Simulation Definition and 899 Threads

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...

I'm working on a computer graphics program that simulates the motion of two point masses as indicated in this diagram: After applying the laws of conservation of momentum and the conservation of energy I am left with the following equation to solve for e': Does anyone have any idea how to...

Hi, I have read this paper “Dynamic equations of motion for a 3-bar tensegrity based mobile robot” (1) and this one “Dynamic Simulation of Six-strut Tensegrity Robot Rolling”. 1) http://digital.csic.es/bitstream/10261/30336/1/Dynamic%20equations.pdf I am trying to implement a tensegrity...

If digital physics is true and physical reality consists of computations, then what could possibly be the computational platform, i.e. where could the computations be run on? What are possible answers explored in digital physics?

Hey, is there software out there capable of simulating heavy nuclei? For instance, U235 or other fissile materials? When I say simulating, I mean using all the appropriate equations (nuclear strong force fields represented, Schrodinger equations represented, etc). Mainly, I would want one that...

Hi there! I am currently building a simulation to model the propagation of radio waves in seawater in terms of its propagation loss. I have previously discussed the models I've looked at but have settled on a model which depends primarily on the propagation distance ##r##, the carrier wave...

i think this question is very important. We must know Vds to make MOSFETs in saturation region. if not, there would always be possibilities that a transistor falls in a linear region as Vds is lower than Vdsat. Of course, i can calculate Vds in a CS AMP with a drain resistor. I mean, in the...

Hello guys! I am learning a bit on queue theory in one of my courses, and decided to try and do some simulations even though it is not mandatory. (Curriculum only covers the steady state, where it can be treated mathematically with ease). Im looking at a birth-death process, where the time til...

I have TINA software and created a circuit "Dancing Light" but the circuit is not even working. Can anyone help me with this.?

Hello everyone! I’m using APDL to simulate the behavior of a specimen in tension with a sandwich structure made of honeycomb and glass fiber. It was modeled in CATIA V5 and exported to APDL in a parasolid file. Only a half of the structure has been modeled because of symmetry condition. NOTE...

Hi everybody i want to simulate, low frequency ferrite core receiving antenna . but i can't find a good and complete software or method to do this. what is your suggestion or experience? thanks for your attention.

I was wondering if anyone has any knowledge of any work that has been done, to use machine learning methods to try to learn parameters good for a physics simulation. Or if anyone has any insight about how this can be done.

I am working on a simulation but i want to put a constraint that my shaft rotates clockwise only, If a force is applied on anti clock wise direction, it doesn't go back. Working on MSC adams software. Thank you in advance for any kind of advice anyone can help with.

The question of neutronics or reactor physics methods has come up at various times and with respect to different aspects. I thought it would be worthwhile to explore various methods, the technology and their applications. Broadly, reactor physics calculations involve solving equations related...

Homework Statement Hey, so basically I'm doing Advanced Higher Computing Science at school (It's a Scottish qualification), and I need to build an orbital simulator in VB.Net 2008 (nothing too fancy), but I'm having issues planning it all out. I'm only going to have one planet orbiting a star...

So I'm trying to run some 3D transient simulations based on magnetic field focusing/shielding, but I'm not getting the expected results. Does anyone know if Ansoft Maxwell 14.0 will solve for the magnetic fields created due to the eddy currents? It doesn't appear to.

Pluto, Charon, Hydra, Nix, Kerberos and Styx rapidly grow larger as New Horizons approaches, and then passes through the system. It then proceeds to pass through the umbra shadows of both Pluto and Charon so scientists can study their atmospheres. In this simulation, you can control the speed...

Good morning, I was wondering if you could help me solve a problem with a poroelastic model with COMSOL Multiphysics. It is a very simple model preliminary to my real study to understand the role of Poisson's ratio on the simulation, keeping all other parameters constant. The model is a...

Homework Statement The problem is to model a permanent magnet with a torus core .I just wanted to know how to attach attribute of magnet to a volume in ansys 15.0. I solved the problem in 2D but in 3D the results are not satisfactory and I'm not able to point out the mistake by me. the...

I''m facing problem in modelling and analyzing a permanent magnet in 3D. kindly help me out.

I've been running some of my own simulations of a variation on a standard map using Verlet integration on Mathematica, and I would like to start generating maps of phase space using ~25,000 initial points. I'm currently at 1000 points using Mathematica, and each simulation takes about 15 minutes...

