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CosmoBazar

Informations on cosmological simulation visualization

Contents:

Introduction
Documentation and support
Visualization Installation
Run Visualization
To test snapshot
Create movie

Introduction

All informations come from Arnaud Borde.

This page provides documentation and instructions for installing programs to create images or movies from Gadget simulation.

Documentation and support

Note Arnaud Borde: simu.pdf
- Ouebpage references: zooming-in-on-clouds-of-hydrogen-when-the-universe-was-young
Simulation done with: gadget-2
- users-guide-gadget-2.pdf
Visualization done with: Splotch
Data
- Simulation 1 (evolution from Z=15 to Z=0, constant step in log?)
  - available on oxal at /home/tera/aborde/20_128_neutrino/
  - cube side: 20 Mpc/h
  - 128³ for 3 different type of particles(10¹⁰M_☉/h): baryon (stars & gaz), CDM, neutrinos (Σν_1,2,3= 0.8 eV)
- Simulation 2 (evolution from Z=30 to Z=0, constant step in log?)
  - available on CURIE (airain) (~2Tera)
  - cube side: 50 Mpc/h
  - 512³ for 3 different type of particles(10¹⁰M_☉/h): baryon (stars & gaz), CDM, neutrinos (Σν_1,2,3= 0.4 eV)
- Simulation 3 (evolution from Z=30 to Z=0, constant step in log?)
  - available on CURIE (airain) (~2Tera)
  - cube side: 10 Mpc/h
  - 512³ for 3 different type of particles(10¹⁰M_☉/h): baryon (stars & gaz), CDM, neutrinos (Σν_1,2,3= 0.4 eV)
- Simulation 4 to 9 (evolution from Z=30 to Z=2.2, 13 step between 4.6 -> 2.2, Planck/BAO best guest) done by Christophe Magneville
  - available on CURIE (airain) for neutrinos (Σν_1,2,3= 0 eV) and neutrinos (Σν_1,2,3= 1 eV)
    - cube side 100 Mpc/h
    - 768³, for 3 different type of particles(10¹⁰M_☉/h): baryon (stars & gaz), CDM, neutrinos (Σν_1,2,3= 0 eV)
    - cube side 25 Mpc/h
    - 768³, for 3 different type of particles(10¹⁰M_☉/h): baryon (stars & gaz), CDM, neutrinos (Σν_1,2,3= 0 eV)
    - cube side 25 Mpc/h
    - 192³, for 3 different type of particles(10¹⁰M_☉/h): baryon (stars & gaz), CDM, neutrinos (Σν_1,2,3= 0 eV)

Visualization Installation

On OXAL (idem sur airain)
- Sap machine, supports and authorization:frederic.bournaud@cea.fr
- install Splotch (with the modification done by Arnaud to connect the 6 cube faces together)
- copy in your work directory the following files:
  - Get create_evolution.py.txt & do
```
 mv create_evolution.py.txt create_evolution.py
```
  - Get create_rotation.py.txt & do
```
 mv create_rotation.py.txt create_rotation.py
```
  - Get evolution_gaz.par
- grab the following commands in your work directory:

cd ../Splotch/Splotch-4.4-Modified
make
mkdir MonEvolutionPerso
cd MonEvolutionPerso
ln -fs ../Splotch/Splotch-4.4-Modified/Splotch4.4OXAL-opti .
ln -fs ../Splotch/Splotch-4.4-Modified/palettes

Run Visualization

example On OXAL

#  number of core used for the calculation
export OMP_NUM_THREADS = 4
# create different points of view of the same simulation
python create_rotation.py
# define evolution
# or this choice: python create_evolution.py
# create the list of images (*.tga) for a given parametrization
./Splotch4.4OXAL-opti evolution_gaz.par

example On AIRAIN
- with evolution_gaz_oneshot.par

#  number of core used for the calculation
export OMP_NUM_THREADS = 4
# image for a given simulation at given Z (define by the set of data analyzed)
./Splotch4.4OXAL-opti evolution_gaz_oneshot.par

To test snapshot

Format of snapshot:FormatDataSnapshot
program python to do it
- header.py.txt: header.py.txt
- header.py.txt: header.py.txt

Create movie

On a linux machine with ffmpeg

# first convert .tga in ffmpeg known format (png,jpg,...) probably with resolution losses (find convert options)
for i in *.tga; do echo convert $i ${i%.tga}.png; done
# create film
ffmpeg -i evolution_gaz_%06d.png tartempion.avi

-- LaurentChevalier - 24 Jan 2014

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
ext	FormatDataSnapshot	r1	manage	1.4 K	2014-02-06 - 14:05	LaurentChevalier
txt	create_evolution.py.txt	r1	manage	0.9 K	2014-01-24 - 15:18	LaurentChevalier
txt	create_rotation.py.txt	r1	manage	0.9 K	2014-01-24 - 15:19	LaurentChevalier
par	evolution_gaz.par	r1	manage	1.6 K	2014-01-24 - 15:19	LaurentChevalier
par	evolution_gaz_oneshot.par	r1	manage	2.6 K	2014-03-10 - 14:17	LaurentChevalier
txt	header.py.txt	r1	manage	2.9 K	2014-02-06 - 14:05	LaurentChevalier
pdf	simu.pdf	r1	manage	1677.5 K	2014-01-24 - 11:46	LaurentChevalier
gif	snap.gif	r1	manage	423.7 K	2014-01-24 - 14:31	LaurentChevalier
pdf	users-guide.pdf	r1	manage	260.0 K	2014-03-10 - 14:49	LaurentChevalier

Topic revision: r6 - 2014-03-10 - LaurentChevalier

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