User:Afayyaz6843/enes100/Bernoulli Effect

Link back to team page.[]

Give instructor top 3 project choice list
My Top priorities were:

Bernoulli Effect

Model Boat

Corn Starch

Write problem statement
Show the differences between Coanda Effect and Bernoulli Effect

Assign Task1
Research about the prototype that we are going to build. Watch some videos to get the idea of how to demonstrate the difference between the coanda effect and Bernoulli effect. Start working on filling the wikiversity pages. Finish creating the user and team page for our team.

Compare actual work done to Task1
The differences were in the way of explaining things to my team mates. Also in the way of deciding what to build to better demonstrate the project and by giving the idea of using a Iomega Zip Drive i really helped to push the project forward.

Week1 Narrative
First of all i had watched a lot of videos on youtube to refresh my knowledge about the difference between Bernoulli and Coanda Effect. Listed are the videos that i got the information from to work on the project. http://www.youtube.com/watch?v=AUyczZ3EiZg&feature=related

http://www.youtube.com/watch?v=mtIo6nWDXnU&feature=related

http://www.youtube.com/watch?v=z7K91H2-ZXA&feature=related

Then I had gotten the Iomega100 Bernoulli Box to demonstrate the Bernoulli Effect in it. After researching about the mechanism of the Bernoulli Effect work,i was able to present that in front of class. I explained how the difference in air pressure pulls the floppy disk towards the heads wit which it remained in contact while spinning. On the other hand, i worked on the Coanda Effect by using the model from our class to show the stickiness of water as it comes in contact with the spoon.













Week1 Peer Review
done comments on the user pages

Assign Task2
My assigned task 2 is to research more on hoe the mechanism of Iomega Zip Drive works. Document the data electronically. look for designing a separate prototype to demonstrate Coanda Effect

Compare actual work done to Task2
I worked on interpreting the difference between the explanations we had already given before. There were the misapplications that i was thinking as a Bernoulli Effect, but it was actually Coanda Effect. I used this link to get a better idea of differentiating the Benoulli and Coanda effect by using the static pressure example. The static pressure cannot be measured in the way most of my videos made of fans and hair dryer videos have in common. The static pressure in examples like hair dryer and blower does not explain the Bernoulli Effect because in that way the static pressure in stream jet stream is equal to the pressure in atmosphere regardless of streaming velocity of the jet.

Week2 Narrative
added the pictures of the experiments that i worked with in order to figure out the misconceptions about the effect of Bernoulli.











I bought the hair dryer from thrift store for four dollars to use in the demonstration with ping pong ball. Ping Pong balls were used from the engineering class to do the demo. First of all i worked with a hair dryer to pull the paper up with the difference of the air pressure. The worked with 2 hair dryers to pull the ping pong ball from one hair dryer to another. It worked pretty well and influenced other team members. Also i worked with one hair dryer and a ping pong ball to show the demo of Coanda Effect.

Week2 Peer Review
added the comments in the team discussion pages, also commented on the individual team pages of the team members. I suggested them to use some valuable videos and link and got some information from them how to interpret the differences between Bernoulli and Coanda Effect

Assign Task3
Do a demonstration of either Bernoulli or Coanda Effect to show the difference between Bernoulli and Coanda Effect

Compare actual work done to Task3
Comparing the interpretation about the wrong explanations about the BErnoulli Effect which was actually Coanda effect in this video http://www.youtube.com/watch?v=bNNfs2P5Gkc Using this video the ball was hung in the air because of the air stream. My misinterpretation was that the ball is placed at the edge of the moving air, the area underneath the ball has rapidly moving airstream and upside is the the quiescent adjacent air. So, the pressure in the air stream is lower, and the difference in air pressure keeps the ball levitating in the air.

