By default (ie without a compile time ifdef) the Jeans pressure floor is based on the SPH kernel size, not the gravitational softening. The later makes more sense, at least for cosmology simulations. With the former, low density regions would have very large pressure floors.
Changing this just means having "-DJEANSOFTONLY" set by default at compile time.
trquinn
commented
2 years ago
By default (ie without a compile time ifdef) the Jeans pressure floor is based on the SPH kernel size, not the gravitational softening. The later makes more sense, at least for cosmology simulations. With the former, low density regions would have very large pressure floors. Changing this just means having "-DJEANSOFTONLY" set by default at compile time.