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Commit e7058d02 authored by Matthieu Schaller's avatar Matthieu Schaller
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Set the minimal smoothing length of SPH particles to 0.01 of the comoving...

Set the minimal smoothing length of SPH particles to 0.01 of the comoving softening lengths in all the XL parameter files
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...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -50,7 +50,7 @@ Gravity: ...@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme # Parameters for the hydrodynamics scheme
SPH: SPH:
resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
h_min_ratio: 0.1 # Minimal smoothing length in units of softening. h_min_ratio: 0.01 # Minimal smoothing length in units of softening.
h_max: 0.5 # Maximal smoothing length in co-moving internal units. h_max: 0.5 # Maximal smoothing length in co-moving internal units.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration. CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units) minimal_temperature: 100.0 # (internal units)
......
...@@ -21,6 +21,8 @@ the following changes have been made (at standard resolution): ...@@ -21,6 +21,8 @@ the following changes have been made (at standard resolution):
been changed to 1.79 ckpc. This follows the recommendations of been changed to 1.79 ckpc. This follows the recommendations of
Ludlow et al. 2019. Old values were 0.7 pkpc and 2.69 ckpc for Ludlow et al. 2019. Old values were 0.7 pkpc and 2.69 ckpc for
all the particle species. all the particle species.
- The minimal smoothing length of SPH particles has been reduced
to 0.01 of the softening length (was 0.1).
- SPH particles reaching a mass larger than 7*10^6 Msun (~4x the - SPH particles reaching a mass larger than 7*10^6 Msun (~4x the
initial gas particle mass) are now split into 2 equal mass initial gas particle mass) are now split into 2 equal mass
particles within the smoothing length of the original particle. particles within the smoothing length of the original particle.
......
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