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Major VersionM

by Vishal Bhatt

Tools

    • Exercise caution when using scissors.

    • Do not touch the hot portion of the metal wire.

    • Be vigilant when tightening the nylon thread as too much pressure will result in "paper cut"

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  1. Take one of the provided containers, invert it, and using ruler and sketch pen draw axis lines as shown in the figure to identify the center.
    • Take one of the provided containers, invert it, and using ruler and sketch pen draw axis lines as shown in the figure to identify the center.

    • Measure and mark two points, 1 cm from the outer edge on the axis line.

    • Heat the sharp end of the metal wire in flame.

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    • On the marked points, make two holes of size that allows the nylon thread to comfortably pass through.

    • This container will be at the top through which the liquid will drip.

    • It is important to be precise about the size and shape these two holes.

    • Take the other container's lid and using ruler and sketch pen draw lines as shown in the figure to identify the center

    • Mark four points on the inner circular line that runs on the lid where it intersects the axis lines.

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    • Using Scissors, make holes on four points.

    • Make these holes as wide as possible without damaging the cap.

    • Having wider holes ensure that oil does not spill over from the lid and keeps up with the rate of flow from the top container.

    • These four holes will act as "drain" holes through which the oil enters the bottom container.

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    • Take the container in which you made the holes at its base.

    • Now align one end of the wooden skewer along the wall of the container such that the skewer is in the same axis of the holes and tape it.

    • Use enough tape to secure the wooden skewer firmly

    • Align another skewer along wall the of the container such that it is diametrically opposite to the first skewer and tape it.

    • Use enough tape to secure the wooden skewer firmly.

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    • Take the container in which you made holes on the lid.

    • Now, on the other end of the wooden skewers, align and tape the container in a way that holes are parallel to the holes on the top container.

    • The skewers should not protrude beyond the container

    • Use enough tape to firmly secure the skewers

    • Now, the setup should be able to 'stand' on its own.

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    • Top container

    • Bottom container

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    • Insert the nylon thread through any of the holes in the top container and pull it out through its base.

    • Remove the lid from the bottom container.

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    • Insert the nylon thread through the parallel hole on the lid of the bottom container.

    • Again, pass the nylon thread through the adjacent hole on the lid of bottom container.

    • Now, it looks like a loop on the lid of bottom container.

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    • Close the lid of the bottom container.

    • Now, pass the nylon thread through the parallel hole on the top container.

    • You will now have two ends of the nylon thread on the top container.

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    • For your convenience in the knotting process, bring the two ends of the thread outside the container.

    • Make two knots tightly.

    • Now pull both ends of the thread to bring the whole loop under tension.

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    • Once the thread loop is under tension, make two more knots to secure the tension.

    • Using scissors, trim off the excessive thread.

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    • Remove the lid of bottom container

    • By applying push-pull forces on the thread loop, carefully move the knot beneath the lid.

    • Close the lid.

    • The idea here is to have the flow unobstructed by the knot.

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    • As we are dealing with viscous fluids, it is advisable to conduct the experiment over layers of paper or a cloth.

    • Gradually pour the sample into the top container.

    • In case of thinner fluids like milk and coconut oil, do not pour the fluid all at once as the drain holes may not be enough to keep up with the rate of flow.

    • Try with different samples like Coconut oil, Castor oil, Milk, Glycerin, and honey.

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    • The setup is not firm and stable.

    • The wooden skewers are angled and not straight

    • The Nylon thread is not under tension and too loose for the flow

    • The holes are too large that the flow is not controlled and liquid flows instantaneously

    • The holes are too small for the flow to start

    • The "Drain" holes are too small that the fluid overflows from the lid.

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Finish Line

Kailash NR

Member since: 05/02/2017

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