In a diagram of the particles in a liquid, make sure that they are mostly touching but randomly arranged. If there are large spaces between the particles, you would be able to compress the liquid.

For example, high accuracy calculations can require tens-of-thousands of Feynman diagrams to be entered into a computer, to describe particle interactions.

Liang Zhang, JiaWei Zhou, Bo Zhang, Wei Gong, Numerical investigation on the solid particle erosion in elbow with water–hydrate–solid flow, Science Progress (1933-), Vol. 103, No. 1 (2020), pp. 1-25 ...

Almost everything is made of particles. Particles can be atoms, molecules or ions. Particles behave differently in solids, liquids and gases. The particle model explains the differences between ...