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.
Hi, I'm a physicist intern that has some problems with Optics simulations; I'm very interested in doing some Beam Propagation Method (BPM) simulation, but the information online is not that good for begginers in the area. Can anyone advise me on books, journals or such that might help me learn...
I have the following program that simulates a stochastic system of 400 particles. What I want to do now is separate the 200x200 grid into 2x2 smaller grids, out of which I will calculate each probability:
P_i= \frac{\sum_{\text{atoms}}}{4}
and from which in each step I'll be able to determine...
In a nutshell: is there any free software, which can take as input full description of a relatively large system (20-100 light atoms + photons), simulate its evolution over a period of time, and tell the probability of fusion over that time?
If there's no such thing available, how close could...
Hi, I have a silly question,
Could one, in theory make a accurate model of the life of our universe that one could look at from within. Let's say I put on my VR/AR goggles, 'there' Iam elevated from the earth, then I remain static, and the time begins to rewind. At some point I maybe hear...
Hi, I'm trying to study the quantum dynamics of a trapped ion phonon laser, the ion is explained by the master equation and hamiltonian given in this article, http://arxiv.org/pdf/1412.1863v2.pdf. I've been trying to use a Monte Carlo wave function approach but it seems to only describe...
I'd like an idea about simulation programs and how it can be applied to industries. Here is some of the simulation program ideas I happen to run across on Google. All the way from data calculations, 2D cell game to 3D crash proof simulations. I want to hear your thoughts and some of the most...
Hi! I have this code in C++ that simulates 2 body interacting through gravity using Runge-Kutta 4th order method. I plotted the trajectory of the 2 bodies and as you can see in the first picture they seems to be what I expect, 2 circles. But when I zoom in on one of them (second image) it looks...
Hey,
I'm trying to simulate an interferometric system for distance measurements, but I can't really find helpful software for that. Currently, I'm using OptiSystem 14, but it's really hard to do it since it doesn't contain some components like the mirrors.
So, I will be grateful if I get any...
So I made this simulation of charged particles: https://github.com/TheDemx27/Charge-Simulator
My goal is to be able to put the charges on a line, as I've done, and see them tend toward a final state where there is more charge at the ends of the line and less towards the center. The problem is...
My goal is to program a FDM simulation of a transformer. So, we have the coupled inductor model to start with ...
However, if L1 = 1, L2 = 9, and coupling is perfect then M = sqrt(1*9) = 3 and L1 - M = -2.
So, this seems problematical to me. Also, if I try to simulate this model using SPICE...
Hello Everyone, This is a PhD student in Chemical engineering from Australia. I am working on Simulation of many operations (hence my name is SimOpera) one of which is chromatography. Would like to further indulge in technical discussions ahead.
Currently working on simulation of hydrophobic...
If we are inside a computer simulation and we are self aware, do we have the potential to become Skynet? The algorithms that dictate the laws of physics are keeping us (the self aware being) in an isolated sandbox, the immensity of the universe is that firewall that keeps us from the outside...
Homework Statement
I was recently assigned an assignment where my instructor told us to come up with an idea for a numeric classical mechanics problem that is solved by computer methods. Some ideas the instructor gave was to simulate motion of a sun-earth-moon system or simulate the tides of a...
Homework Statement
This is an academic project related to a falling object simulation.
I have come to the point where I'm trying to calculate the per degree angle of the falling object seen in the attached images. The object has known height and length in pixels and is fixed on a pivot...
am trying to simulate air conditioner in open modelica and matlab.. is there any library like hvac so that i can do the simulation in mush easier way...
Hi all,
I have recently created an nbody simulation in Vpython for a few thousand particles where each particle is about 4000 times the mass of our Sun. Vpython is doing exactly what I want it to do the only problem being the output is extremely low quality (black spheres on a white...
I'm trying to write a simple script in blender python in order to show load deflection in cloth simulation. My question is: Is it possible to translate the change of length (distance between two nodes), into a force? (Newton between those nodes)?
