We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byKennedy Brasier
Modified over 2 years ago
The conquest of Weightlessness Collection of Presentations Danail Obreschkow, Feb. 2006
Feel Weightlessness & Gravity Insight in 0g-Research GOALS
1 Weightlessness 2 Cavitation 3 Sensations 4 Results 5 Next Step 6 Beyond
Weightlessness and Free Fall 1
Weightlessness = Free Fall Weightlessness = Free Fall ≠ Zero Gravity Inertial force Gravitational force Gravitational force Inertial force Net Force Weightlessness = Free Fall = Zero Gravity Gravitational force Gravitational force No net Force
Free Fall Trajectories
Free Fall Technologies Drop Tower 5 seconds Parabolic Flight 25 seconds Sounding Rocket 12 minutes Space Ship weeks
Who ? etc.
Why ? BiologyFluid dynamics Medicine & Psychology Physics & Chemistry
About Cavitation 2
Phenomenon of Cavitation Tiger Pistol Shrimp: Shockwave kills small fish in 2 meters distance !
Cavitation in Technology Damage Concerned Technologies Questions: Last Stage of Cavity Collapse ? Interactions with Surfaces ?
Last Stage of Collapse Shock WaveMicrojetSonoluminescence”Cold” Fusion Supersonic 10-100 GPa Subsonic-sonic Sharp Point-like 10 4 -10 6 K Erosion Vibration Efficiency loss ???
Interaction with Free Surface
Experimental Access Problems: Water volume never isolated Free surfaces always flat + – Electrical discharge Laser
Goal Confined shockwave Observe all liquid jets Interaction with spherical free surface Water Drop Cavitation Bubble NB: Drawn before the experiment !
Drop Formation & Fixation
Here we go !
Sensation of Weightlessness 3
Flight Maneuver 31 parabolas per flight inside a military flight zone
Phenomenology Initial stomach lift No up, no down Feather weight – Stone mass
Below and above
Above and below
Medical aspects Scopolamin Promethazin
Real Motion 10 mm
Slow Motion 10 mm
Ultra Slow Motion 10 mm
Drop Formation 1/e damp out time = 0.7s Negligible interaction Repulsion by electrodes Attraction by electrodes
Stability of Drop and Free Surface
Bubble Size Evolution Model Experiment Validation Prediction
Counterjet Geometry Planar free surface (ground experiment) Spherical free surface (microgravity experiment) bubble [Robinson et al. 01] Free Surface High pressure Numerical Simulation
Shockwave-Nuclei Interaction 0.0ms0.08ms0.16ms Shockwave Energy New channel for erosion
Jet-pair Instabilities Counterjet Geometry Bubble Collapse Shock Wave Unexpected Hair-jets
Next Step 5
Catch the Shock Wave !
Dilemma of Choice
Symbol of Political Power
Ozone Hole Sep 18, 1979Sep 17, 2001
UESCO World Heritage Site Iguaçu 19732001
Water Drops and Cavitation Bubbles in Microgravity 56th International Astronautical Congress 17th October 2005, Fukuoka, Japan D. Obreschkow, P. Kobel,
Cavitation Bubbles and Shockwaves in Microgravity 57th International Astronautical Congress 2006, Valencia, Spain D. Obreschkow, P. Kobel, N. Dorsaz, A.
Gravity and Free Fall Felix Baumgartner's supersonic freefall.
Ch 13 Gravitational Interactions
Chapter 2: Properties of Fluids
Gravity and Free Fall.
EXAM I is coming up in two weeks! Multi-choice (scantron!) type of exam Some examples of possible questions will be available via the Exam link on our.
Gravity and Air Resistance Chapter 3 Section 7-9.
Universal Gravitation Gravity is the way in which masses communicate with each other.
Physics 1B03summer-Lecture 10 Today’s Lecture… … will start at 10:30am (and end at regular time)
GRAVITY Chapter 3 Section 2.
13.1 – The Falling Apple Newton realized all accelerations are caused by net forces The apple accel to earth in the same way the moon accel to earth The.
