The discussion centers on the feasibility of using electromagnetic fields to separate two liquids, such as petrol and water, due to their differing magnetic properties. While the idea is intriguing, it is noted that such methods often require more energy than practical applications can afford. Magnetohydrodynamics is mentioned as a related field of study, and centrifuges are suggested as a more efficient alternative for separation, particularly due to their reliance on density differences rather than magnetic properties. However, centrifuges may not be effective for large volumes. The conversation also briefly veers into submarine design, exploring how a dual-hull structure with a vacuum could minimize noise, although this topic is considered somewhat off-topic. Overall, the thread highlights the challenges and considerations in liquid separation techniques and touches on innovative ideas for reducing underwater noise.
