station costs 1040 yen. There are also buses. More information can be found on the airport's website here.

The University is an easy fifteen minute walk from the station. A map of campus and directions from the station can be found here.

The meeting room on campus is in building 3, room 205. A map of the campus (with the building numbers) can be found here. Building 3 is behind the university museum, close to Ono Pond.

Slides from the workshop


Introduction to Enzo (Britton Smith)
First steps with Enzo

Introduction to yt (Elizabeth Tasker)


Cosmological Simulations (John Wise)
Part II

yt for cosmology (Sam Skillman)
Halo profiling: html and .pdf versions
Cosmology calculator: python notebook and notebook in .pdf form
Creating a lightcone observation: python notebook and .pdf version


Non-cosmological simlations (Elizabeth Tasker)

Extracting data with yt (Britton Smith)
Notebook (.pdf)


The physics and algorithms of Enzo (John Wise)

Finding gas clumps with yt (Britton Smith)
Finding clumps: .pdf and python notebook
Customising clump finding: .pdf and python notebook

Further yt (Sam Skillman)



Excellent 'Science in Action' shots will follow the workshop!