156A Finals Week

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

- Testing the accuracy of cough simulator by determining spray droplet size. Next quarter we will measure droplet velocity.

Accomplishments from Previous Week

Goals for Next Week (list names after each item). Use specific and measurable objectives.

- Test spray gun with a different nozzle
- Test with different input pressure
- Measure velocity of spray gun (without solvent)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

- In person
  - Continue with cough simulator approach (3/19): We will change the nozzle and input pressure to get more accurate droplet sizes
  - To address evaporation, place damp paper towel in Tupperware to transport droplets (3/19): We do this for the next test and use oil on the surface to suspend the water droplets

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

- In person
  - Will a short spray be enough to pick up a pattern (3/13)? The test showed that a 1-2 second spray was long enough for the droplets to land on the surface at a distance of 2 ft away.
  - Will the pathogen die (3/13)? We will test the spray droplet velocity to determine the amount of force the droplets feel once they hit the surface.

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

Risks and Areas of Concern

Resources or Information Required but not Available

- How to cost-effectively change nozzles (e.g. do we have to buy a new spray gun if we buy a new nozzle?)

Schedule

Budget (list amount spent and amount remaining)

Progress on Report and Webpage

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