Fluid Dynamics

Progressing fromthis very first idea, a more manageable experiment evolved: measuring plus comparing the terminal velocities of a ball falling via glycerine at various temperatures. Glycerine was selected because its high viscosity1 shows demonstrable results. The quantity of viscous drag within just a given fluid generally seems to vary within a regulated container by temperature. This experiment was designed and conducted to try the following question: How is the terminal velocity of a ball falling through a column of glycerine affected by a change in the temperature of glycerine?

This study analysed the terminal velocities of your object falling under the force of gravity through a fluid at varying temperatures. My hypothesis states that as the temperature of the fluid decreases, the terminal velocity of the object will decrease by way of a proportion of. I base this prediction on the electrostatic bonding properties displayed in liquids. In order to prove this, an experiment will be conducted using a small metal ball and glycerine. The third force exerted on the ball, drag, is definitely in the opposite direction of the movement.

It is very similar to the friction force over a block sliding down a plane, which works inside the opposite direction of the motion. The source of drag comes from the viscosity of the fluid and the incidence of turbulence4 on the ball. At lower velocities, turbulence is small and laminar, whereas at higher velocities, turbulence becomes drastic and contains an enormous effect on the drag force. One can use the Reynolds number, Re, a dimensionless value, to determine the nature from the flow (equation 4).

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