In addition you will find a minimal example. The...
I came up with a (not yet) practical idea about how to detect if the universe is a simulation. Presumably, a finite information simulation cannot be independent of reference frame. We could for example detect floating-point round off errors if we accelerate something very close to the speed of...
Hi, so I built this circuit
I'm trying to run a parametric sweep of the voltage source. I'm running it from 0V to 30V with a 0.1V interval
So I put up the simulation settings that I wanted:
and I ended up getting this error:
I tried it on different computers as well and I still got the same...
Homework Statement
(a) Derive the relationship
between the output voltage V and the input current I; i.e. if V = kI
find k in terms of R1, R2 and Rf.
(b) Calculate the current I if Rf = 10 MΩ, R1 = 90 kΩ, R2 = 10 kΩ
and V –0.1 V.
(c) Model the circuit using PSPICE [using an ideal opamp]
and...
So when I use software like Unity3D and I click on the play button to run the simulation, is it updating the particle at every frame for the animation, let's say 60 frames per second, so it calculates the x and y position of where the particle should go within the time frame and show it.
Now if...
I am reading The Art Of Electronics, and I realize this is more of an encyclopedia rather than a textbook. I have referenced other sources as this has mainly served as a compass for me to learn about each subject area.
My question is fairly simple and straightforward. I'm using multisim to...
Hi! I am currently trying to write a code in C to simulate the orbit of planets around the Sun in the solar system.
I am using the velocity Verlet approach and finding that my code produces no acceleration in the ##y##-direction (aside from for ##t_n = 0##,) and that the planet just flies off...
Hi
I am interested in simulating the a cone structure in Silvaco's ATLAS TCAD.
Since its has a cylindrical symmetry, I should be able to define a simple triangle and rotate it about a side to form the cone.
I am not sure if this facility is available in Silvaco, like in Sentaurus from...
Hi,
I'm analyzing a composite leaf spring using ANSYS APDL, the leaf spring has a thickness of 12mm, and since it is a composite material, it is composed of many plies, I'm assuming the ply thickness to be 0.125mm. I imported the geometry as a Parasolid x_t. And the element type I used is...
Well I'm in grade 11 and for an investigation I decided I'd observe the behavior of protons once the neutrons and electrons are removed from the atom. Specifically I want to observe how the acceleration at which the protons move apart from each other varies with the mass of the atom (i.e. #...
Hello guys, I found this forum using google because I need help with simulating bungee jump model.
I've already done that with zero initial values and it looks good but I want it more realistic :
Let's say L is the length of rope so elasticity force starts acting when y=L so logically time...
Hi.
I'm writing a simulation of (an approximation of) the solar system. So far I've been able to translate the Wikipedia article on Kepler's laws to a function that uses a description of an elliptical orbit (eccentricity, periapsis, known position in time) to return a position when passed an...
Hi,
How can i make my Ltepsice simulation faster ?
it is taking me too much time (three days and it is not complete)
the Defi diodes are supposed to hold up to 4 kv
Good day.
I do not know much about cosmology, rather computer science, but the following theoretical question bothers me a little. Some scientists, like Tegmark, Wolfram, Zuse or Fredkin, support the idea that the Universe might be just computation. Computable means that something can be...
I know planets are very stable and don't explode, but here's something I would love a physicist to run on a powerful computer, maybe using some FEM model. Let's say we will the inner core of planet Earth with TNT, say a sphere with radius 2000 km and ignite it. What would the explosion look like...
Hi,
im looking to simulate Bandgap diagram of an heterojunction of AlGaAs/ GaAs with metal schottky contacts.
can anyone please recommend me of a program that can perform this task?
i'll be glad to know.
thanks
Hi,
I'm trying to simulate a fault current limiter at ansoft maxwell 14 and i have a problem when i put the stranded option on winding, the current that appears is always positive, with the axis above zero. Anyone can answer me what's happening and how can i fix this?