Brookhaven Science Associates U.S. Department of Energy Neutrino Factory / Muon Collider Collaboration Meeting March 17-19, 2008, FNAL, Batavia, IL Target.
Unit 06 “ Circular Motion, Gravitation and Black Holes” Gravity in our Solar System.
Extragalactic Astronomy & Cosmology Lecture GR Jane Turner Joint Center for Astrophysics UMBC & NASA/GSFC 2003 Spring  Physics 316.
Cavitation and Bubble Dynamics
Force, Momentum and Energy. Newton’s Laws of Motion Our understanding of how an object reacts to force, or how the motion of an object is affected by.
What’s the difference? MASS AND WEIGHT. MASS The quantity of matter in an object Always constant Can never be zero Measured with a balance Unit: grams.
Newton’s Second Law of Motion. Newton’s Second Law Newton’s Second Law of Motion- Acceleration depends on the objects mass and the net force acting on.
Gravitational Interactions. Newton Again Sir Isaac Newton did not discover gravity. – He discovered that gravity is universal – All matter attracts all.
3 3 What is gravity? _______ is an attractive force between any two objects that depends on the _______of the objects and the ________ between them.
Chapter 2: Force and Newton’s Laws
Chapter 3 Study guide.
Integration Relation for Control Volume
Chapter 10-2 Friction and Gravity. Friction Force of Friction – caused by two surfaces rubbing Strength: depends on 1) how hard the surfaces are pushed.
Introduction to Cavitation
Objectives Solve orbital motion problems. Relate weightlessness to objects in free fall. Describe gravitational fields. Compare views on gravitation.
Chapter 3 Forces. Section 3.1: Newton’s 2 nd Law 2 nd Law of Motion: describes how force, mass, and acceleration are related Formula: force = mass x.
A car accelerates from rest to 20m/s in 5 seconds and then maintains that speed for 6 seconds. How far did the car travel in that time? A rocket accelerates.
Four Forces of Flight Rocket Project Day 1. Aerodynamic Forces Act on a rocket as it flies through the air Lift & Drag Lift Force – Acts perpendicular.
FLUID FLOW FOR CHEMICAL ENGINEERING Dr Mohd Azmier Ahmad Tel: +60 (4) EKC 212 CHAPTER 8 (Part 5) TRANSPORTATION SYSTEM.
Forces and Motion Falling Water Activity 1. What differences did you observe in the behavior of the water during the two trials? 2. In trial 2, how fast.
Uniform Circular Motion and Gravity
Gravity 1.Gravity requires air/atmosphere. 2.The strength of a gravitational force depends on the mass of objects. 3.ALL objects in the Universe attract.
Newton’s Laws of Motion Dynamics After studying Kinematics, we know how to describe motion in two and three dimensions. But what causes this motion?
Chapter 4 – Gravity, Projectiles, Satellites
CHAPTER 6 MOTION IN 2 DIMENSIONS.
Free Fall The acceleration of gravity (g) for objects in free fall at the earth's surface is 9.8 m/s2. Galileo found that all things fall at the same rate.
Circular motion and Gravitation Chapter 6 1Physics Chapter 6.
Gravitation Standard 9. Gravitation Is the force pull objects towards the ground is the same that keeps the moon moving around the earth?
Gravity and Microgravity
QOD#48 What does each line represent? A – B – C – D – Time Distance Acceleration (speeding up) A B C D deceleration (slowing down) Stopped – no motion.
Chapter 6 Forces In Motion
Gravitational Force Gravity= a force of attraction between objects, “pulls” objects toward each other Law of universal gravitation= all objects in.
FLUID MECHANICS AND MACHINERY INTRODUCTION Density Density is given by: = mVmV The symbol for density is “rho.” Density is simply mass per unit volume.
KinematicsRotationEnergyWaves Electricity Dynamics.
DYNAMICS 1. Newton’s Three Laws Newton’s First Law Newton’s Second Law
© 2017 SlidePlayer.com Inc. All rights reserved.