PRACTICAL POSSIBILITIES

1. - Determination of the viscosity of liquids.
2. - Drag coefficient of various particles of spheres.
3. - Determination of the drag coefficient of various geometric shapes (to be produce by students).
4. - Measurements of the spheres resistance coefficients vs Reynold’s number.
5. - The viscosity of the liquids place in the tubes by measurement of the terminal velocities of the spheres in free fall in the liquids.
6. - Kinematic viscosity.
7. - Dynamic viscosity

The unit “ HVB” makes it possible to measure kinematic viscosity, and thus to deduce dynamic viscosity from it, from liquids.
This unit consists of two precision transparent tubes fixed onto a frame.
The viscosity of a fluid characterizing its resistance to flow, it is considered that the displacement study of a body in a motionless liquid is identical to that the flow of the fluid around this static body.
By measuring the falling speed of a sphere in a vertical tube filled with the fluid to study, it is possible to deduce kinematic viscosity.
During the phase of the uniform rectilinear motion, the forces which apply to the sphere, gravity, the pressure of Archimedes and the force of the trail related to viscous friction, are in balance.
Anodized aluminium structure.
Support panel.
2 Precision transparent methacrylate tubes of 125 mm. diameter and 1500 mm length.
There are two liquids with different viscosities inside the tubes.
At the upper part of the tubes there is a device for introducing particles to be tested.
At the bottom part of the tubes there is a device for recovering the tested bodies, without emptying the tubes.
Fluorescent tube for a better visualization of the particles. 2 vats and 2 valves for recovery of the balls and draining of tubes. 1 set of balls (spheres) of various diameters and materials (stainless steel,
aluminium, plastic).
Stop watch.
Falling particles/spheres clearly visible.
Accurate determination of drag coefficient and viscosities.
Variety of particles for comparison.
Manuals: This unit is supplied with 8 manuals.
Dimensions (approx.): 300 x 400 x 1700 mm. Weight: 30 Kg.
Cables and Accessories, for normal operation.