What is Simulation: Definition and 879 Discussions

A simulation is the imitation of the operation of a real-world process or system over time. Simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process, whereas the simulation represents the evolution of the model over time. Often, computers are used to execute the simulation.
Simulation is used in many contexts, such as simulation of technology for performance tuning or optimizing, safety engineering, testing, training, education, and video games. Simulation is also used with scientific modelling of natural systems or human systems to gain insight into their functioning, as in economics. Simulation can be used to show the eventual real effects of alternative conditions and courses of action. Simulation is also used when the real system cannot be engaged, because it may not be accessible, or it may be dangerous or unacceptable to engage, or it is being designed but not yet built, or it may simply not exist.Key issues in modeling and simulation include the acquisition of valid sources of information about the relevant selection of key characteristics and behaviors used to build the model, the use of simplifying approximations and assumptions within the model, and fidelity and validity of the simulation outcomes. Procedures and protocols for model verification and validation are an ongoing field of academic study, refinement, research and development in simulations technology or practice, particularly in the work of computer simulation.

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  1. T

    Those moving near speed of light simulation videos

    Those "moving near speed of light simulation" videos Lowly undergrad here. Have you people seen these relativity simulation videos? http://youtu.be/bYdohPiFF6Y for example. My question is, what causes this spherical distortion effect? I know about length contraction and time dilation, but...
  2. P

    Simulation Programming: Spawning particles at random position

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  3. N

    Direct Simulation Monte Carlo(DSMC) corner boundary problem

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  4. P

    MD simulation of amyloid beta dimer using GROMACS

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  5. M

    What are some tips for improving accuracy in shallow water flow simulations?

    I'm trying to create a simulation of shallow water flow and I keep getting huge values of variables. Does anyone here have experience with this type of computer simulations?
  6. F

    Simulation of beta-binomial distribution

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  7. S

    Engineering Is the Simulation Accurate? Analyzing an Op Amp Circuit with Multisim

    hi everyone , i solved a textbook question which says : http://img268.imageshack.us/img268/8994/img1379sa.jpg http://img685.imageshack.us/img685/3228/img1380z.jpg and found analytically : ia = -470 uA, ib = 770 uA , ic = 22 uA, ig= 322 uA, is = 64.5 uA Ra= 1kohms, Rb=2kohms, Rc...
  8. S

    Torsion Test Simulation: Understanding Von Mises Criteria and Its Approximations

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  9. R

    Runge-Kutta for gravitational N-Body simulation - prediction of acceleration

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  10. A

    Exploring the Basics of Numerical Simulations for Modeling GRBs

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  11. T

    Theoretical, Experimental, Simulation, and end of story?

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  12. S

    Simulink Simulation of Inverted Pendulum: Help Needed

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  13. M

    General/complete physics simulation software?

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  14. J

    Help with simulation in ANSYS Maxwell, 3D electromagnetism simulator

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  15. S

    Is the wilson loop always positive in the lattice simulation?

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  16. S

    Is the wilson plaue always positive in the lattice simulation?

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  17. MathWarrior

    Programs Scientific Computing / Simulation and Modeling Degrees?

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  18. A

    Really Simple PSPICE simulation, need somebody to double check me

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  19. K

    (Electric) Circuit simulation software for blood flow model

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  20. C

    Engineering Computer Engineer going into Simulation and Modelling

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  21. T

    Silvaco IC simulation with Athena Atlas

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  22. N

    Ask about simulation using pspice

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  23. F

    Magnetic Pendulum Mathematica Simulation

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  24. C

    Need bending machine simulation software and where to start to make it?

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  25. S

    Simulation, distribution, statistics.

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  26. B

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  27. N

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  28. E

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  29. E

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  30. J

    Simple circuit simulation applet

    http://www.falstad.com/circuit/
  31. D

    Simulating Heat Diffusion from Laser Beam on Sample

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  32. Y

    Any free simulation programs for transistors, FET and diode circuits?

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  33. P

    Why is my circuit simulation software not working properly?

    Hello I need to do some simulations before trying to make a real circuit. I was advised to use the free software by Linear Technology. However, it works bad. I have a circuit with a couple of operational amplifiers(op-amp). According to the first golden rule, an op-amp should keep equal...
  34. B

    How do you use a probability function in a simulation

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  35. B

    Thermal Simulation Software (Flixo vs Therm)

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  36. A

    Is Computer Crash Simulation Post A Virus?

    i haven't clicked on it. better safe than sorry.:smile: if it is somebody ought to remove it. Have A Nice Day!
  37. H

    Correct usage of Calculation, Computation and Simulation

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  38. V

    Newbie to the Forum with Professional Physics Simulation Background

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  39. N

    Thermal Storage Simulation in TRNSYS Software

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  40. ShayanJ

    Simulating Magnetic/Electric Fields: Is It Possible?

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  41. L

    What is the formula for calculating the VE value in car physics for simulation?

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  42. R

    Exchange coupling constant in micromagnetic simulation

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  43. B

    Problem understanding NBody simulation physics

    Hello everyone! :) This is my first post in this forum! :) I am a computer programmer but the last weeks I am trying to combine my field with astronomy and astrophysics. I decided to create my own nBody simulator but I have problems understanding the calculation of the velocity and speed...
  44. R

    N-body simulation- objects accelerate *past* each other

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  45. R

    Ideas for circuit simulation project?

    In school we have to make a theoretical circuit using a simulator, in our case its CircuitWizard2. For this project we need to think up a problem and then create a virtual circuit that solves this problem. Throughout we have to show our calculations, testing and development of ideas. We...
  46. M

    Maxwell 3D eddy current simulation for a cylindrical wire

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  47. W

    Physics Computer Simulation: Optimum Angle for Drag Projectile

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  48. S

    Engineering CMOS inverter circuit, spike in simulation

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  49. R

    Simulation of hydraulic system in any software

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  50. R

    Fluid simulation for computer graphics

    Can someone explain to me how fluids are simulated using particles? What equations to solve? How to update the particle positions? How awfully computer intensive is the algorithm? Can a simulation using a 100 * 100 * 10 grid run okay on the average computer? The more I read the more I realize...
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