YZHYYDS Fluid Dynamics Demonstration Model, Unidirectional Flow Hourglass, 7-Level Channel, Forward/Reverse and Anti-Backflow, 137.5° Golden Split Angle Design, for PhysicalSchool Laboratory Teaching

YZHYYDS

【Visual Fluid Mechanics Display】This fluid flow hourglass vividly presents intuitive one-way flow features. It lets you clearly witness smooth forward fluid flow and obvious turbulent reverse resistance in seconds, visually restoring authentic fluid mechanics theories in a straightforward way. 【Precision Internal Design】Equipped with 7-layer funnel flow guide structure and refined 137.5° golden split angle. Featuring no movable parts, it creates a flow resistance gap as high as 200 times. Solid integrated structure ensures stable performance and highly accurate demonstration effect. 【Scientific Learning Tool】: Elevate your understanding of fluid mechanics with integrated scientific formulas printed on the base. This provides immediate context, bridging the gap between theoretical equations and real-world physical applications for students. 【Premium Sturdy Material Craftsmanship】Made of high-transparency anti-static ABS shell and high-precision flowing microbeads. Full transparent design fully exposes every flowing detail, matched with a weighted stable base for firm placement on all desktops, free from sliding and shaking. 【Versatile Educational Science Tool】Perfect for physics classroom teaching, popular science courses and household early science education. Help teachers, students and science enthusiasts easily grasp non-return flow principles, Reynolds number and other fluid dynamics knowledge via interesting visual observation.