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. L

    Vickers Hardness testing simulation on ANSYS

    I have tried to simulate the Vickers hardness on a substrate with a coating on it. I am really struggling to get it to work as the deformation is far too big. I have added the pictures of my model. Is there anyone that can help me with this?
  2. leo92ra

    Simulation with COMSOL - uniform pressure

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  3. S

    I What is the propagation speed of a diffusion

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  4. scott ketter

    What is the final velocity of a ball rolling through a tube?

    I am making a physics simulator and this problem is tricky. You have two freely moving objects with known masses and velocities in a frictionless environment. The first object is a ball and the second is a pipe. They are moving toward each other. I need to know what formulas are used to simulate...
  5. rumborak

    Detailed simulation or SlowMo of elastic collision?

    I was thinking about Newton's Cradle the other day, and I wondered how those collisions actually look like in detail. Which then got me thinking that my understanding of even a basic elastic collision of two macroscopic objects is weak to say the least. Simplified, the two objects could be two...
  6. D

    MATLAB General Relativity Package for Friedman Eqns: MATLAB, Mathematica

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  7. J

    Ansys Workbench Fracture and Cracking Behavior using Solid65

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  8. I

    Dynamic contact angle simulation in COMSOL

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  9. S

    I Restricted three body problem (numerical simulation of gravitational attraction)

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  10. nothing909

    Instrumentation amplifier practical results vs simulation

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  11. tony873004

    B Simulation: Our Solar System's Hyperbolic Residents

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  12. E

    Molecular Dynamics Simulation - How Do You Find Parameters?

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  13. T

    I Is simulation considered a type of quantitative analysis?

    Hello, I've been asked to talk about a time where I have used quantitative analysis. I once used simulation of the solar system to find out more about things like close approaches, and Gladmans criteria I was wondering if simulation is considered a quantitative method of analysis and if the...
  14. N

    The Simulation Interpretation of Quantum Mechanics

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  15. R

    Force equivalency in a physical simulation

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  16. G

    Fortran Simulating Contact Force in a Moving Dashpot System Using FORTRAN

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  17. A

    Modeling analytical solution of 1D heat equation

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  18. W

    Mathematical Simulation of Patent. Very General

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  19. Buzz Bloom

    I Dark Matter Simulation in Today's APOD

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  20. J

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  21. F

    CFD Fluent airflow simulation -- "Error: no periodic zones adjacent to grid interface"

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  22. whatphysics

    Ansys Maxwell simulation taking too long

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  23. G

    Engineering Simulation of Circuits Without Kirchhoff's Laws?

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  24. P

    On why the safest form of AI is a simulation of the brain

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  25. S

    Creating a Wind Tunnel Simulation: Where to Begin?

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  26. FallenApple

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  27. T

    Performing Metropolis-Hastings algorithm for a Poisson Distribution

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  28. H

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  29. G

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  30. S

    How Does Heat Transfer Into a Sphere Over Time?

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  31. M

    C/C++ Velocity Verlet C++ implementation

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  32. V

    I Hyperbolic space simulation in VR

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  33. R

    A Computer simulation of neutrino physics research

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  34. M

    I Solar system simulation -- Significant deviation of some Jovian moons

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  35. M

    I Solar system simulation errors

    Hi, as a side project I am making a solar system simulator in Python, but I am getting extreme inaccuracies. As the image shows - I am comparing the simulation to data obtained from NASA's Horizon. I have written a a basic Verlet integrator in the Python class posten below: import numpy as...
  36. M

    Spring Simulation: Visualize and Analyze Moving Systems

    How can I simulate this spring system and see how they move and behave? Thank you.
  37. P

    Logisim question -- Simulation of a small logic circuit is not working

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  38. C

    Buckling Simulation: Questions & Answers

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  39. F

    Monte Carlo Simulation, Ising model in 2D

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  40. A

    Solve MCNP6 Simulation Issue: 10 Particles Lost

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  41. S

    What is with this projectile simulation?

    Homework Statement I need to do a project based around this simulation (https://phet.colorado.edu/en/simulation/projectile-motion). I was playing around with it and am confused with how it even works. It seems to work fine with the exclusion of air resistance, but it seems off with it...
  42. chinmay

    Simulation of Dynamic Charateristics

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  43. Bharat

    ANSYS MAXWELL SIMPLORER Solution Error

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  44. Q

    Physics Simulation and model science or quantum computing

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  45. X

    N-body simulation - straight line orbits

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  46. J

    B The perfect relativistic quantum particles simulation

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  47. M

    I Boundary Regions in LAMMPS MD Simulation

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  48. T

    Solid State Book focusing on numerical simulation of quantum systems

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  49. J

    B Math Help for Advanced Simulation of Twin Paradox

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  50. B

    AC current / circuit simulation software

    I'm looking for software that can simulate an ac circuit. After a quick google, I found several free online services (which I will try out). What I was wondering though is if anyone had some advice concerning my selection. A brief list of requirements: accurate simulation of different conductor...
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