From e7058d02a83557b95a01d2e879c411a4953a8b57 Mon Sep 17 00:00:00 2001
From: Matthieu Schaller <schaller@strw.leidenuniv.nl>
Date: Wed, 16 Dec 2020 23:27:32 +0100
Subject: [PATCH] Set the minimal smoothing length of SPH particles to 0.01 of
the comoving softening lengths in all the XL parameter files
---
examples/EAGLE_ICs/EAGLE_100/eagle_100.yml | 2 +-
examples/EAGLE_ICs/EAGLE_12/eagle_12.yml | 2 +-
examples/EAGLE_ICs/EAGLE_25/eagle_25.yml | 2 +-
examples/EAGLE_ICs/EAGLE_25_low_res/eagle_25.yml | 2 +-
examples/EAGLE_ICs/EAGLE_50/eagle_50.yml | 2 +-
examples/EAGLE_ICs/EAGLE_50_low_res/eagle_50.yml | 2 +-
examples/EAGLE_ICs/EAGLE_6/eagle_6.yml | 2 +-
examples/EAGLE_ICs/README | 2 ++
8 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/examples/EAGLE_ICs/EAGLE_100/eagle_100.yml b/examples/EAGLE_ICs/EAGLE_100/eagle_100.yml
index 446447972f..c0180fd68b 100644
--- a/examples/EAGLE_ICs/EAGLE_100/eagle_100.yml
+++ b/examples/EAGLE_ICs/EAGLE_100/eagle_100.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml b/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml
index 4ed5dc838f..876abc4358 100644
--- a/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml
+++ b/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml b/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml
index 926f64b207..74f16e9441 100644
--- a/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml
+++ b/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/EAGLE_25_low_res/eagle_25.yml b/examples/EAGLE_ICs/EAGLE_25_low_res/eagle_25.yml
index ecddfa2d04..fe0ab84594 100644
--- a/examples/EAGLE_ICs/EAGLE_25_low_res/eagle_25.yml
+++ b/examples/EAGLE_ICs/EAGLE_25_low_res/eagle_25.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml b/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml
index bf8f2229b6..6c7dea4d27 100644
--- a/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml
+++ b/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/EAGLE_50_low_res/eagle_50.yml b/examples/EAGLE_ICs/EAGLE_50_low_res/eagle_50.yml
index cc1b13b968..066529edfa 100644
--- a/examples/EAGLE_ICs/EAGLE_50_low_res/eagle_50.yml
+++ b/examples/EAGLE_ICs/EAGLE_50_low_res/eagle_50.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/EAGLE_6/eagle_6.yml b/examples/EAGLE_ICs/EAGLE_6/eagle_6.yml
index 7dd7cb43db..97715ae389 100644
--- a/examples/EAGLE_ICs/EAGLE_6/eagle_6.yml
+++ b/examples/EAGLE_ICs/EAGLE_6/eagle_6.yml
@@ -50,7 +50,7 @@ Gravity:
# Parameters for the hydrodynamics scheme
SPH:
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.
CFL_condition: 0.2 # Courant-Friedrich-Levy condition for time integration.
minimal_temperature: 100.0 # (internal units)
diff --git a/examples/EAGLE_ICs/README b/examples/EAGLE_ICs/README
index 1d12e9422a..b0b07cc7bf 100644
--- a/examples/EAGLE_ICs/README
+++ b/examples/EAGLE_ICs/README
@@ -21,6 +21,8 @@ the following changes have been made (at standard resolution):
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
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
initial gas particle mass) are now split into 2 equal mass
particles within the smoothing length of the original particle.
--
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