Do not dump hydro accelerations in snapshots.

src/hydro/Default/hydro_io.h

@@ -77,7 +77,7 @@ void convert_part_pos(const struct engine* e, const struct part* p,
 void hydro_write_particles(struct part* parts, struct io_props* list,
                            int* num_fields) {
 
-  *num_fields = 8;
+  *num_fields = 7;
 
   /* List what we want to write */
   list[0] = io_make_output_field_convert_part(
@@ -92,9 +92,7 @@ void hydro_write_particles(struct part* parts, struct io_props* list,
                                  UNIT_CONV_ENERGY_PER_UNIT_MASS, parts, u);
   list[5] = io_make_output_field("ParticleIDs", ULONGLONG, 1,
                                  UNIT_CONV_NO_UNITS, parts, id);
-  list[6] = io_make_output_field("Acceleration", FLOAT, 3,
-                                 UNIT_CONV_ACCELERATION, parts, a_hydro);
-  list[7] =
+  list[6] =
       io_make_output_field("Density", FLOAT, 1, UNIT_CONV_DENSITY, parts, rho);
 }
 

src/hydro/Gadget2/hydro_io.h

@@ -89,7 +89,7 @@ void convert_part_pos(const struct engine* e, const struct part* p,
 void hydro_write_particles(const struct part* parts, struct io_props* list,
                            int* num_fields) {
 
-  *num_fields = 10;
+  *num_fields = 9;
 
   /* List what we want to write */
   list[0] = io_make_output_field_convert_part(
@@ -104,14 +104,12 @@ void hydro_write_particles(const struct part* parts, struct io_props* list,
       "Entropy", FLOAT, 1, UNIT_CONV_ENTROPY_PER_UNIT_MASS, parts, entropy);
   list[5] = io_make_output_field("ParticleIDs", ULONGLONG, 1,
                                  UNIT_CONV_NO_UNITS, parts, id);
-  list[6] = io_make_output_field("Acceleration", FLOAT, 3,
-                                 UNIT_CONV_ACCELERATION, parts, a_hydro);
-  list[7] =
+  list[6] =
       io_make_output_field("Density", FLOAT, 1, UNIT_CONV_DENSITY, parts, rho);
-  list[8] = io_make_output_field_convert_part("InternalEnergy", FLOAT, 1,
+  list[7] = io_make_output_field_convert_part("InternalEnergy", FLOAT, 1,
                                               UNIT_CONV_ENERGY_PER_UNIT_MASS,
                                               parts, convert_u);
-  list[9] = io_make_output_field_convert_part(
+  list[8] = io_make_output_field_convert_part(
       "Pressure", FLOAT, 1, UNIT_CONV_PRESSURE, parts, convert_P);
 
 #ifdef DEBUG_INTERACTIONS_SPH

src/hydro/Minimal/hydro_io.h

@@ -103,7 +103,7 @@ void convert_part_pos(const struct engine* e, const struct part* p,
 void hydro_write_particles(struct part* parts, struct io_props* list,
                            int* num_fields) {
 
-  *num_fields = 10;
+  *num_fields = 9;
 
   /* List what we want to write */
   list[0] = io_make_output_field_convert_part(
@@ -118,13 +118,11 @@ void hydro_write_particles(struct part* parts, struct io_props* list,
                                  UNIT_CONV_ENERGY_PER_UNIT_MASS, parts, u);
   list[5] = io_make_output_field("ParticleIDs", ULONGLONG, 1,
                                  UNIT_CONV_NO_UNITS, parts, id);
-  list[6] = io_make_output_field("Acceleration", FLOAT, 3,
-                                 UNIT_CONV_ACCELERATION, parts, a_hydro);
-  list[7] =
+  list[6] =
       io_make_output_field("Density", FLOAT, 1, UNIT_CONV_DENSITY, parts, rho);
-  list[8] = io_make_output_field_convert_part(
+  list[7] = io_make_output_field_convert_part(
       "Entropy", FLOAT, 1, UNIT_CONV_ENTROPY_PER_UNIT_MASS, parts, convert_S);
-  list[9] = io_make_output_field_convert_part(
+  list[8] = io_make_output_field_convert_part(
       "Pressure", FLOAT, 1, UNIT_CONV_PRESSURE, parts, convert_P);
 }
 

src/hydro/PressureEntropy/hydro_io.h

@@ -101,7 +101,7 @@ void convert_part_pos(const struct engine* e, const struct part* p,
 void hydro_write_particles(struct part* parts, struct io_props* list,
                            int* num_fields) {
 
-  *num_fields = 11;
+  *num_fields = 10;
 
   /* List what we want to write */
   list[0] = io_make_output_field_convert_part(
@@ -116,17 +116,15 @@ void hydro_write_particles(struct part* parts, struct io_props* list,
       "Entropy", FLOAT, 1, UNIT_CONV_ENTROPY_PER_UNIT_MASS, parts, entropy);
   list[5] = io_make_output_field("ParticleIDs", ULONGLONG, 1,
                                  UNIT_CONV_NO_UNITS, parts, id);
-  list[6] = io_make_output_field("Acceleration", FLOAT, 3,
-                                 UNIT_CONV_ACCELERATION, parts, a_hydro);
-  list[7] =
+  list[6] =
       io_make_output_field("Density", FLOAT, 1, UNIT_CONV_DENSITY, parts, rho);
-  list[8] = io_make_output_field_convert_part("InternalEnergy", FLOAT, 1,
+  list[7] = io_make_output_field_convert_part("InternalEnergy", FLOAT, 1,
                                               UNIT_CONV_ENERGY_PER_UNIT_MASS,
                                               parts, convert_u);
-  list[9] = io_make_output_field_convert_part(
+  list[8] = io_make_output_field_convert_part(
       "Pressure", FLOAT, 1, UNIT_CONV_PRESSURE, parts, convert_P);
-  list[10] = io_make_output_field("WeightedDensity", FLOAT, 1,
-                                  UNIT_CONV_DENSITY, parts, rho_bar);
+  list[9] = io_make_output_field("WeightedDensity", FLOAT, 1, UNIT_CONV_DENSITY,
+                                 parts, rho_bar);
 }
 
 /**