Using Einstein's tea leaf paradox to study nanofluids

Stirring can allow the dispersion of substances evenly in liquid. Einstein's tea leaf paradox is a concept that shows how tea leaves can concentrate in a doughnut shape through a secondary flow effect during stirring. In a new study published in Science Advances, Zehui Zhang and colleagues in physics and engineering in China, demonstrated the Einstein's tea leaf paradox (abbreviated as ETLP) induced concentration in nanofluids.