- #1
omicgavp
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We are performing an experiment to determine the viscosity of water using the falling sphere method. I understand that the ratio of the radius of the sphere to the radius of the container has to be within a certain range in order to avoid a false high viscosity value. And a correction factor is needed in the analysis so that the effects of the container walls and ends will be accounted [ref. G.E. Leblanc,et.al., "The Measurement, Instrumentation and Sensors Handbook", Chapter 30:Viscosity Measurement].
We would like to vary the mass and radius of the sphere and calculate the average viscosity. So we would be needing different spheres. Is it ok to have a modelling toy clay as a sphere? We found out that the mass of the clay, which was molded to a sphere, does not change even after it is put into water. Is it also ok to have water as the medium for the sphere? It is observed that the sphere falls through the water quickly. In our experiment, we used a container similar to a beaker but a few inches taller. We also used a camera and the LabVIEW program to record the motion of the sphere. The sphere experiences g (this can be seen by a slight parabolic curve from the y vs. t plot) at a very short time and then abruptly attains terminal velocity (this can be seen from the slope of the the positive straight line from y vs. t also).
I would like to reiterate my questions:
-Is it ok to have a modelling toy clay as a sphere?
-Is it also ok to have water as the medium for the sphere?
We would like to vary the mass and radius of the sphere and calculate the average viscosity. So we would be needing different spheres. Is it ok to have a modelling toy clay as a sphere? We found out that the mass of the clay, which was molded to a sphere, does not change even after it is put into water. Is it also ok to have water as the medium for the sphere? It is observed that the sphere falls through the water quickly. In our experiment, we used a container similar to a beaker but a few inches taller. We also used a camera and the LabVIEW program to record the motion of the sphere. The sphere experiences g (this can be seen by a slight parabolic curve from the y vs. t plot) at a very short time and then abruptly attains terminal velocity (this can be seen from the slope of the the positive straight line from y vs. t also).
I would like to reiterate my questions:
-Is it ok to have a modelling toy clay as a sphere?
-Is it also ok to have water as the medium for the sphere?