# This file is part of the Snoopy code. # # Snoopy code is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # Snoopy code is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with the Snoopy code. If not, see . # Example of a Snoopy configuration file configname = "MRI problem"; // Only the variable which are different from default are set. physics: // Physics parameters { boxsize = (1.0, 2.0, 8.0); // Box length in X, Y and Z reynolds = 10000.0; // Reynolds number (actually the inverse of the viscosity) reynolds_magnetic = 10000.0; // Magnetic Reynolds number (actually the inverse of the resistivity). Used only when MHD is on omega = 0.6667; // Vertical rotation rate (if Shear=1, Keplerian if found for 2.0/3.0). Used only when WITH_ROTATION is on shear = 1.0; // Shear rate. Used only when WITH_SHEAR is on. }; //------------------------------------------------------------------------------------------------------------------------- code: // code parameters { t_initial = 0.0; // Initial time of the simulation t_final = 10000.0; // roughly 300 orbits // Simulation will stop if it reaches this time max_t_elapsed = 1e30; // Maximum elapsed time (in hours). Will stop after this elapsed time if t_final is not reached. interface_check = 5; // Number of loops between two checks for a user input. On slow filesystems, increase this number interface_output_file = false; // Set to true to force interface outputs to a file instead of displaying them */ restart = false; // set to true to restart from a dump file. If no dump file is found, this option has no effect. }; //------------------------------------------------------------------------------------------------------------------------- output: // output parameters { timevar_step = 0.1; // Time between two outputs in the timevar file snapshot_step = 0.5; // Time between two snapshot outputs dump_step = 1.0; // Time between two restart dump outputs (restart dump are erased) timevar_vars = ( "t","ev","em","vxvy","bxby","x1-KE","x2-KE","x3-KE","x1-ME","x2-ME","x3-ME","vxave","vyave","vzave","bxave","byave","bzave"); }; //------------------------------------------------------------------------------------------------------------------------- init: // Initial conditions parameters { large_scale_noise: // Init a large scale random noise down to cut_length */ { enable = true; // set this to true to enable large scale noise amplitude = 1.0; // noise amplitude cut_length = 0.2; // Wavelength over which the noise is applied }; spatial_structure = true; };