So, my correct explanation with that demonstration in the video is that it is actually Coanda Effect not Bernoulli Effect. When the air pressure was released from the hair dryer some of the air air move past the ping pong ball and some of the air flows contour of the ball and leaves after travelling a significant amount of distance around the ball. In effect, the ball is pulling air around its surface.The reaction force comes in the direction of air stream and holds it in upward direction. I used the http://www.physics.umd.edu/deptinfo/facilities/lecdem/services/demos/demosf5/f5-09.htm from University of Maryland physics demonstrations to correct my explanations and helped a lot when i compared my video with it

Week3 Narrative
During this week i worked on researching the mechanism of working of Bernoulli Box. I have a Iomega 100 Box which is the decendant of Bernoulli Box. It came around in 1994 and had a storage of 20 to 25 Mbs. Using this http://www.freeopenbook.com/pc-hardware-nutshell-2/pchardnut2-CHP-7-SECT-1.html helped me understand how is the Bernoulli Effect applies to Iomega Drive. When the Bernoulli disk entered in the Box it spins at a relatively higher speed. Their is low pressure in the bottom of the disk and higher pressure on the top of the disk. Thus, the difference in the air pressure pull the disk towards the heads of the Bernoulli Box, and it remained in contact with the heads while spinning.

I also researched and worked on how the concept Of Bernoulli is used in the air flight. Using this http://www.videojug.com/interview/fun-science-demonstrations helped get a better idea of Bernoulli Effect during the flight. As the airplane is moving in the air their is difference in air in the bottom and top of the wing. The wings are especially designed so that it creates the mechanism of low pressure on the top and higher pressure in the bottom that gives it a lift during the take off and keep it moving in the air during the course of the flight. The demonstration shown in the video with a balloon and a helicopter wing. The balloon was filled with air pressure and the wing was placed on the top of the Balloon. As the low pressure air was released from the balloon it moved on the top of the blades of the wing and that caused it to move. At the end, when there was no air left in the balloon the gravity pulls it back down.

There was another demonstration that i researched which was also claimed as a Coanda Effect demonstration. Using this http://www.physics.umd.edu/deptinfo/facilities/lecdem/services/demos/demosf5/f5-03.htm explains the Coanda Effect that is not Bernoulli Effect. The metal sheets are blown and come together with the reaction force. According to the misinterpreted explanation as a Bernoulli Effect it was explained that their is faster airflow between the regions of the metal plates. Thus the difference between the low pressure inside of the plates and the higher pressure outside the plated bring together. On the other hand, the exact explanation from coanda effect says that air moves along the surface of the metal sheets leaving in a direstion away from th e center of two sheets. The reaction on the sheets causes it to move towards the center line of the two hanging sheets.

Week3 Peer Review
Comments added done

Assign Task4
Make a demo and differentiate the difference in Bernoulli Effect and Coanda Effect using different resources.

Compare actual work done to Task4
I found a lot of differences from the presentation that was done in the class. I was thinking about the effect of air blower with tissue paper was Bernoulli effect,but it was made clear as coanda effect.

Week4 Narrative
During the course of this week 4 worked on the demonstrations of Bernoulli and Coanda effect demonstrations. In this first I used an air blower and toilet paper to demonstrate coanda effect. Using this link http://www.youtube.com/watch?v=Q7psavgw98Q as shown in the demonstration the stickiness of the air keep the toilet paper floating in many different directions. It took me about less than a minute to finish the whole toilet roll. I was also working with the hair dryers and ping pong balls when i took this video http://www.youtube.com/watch?v=bNNfs2P5Gkc of my team members doing the demonstration. This demonstration shows the Coanda Effect as the pressure is exerted from the hair dryer to the ping pong ball. I also worked to finish the team page adding all the information on the amount of work done. I have also added the pictures I had taken while doing the demonstrations. I have started working on my new project by creating the wikiversity team page and user page.

Week4 Peer Review
comments added done

Complete Project Page
done

Start Next Project Week0 activities
I have done the team page and started on the model boat week 0