Phys.org  January 7, 2022 Without any obstacle, the fluid flows along a straight line. If an obstacle is present, the straight streamline will be defected, and an observer can sense the size, shape, and position of the obstacle. Guiding the fluid to flow faster closer to the obstacle and slower farther from it conceals the distortions and restore original straight streamlines. Instead of engineering the mass density of the fluid to control the speed of the fluid flow, researchers in Singapore simply engineered the thickness of the fluid channel. They showed that thicker fluid channel gives rise to smaller mass […]