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  1. 1. A l a n Z h a n g a n d K e v a n H o l l e b a c h è Computer Simulation and Modelling Simulation of a tokomak reactor (Device that uses magnetic fields to confine plasma into a donut shape)
  2. 2. Description• Process of designing model that reflects real system Formula 1 aerodynamics• Conducting experiments on models for understanding behaviour of real world• First large-scale use was to model nuclear detonation during WWII Model of a satellite tobacco mosaic virus that involves a massive amount of computing time
  3. 3. Process Aerodynamics of an airplane propellor Osmosis1. Define problem or experiment2. Collect data to determine probability distributions3. Develop and test model4.Validate that model functions by using historical data5. Run simulation under set conditions6. Record and implement results Aerodynamics of a frisbee
  4. 4. Other Info Input data can vary fromA few numbers (eg. simulation of waveform of electricity on wires to a few terabytes of information (weather modelling) Difficulties sensitivity and accuracy: with so much potential calculations, input data must be precise Advantages: -Gives estimate of system performance -Allows activity to be studied in accelerated time Heat transfer in a pump -Can study multiple aspects at a specific time -Run scenarios under controlled conditions
  5. 5. Applications Weather simulation• Economics • stock markets, • economic stability Airflow around a falling parachute and a hovering jet • business management • Chemistry• Engineering • chemical reactions • oil reservoirs • interaction of particles • Physics • traffic simulation • Biology • noise barriers • weather forcasting • ecosystem balance • fluid dynamics • vehicle safety • genetic mutations • quantum mechanics
  6. 6. The Future
  7. 7. Virtual Reality• Computer simulation that simulates aspects of the real world• As processing power increases, so does authenticity of virtual realities• Computer visuals have pixels, virtual realities have limited quality compared to real world• Physicists have recently found that the world is made of finite matter little particles that they even call pixels• Means the universe can be very accurately simulated
  8. 8. You’re Living in a Computer Simulation• Ancient Chinese philosopher Zhuangzi noticed that his dreams of being something other than human were indistinguishable from his experiences being himself• Nick Bostrom had an idea that we are living in a computer • Theoretically, it is possible to suspend one’s brain in “life”- sustaining liquids and connect its neurons by wires to a computer. simulation assuming that: • A society like ours can eventually have the capability of • Wires provide electrical impulses identical to those the brain normally receives creating a computer simulation indistinguishable from reality • Such a society would repeat the process • Since all interactions would be the same as in a skull, no way of telling if brain is in vat or skull • After time, societies within the simulations will eventually be able to create their own simulationsOdds are we are in a simulation
  9. 9. Time Travel• Possible theory to time travel• Prof. Frank Tipler proposes using computer simulation, as physics doesn’t allow for easy time travel• Since processing power of computers increase exponentially, in the future we may have infinite/near infinite processing power• Using this, we can create simulations that simulate our own progress• With Virtual Reality, we can experience the simulation• Because simulations can be accelerated or slowed, we can “travel” to either the future or the past
  10. 10. The Meaning of Life ?? Possible Simulation Theory
  11. 11. Bibliography mputational_fluid_dynamics_cfd.html