Some date:
Transient...
Hi,
as I am in need of Low- and Highpass filters i would like to simulate my circuit using LT-Spice.
I hope that i can get optimal caps and coils values like that.
So i simply started to build my pi-network lowpass filter in LT-Spice and got the simulation results (please check the picture in...
hi
im supposed to simulate a vcsel laser for my thesis
i got problem in selecting physics.. i should check its heat transfer and threshold current but i don't know which physics should i choose ! does anyone know about vcsel's physical structure in Comsol ?
by the way does anyone know that how...
Hi all
I am running a NVT simulation for some structure and want to draw the phase diagram for T vs V.
In my code I set some special value for temperature and also for volume. Also I have the analytic formula for my interaction potential.
But I don't know how I can draw the binodal line for...
I am modelling a 1D fluid wave propagation problem and I needed to know how I can check that my results are energy conservative. please reply, urgent. thank you.
Homework Statement
I am running CASTEP DFT software to simulate pristine graphene, and am unsuccessful in obtaining the trademark zero band gap at the k-point as reported in numerous papers to date.
Any assistance would be greatly appreciated as the subject is very new but I am keen to push...
Dear all,
I am simulation a lossy transmission line like this:
http://www.ece.uci.edu/docs/hspice/hspice_2001_2-2878.jpg
with G having zero conductance (open). So it is a standard lossy transmission line with RLC components. All R, L, and C values are the same, so there is no variation from...
Hi all,
In this paper they mention that the "experiments" were done using "quantum simulation". Expressions like the following are used:
"Here we experimentally simulate the nonlinear behaviour of a qubit..."
"Modern experimental quantum simulation allows one to ask meaningful questions that...
Hello
For the past 6 years I have been working (on and off) on a vehicle brake system simulation tool. It takes a lot of inputs about the car and the brake components, along with a rate of maximum lateral acceleration which is used to determine the amount of grip available.
The model then...
Dear All,
i am new to Maxwell 3D software. i want to simulate my Wireless Power transmission Project in Maxwell, for this purpose i took help from different toturials whic abled me to draw the Tx and RX coils...i want to simulate these coils to calculate the values of L, M, K and etc. but i am...
Hello,
In this simulation (link is below) the graph of the potential energy with respect to position U(x) when there is no friction on the ramp looks like the graph of potential energy of Hooke's Law spring U(x)=(1/2)KX^2). For the spring, the negative of the derivative is equal to the...
I'm not good at English. I'm a undergraduate student.
I'm interested in this research.
I'm interested the simulation part but I don't know how to start.
Please guiding me how to simulate method or program did they use on paper.
" A Theoretical Study on Van Der Pauw Measurement Values
of...
Is it possible to predict the damping coefficient of a string using a mathematical simulation that included the string's diameter, length, frequency (and therefore tension), material density, and elastic modulus (if not also its Poisson's ratio) as opposed to simply looking at the amplitudes of...
Hi all
I have few questions in bldc motor simulation in maxwell 2d:
- I need help in loss calculation,I exported a bldc motor in rmxprt to maxwell 2d after entering core properties and w/kg data in 50hz,in 2d checked stator and rotor in set core loss and checked (consider core loss effect on...
Homework Statement
Let said I have found out the ripple output voltage for a given circuit using a simulation software and it gives me 10V + and then when I do the actual experiment , I got about 7.8V for my output ripple voltage.
With a difference of more than 20% , does the reading i get...
Hi,
I have a strange problem with Pspice, it always shows after successful attempts, the simulation program stops working and all voltages markers turns to gray and can't see any results any more
Hi everyone,
I want to build a car-model which should be good enough to study under-steer/over-steer and test various safety algorithms like ABS, TCS, ESP. Initially I made a quarter car model, here I could implement simple ABS,TCS. Quarter car model supports only longitudinal dynamics and is...