1. What Is Simulation? Modeling:
Modeling is the process of representing a model which include its construction and working
Simulation:
Simulation of a system is the operation of a model in terms of time and space , which helps to analyze the performance of existing system or a proposed system.

2. Definition
“Simulation is the process of designing a model of a real system and conducting experiments with this model for the purpose of either understanding the behavior of the system and/or evaluating various strategies for the operation of the system.”

14. Process of building a computer model and then interplay between experiment ,simulation and theory

15. Application of computer simulation
CPU and memory simulation
Cache memory simulation
Game design and animation
Analysis of air pollutant
Design of complex system such as aircraft and logistic
Flight simulator
Weather forecasting
Simulation of electrical circuit
Forecasting prices of financial market
Design of industrial process
Reservoir simulator
Robot simulator
Traffic engineering
Complex digital system design
Modeling car crashes to test safety mechanism in new vehicle model

16. Top list of Simulation software
Simio: rapidly build accurate 3D animated models and objectively analyze alternatives to make informed fast decisions.
CAEplex: An easy web-based platform for performing finite-element analysis running on the cloud.
UberCloud: Cloud platform that helps engineers to use their favorite simulation software on powerful cloud hardware.
FMI Toolbox FMI Toolbox for MATLAB®/Simulink enables easy to use integration of physical models developed in MATLAB and Simulink environments.
SketchUp Pro:2D and 3D drafting application for visualizing, communicating, and planning future construction projects.
ASCEND - open-source equation-based modelling environment
ns-3 - an open-source network simulator
CircuitLogix - an electronics simulation software developed by Logic Design Inc.
Enterprise Architect - a tool for simulation of UML behavioral modeling, coupled with Win32 user interface interaction.
MATLAB - a programming, modeling and simulation tool developed by MathWork
Mathematica - a computational software program based on symbolic mathematics, developed
RoboLogix - robotics simulation software developed by Logic Design Inc.
Simulink - a tool for block diagrams, electrical mechanical systems and machines from MathWorks. `

17. Simulation software for mobile app design
Sketch is a lightweight MacBook based UI/UX design tool for modern app designers. Sketch is more like Adobe Photoshop but it’s built mainly for app prototyping and has one of the highest share in the wireframe and prototyping space.
Axure RP is a complete app design tool for professional designers. It tries to give you all the functionalities you need to design your app from start to finish.
Origami is a standalone interface design tool developed by Facebook engineers and has been used by Facebook to design Facebook apps like Facebook Messenger and Instagram and now it’s available for you for free. It’s a complex tool with great functionalities.
OmniGraffle is a diagram design tool that provides the features and freedom to prototype screen flows, strategy maps, wireframes, and a variety of diagrams.
FramerJS is a flexible and interactive mobile app design tool that allows you to code or use their visual editing tool that auto-generates the corresponding code at the backend, which you can re-use if you like to meddle with code. Otherwise, the visual editor should be fine if you’re just a visual designer.

18. Simulation software Simulation Language
MATLAB
ROBOLOGIX
DX STUDIO
ARENA
NS3
SIMULATION PLUS
GEM5
multi2sim C
C++
Java
Python