# Runtime parameters for the Bondi-Hoyle accretion problem # with thermal conduction (adapted from windtunnel and # grav_coll problems). # FLY units adopted. We choose a box of 2 Mpc, putting at # (x_cb, y_cb, z_cb) a TIS halo, described by a mass (mass_cb) in # solar mass units (note: given the mass, a TIS halo is fully determined). # Ambient gas temperature is in Kelvin. # Ambient pressure, density and inflow velocity are in FLY units. # A constant inflow of gas at the left y boundary (as in the wind # tunnel problem) allows one to put oneself in the reference # frame in which the halo is at rest. # # Parameters for initial model # r_ind_c = 1.05 h_small = 0.65 rho_ambient = 4.7236e-1 T_ambient = 2.e7 # Note: p_ambient = gascon * rho_ambient * T_ambient # gascon in FLY units: gascon = 1.7278252e-3 p_ambient = 3.4658e0 x_cb = 1.2 y_cb = 1. z_cb = 0. i_fly_units = 1 vt_x = 7.0123 vt_y = 0. vt_z = 0. # Gas ratio of specific heats gamma = 1.6666667 # Computational volume parameters # Grid geometry geometry = "cartesian" igeomx = 0 igeomy = 0 igeomz = 0 # Size of computational volume (in Mpc*h^-1) Nblockx = 12 Nblocky = 8 xmin = 0. xmax = 3. ymin = 0. ymax = 2. # Boundary conditions xl_boundary_type = "user" xr_boundary_type = "outflow" yl_boundary_type = "outflow" yr_boundary_type = "outflow" # Simulation (grid, time, I/O) parameters cfl = 0.8 lrefine_min = 2 lrefine_max = 4 basenm = "/gpfs/temp/asct001/FLASH/bh_cnd_rcl/m4e11/v2.0/t2e7/bh_" restart = .true. cpnumber = 0029 ptnumber = 28 trstrt = 1.e-2 tplot = 1.e-2 tmax = 0.8 dtmax = 1.e-3 nend = 30000 eint_switch = 1.e-8 igrav = 1 refine_filter = 1.e-6 # This is the correction factor of the Spitzer thermal conductivity - # accounts for the redduction/enhancement due to magn. turbulence, # anomalous diffusion, etc. c_spitzer = 1.e-1 diffuse_therm = .true. icool = 1 run_comment = "2-d Bondi-Hoyle accretion with therm. cond." log_file = "/gpfs/temp/asct001/FLASH/bh_cnd_rcl/m4e11/v2.0/t2e7/bh.log" # Specific to TIS profile mass_cb = 4.e11