Africa-Press – Sierra-Leone. The unusual physical properties of liquids manifest themselves not only in the scientific laboratory, but also in real life. It is possible to observe the amazing behavior of water both on Earth and in space. Researchers aboard the International Space Station (ISS) analyzed how water droplets merge in cosmic microgravity.
Typically, water droplets are portions of liquid with a diameter of a couple of millimeters, above this volume, the drop loses its shape, given the surface tension. However, in space, there is almost no gravitational force, so droplets can be much larger.
The experiments were designed to test the Davis-Hawking model, a simple mathematical way to simulate droplets. If the water droplet is on the surface, part of it touches the air and creates an interface, and the part in contact with the surface forms a contact line. The Davis-Hawking model describes the equation for the contact line. Experimental results confirmed and expanded the parameter space of the Davis-Hawking model.
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