...
If you want to experiment with different strength values please be careful. Since gravity is an accelerating force, it strongly affects the behaviour of fluids. It is possible to create “denser” fluids with higher values or to avoid exaggerated splashes, but changes cause the fluid to behave completely differently.
Affect
Particles can be affected in two ways: either by “Force” or “Velocity”. The first option applies an external force, resulting in an acceleration, while the second one only modifies the velocities of the particles without introducing an additional acceleration. Forces take a little time to display their full influence. This means that they accelerate the particles over a certain time span depending on their strength. High forces exert stronger accelerations and the particles or bodies become faster and faster as long as the force acts on them. The result is a curved stream of particles.
...