Where is the high-pressure side located in relation to the liquid?

In fluid dynamics and pressure systems, the high-pressure side of a tank or system is generally located where the liquid is in a denser state and has a greater weight exerted on it. In this context, the high-pressure side being at the bottom makes sense because the weight of the liquid above exerts pressure downwards, resulting in higher pressure at the bottom of the tank compared to the top.

This principle aligns with the basic understanding of hydrostatic pressure, which states that pressure increases with depth due to the weight of the liquid above. Therefore, the bottom of the liquid will experience the highest pressure, making it the high-pressure side. Conversely, the top of the tank would have the least pressure as it is not bearing any weight from the liquid above it. This understanding is crucial for safely operating and maintaining systems that involve liquids, as it informs decisions related to safety measures and equipment design.