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“Gravity” adds a force to the scene that acts globally. This means that it is not restricted to a certain area or volume. The force acts everywhere in the scene with exactly the same strength and you can place the emitter at any point in the scene without changing its properties. Now you already have everything for your first simulation. Click on the “Simulate” button and watch the particles, how they become accelerated and fall into the vase. There, they form drops and splashes and fill the object. After 200 frames, the simulations automatically stops and you can scrub the timeline back and forth to evaluate the result. Here is a screenshot from RealFlow's viewport with all scene elements:
To get an impression of the simulation in realtime, it is a good idea to create a preview. Go to the "Main Menu" and choose:
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