Cohesion and Adhesion in Space of H 2 O Team CASH 2 O : Donald Durgan, Afton-Dawn Johnson, Jennifer Meyer, Eric Lovejoy Advisors: Dr. Sean S. Kohles, Dr. Mark M. Weislogel
Jan 02, 2016
Cohesion and Adhesion in Space of H2O
Team CASH2O : Donald Durgan, Afton-Dawn Johnson, Jennifer Meyer, Eric Lovejoy
Advisors: Dr. Sean S. Kohles, Dr. Mark M. Weislogel
Reduced Gravity Flight Program
Submit microgravity experiment proposal.• Experiment must require microgravity environment.• Proposal must include an outreach plan.
If accepted submit Test Equipment Data Package (TEDP). Begin any scheduled outreach.
Head to Johnson Space Center and perform experiment aboard low-g aircraft.
PSU teams 2003 and 2004
2003 Mechanical Engineering (Team ALBERT)
2004 Off Planet Architecture Team
2004 Mechanical Engineering Team
Our ExperimentObjective is to study the ability of moving water droplets to adhere to surfaces of unique geometries.
Aimed for a velocity and drop size that would theoretically result in some rebounding and some adherence.
Looking for surface geometries that aid in adherence.
Requires microgravity so that effects during collisions from surface tension forces are not overwhelmed by gravity.
Apparatus
A
B
CD
E
F
A – LaptopB – Syringe PumpC – Lexan Polycarbonate PanelD – 80/20 Aluminum FrameE – AxleF – Video Camera
Flight Week
The Experience
• Dinner with NASA and Boeing
• Tour of Neutral Buoyancy Lab and Johnson Space Center
• Presentation by astronaut David Wolf
• Test Readiness Review
• Physiological Training and Hypobaric Chamber
Experimental EnvironmentFlight Description
• 2 hours • 30 Zero-g parabolas
plus one Lunar and
one Martian parabola• 15 - 25 seconds of
microgravity per parabola
Flight Trajectory
45 Nose Low
What Went Wrong?
The Problem
• In Normal Earth Gravity Pump Works
• In Flight, Pump Works
• During Parabolas, Pump Does Not Work
• Back on Earth, Pump Works
What Went Wrong?
The Fix
• Disconnect Keypad of Syringe Pump
• Hardwired a Switch to Syringe Pump
• Cut Hole in Lexan to Allow Manual Plunge of Syringe
Special ThanksNational Aeronautics and Space Administration, NASA
Oregon Space Grant Tyco Electronics
CECS Tap plastics
Dr Mark WeislogelDr Faryar Etesami Dr Sean S Kohles
Dr Derek Tretheway Molly Meyer Joni Heveron
Jake VanderhaarAaron Scates Our Parents