Hello! I have been trying to make a simulation and it doesn't quite work right, don't exactly know why. I have two questions! 1. Acceleration I have been trying I need a formula that uses. frames till full speed (f) (if framerate is 60fps and this value is 60 then player is at full speed...

Hi all, I have this dynamic: is a Mean Reverting process. I want to simulate the sde with MATLAB but I am a beginner and I have some problems. I show you the code that I have created: %% Simulazione prezzo Geometric Ornstein-Ulenbeck clear all clc %Parameters mu = 0.5; sigma = 0.12; eta =...

Hey Guys! Hi Guys! Well I am new here and I have to confess that I somehow got stuck in a 3D transient electromagnetic simulation of a solenoid actuator and… I’m a mechanical engineer^^ So I would appreciate some help of you guys! 1. I imported the geometry from CAD-files. But I remodeled...

Hi all. I'd like to use a software package, that has been designed for collisionless dynamics, to investigate general globular clusters. As they are highly collisional, at least in their inner parts, this perhaps makes no sense. However, it may be meaningful for some time- or length-scales or...

In the quest of searching what are the basic ingredients of quantum theory that provide exponential speed-up to some quantum algorithms, a basic question that is pursued in the literature is when a quantum circuit (or algorithm) can be classically simulated efficiently. One example is this paper...

Hi, I would kindly appreciate it if someone could help me with my simulation problem. I am trying to simulate dual porosity in coal and the interaction of coal matrix and fracture flow. The problem I'm having is I can't assign separate domains with different pressures for matrix and fracture in...

Considering this system (from Wikipedia), The Fresnel Diffraction at x, y, and z is ##E \left(x, y, z\right) = \frac{z}{i \lambda} \int \int^{+\infty}_{-\infty} E \left(x', y', 0\right) \frac{e^{ikr}}{r^2} dx' dy'## where ##r = \sqrt{\left(x - x'\right)^2 + \left(y - y'\right)^2 + z^2}##...

Hey, I'm trying to look for a single test set-up for a dark matter-only simulation I and my friend are building. It's currently based on a particle-in-cell approach and we are calculating the Poisson equation and particle trajectories in a co-moving frame (so expansion of the Universe is taken...

Hi people. I just read some articles about physicist starting to gain more and more evidence for the Universe to be a 3D Hologram of a 2D world (or that's how I understood it). And apparently for us living in a "Matrix", like the one in the movie. Now I would like to understand the relation...

I'd like to write a computer program that simulates and visualizes the trajectory of a ray of light as it passes near a massive object (e.g., neutron star). In other words, I'd like to model light deflection in space. (FWIW, I have extensive programming experience, but my physics and...

Many people out there today seem to think that we'll soon have computers powerful enough to simulate the physical world well enough that we'll be able to upload ourselves and live in such a simulation. People really seem to think a Matrix situation is possible. Some, like Nick Bostrom, have...

Hi. As a teacher I know that many of my students find it difficult to understand the inclined plane and the forces involved. So I decided to create a simulation using geogebra. I uploaded a video to Youtube showing how the simulation works: The simulation is free to download if you want to...

Hello, I am working in Papua New Guinea where there is a great deal of seismic activity. I am interested in using MS Excel for simulation of SHM due to seismic waves. To investigate the how frequency and wavelength of the waves affects buildings. Does anyone have any experience of this type of...

Dear Friends, I'm trying to bulid a non-ideal hcp lattice in order to use in MD simualtion. I have12 lattice basis. but 2 of them are negative values. Can anyone tell me how I can convert the negative values to positive? 0.66667 0.33333 -0.0416 0.66667 0.33333 -0.1668

Dear all, I'm an electric engineer, and I usually work with software as Ansoft Maxwell, Matlab, Ansys, COMSOL... I need a PC for serious professional simulation, and I would like if someone can give me some tips of the characteristics I should ask for this purpose. I don't want to spend more...

Hello, I created script which draw plot of Lennard Jones potential for two particles. Now i want to create 2D simulation for 10 particles with verlet alghoritm but I have no idea how to create that. My problem is implementation of verlet alghoritm and calculating forces. I implemented boundaries...

I suppose some of you know the game called "Bridge Builder" (or Pontifex, or clones). I need some help determining how many FLOPS are required during the simulation and how do they scale with the bridge size (number of elements). Some of these bridges contain hundreds of elements and tens of...

Hello, First time poster in this forum. I am tasked with simulating small satellite dynamics in software this summer. I am new to this and am wondering how such a simulation is carried out. More specifically I am supposed to output the vector [ x y z xdot ydot zdot q1 q2 q3 q4 w1dot...