Table of Contents

Name

etude - Hierarchical N-body/SPH code

Synopsis

etude [parameter=value]

Description

etude is an SPH code whereby the gas is (in 2D or 3D) non-selfgravitating in an analytic static background potential. Particles are stored in a tree structure (see treecode1(1NEMO) in order to efficiently find the nearest neighbors required by the SPH algorithm.

Parameters

The following parameters are recognized in any order if the keyword is also given:
in=
Input file with initial conditions []
out=
Output file of N-body frames []
param=
Parameter file of calculation []
freq=
Fundamental integration frequency [32.0]
eps=
Density smoothing length [0.025]
selfgrav=
Compute self-gravity [false]
theta=
Force accuracy parameter [1.0]
usequad=
If true, use quad moments [false]
options=
Various control options []
tstop=
Time to stop integration [3.0]
freqout=
Data output frequency [30.0]
nbody=
Number of bodies for test run [5000]
seed=
Random number seed for test run [123]
save=
Write state file as code runs []
restore=
Continue run from state file []
mode=
Mode of spiral pattern [2.0]
pitch=
Pitch angle of spirals [deg] [10.0]
rinit=
Radius of initial disk [kpc] [3.0]
rcore=
Core radius [kpc] [1.0]
vmax=
Maximum disk rotation [km/s] [220.0]
omgb=
Bar pattern speed [km/s/kpc] [26.1]
fgas=
Mass fraction of gas in unit radius [0.05]
fbar=
Strength of bar potential [0.1]
rcorebh=
Core radius of central black hole [kpc] [0.01]
fbh=
Mass ratio of central BH to the galaxy
alpha=
Coefficient of viscosity [1.0]
beta=
Coefficient of viscosity [2.0]
nnbr=
Requested number of neighbors [32]
nmax=
Maximum number of neighbors [42]
nmin=
Minimum number of neighbors [22]

Examples

See Also

Files

Author

Jin Koda

Update History


23-Oct-07    V1.8 man page created for NEMO version    PJT


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