Simulation Definition and 816 Threads

Hi. I have to do a molecular dynamics simulation with atoms in water. The simulation takes a lot of time in vacuum so I can't have a very sophisticated model (like 3 body collisions) for water. I was thinking of a one-site model with a Lennard-Jones potential, but I was wondering if there was...

Hi...i have question on RLC circuit. Why my max.voltage of complex sinewave in Excel is different from the simulated complex waveform? which one is right? max.voltage of complex waveform in excel = 106.8V max.voltage of complex waveform in simulation = 126.8V Should it be the same?

Are there any usable simulation in the literature on the formation of a solar system? It is possible for example that a solar system has 100 big planets?

i have to make a physics simulation using box2d and actionscript3.0. So can anybody give me an interesting idea for this

I want to write a classical program, which simulates a quantum algorithm. Any suggestions for which programming language would yield the best results, which algorithm would be the best to emulate, and what's the best way to go about beginning? Thanks

Homework Statement Design projectile motion simulation and produce the max height, inital and final velocity, range, and time of flight. must use digital or photographic tech to record events and assist in the experiment> Okay so I've designed a half projectile motion simulation. A ramp...

Hi, I'm new to the forum and is currently working on a project where we are going to do a FEM-analysis of a structure with parts that is welded together. The parts are not welded together by spotwelds, but welded along a line. My problem is that I don't know how to simulate this in ANSYS...

The following computer simulation http://phet.colorado.edu/en/simulation/photoelectric contains a serious error: if you in the saturation (U >> 0V) with the same intensity change the wavelength of light, the photocurrent also changes...

I am looking for a help in finding out the recommended programming language for real time (30 frames/ sec) particle simulation. This simulation involves a lot of calculations and Physics (fluids,...). I do have a little experience with C++ and I want to concentrate a good part of my time on...

I've been hearing that these (MERCURY and Swift codes) are standards for N-Body evolution simulations. Neither of them seem to be currently in development however. Does anyone know if these (or others) are indeed still commonly in use? If anyone has used either or both, could you say a few...

Hello everyone, :smile: At now I know there are these programs to draw circuits and simulate them: LTspice, CircuitLogix, Multisim. I am beginner to these circuits and don't know much how to use such technical programs. So which program will you recommend me to use? I want it to have...

I've just started thinking about this and haven't read much about the "simulation argument" yet, but is there anything unreasonable about using computational/information theoretic/Occam's razor arguments to argue that the simplest explanation for the universe is that everything is being...

Hi I had to write a program to simulate the pion branching fraction in a pion two body decay. To begin with, the pion decays either to a positron or to a muon which again decays to a positron. So, the pion beam hits a target and decays at rest to positrons. Then the positrons fly off in...

Hey All I'm going to implement a tennis net for a video game. I already have the animation of the net in place (I think) through cloth simulation. What's missing is a physics simulation of the collision between the ball and the net? I think the net could be modeled as an elastic rectangular...

Hi, Do anyone know where to get free process simulation software, please, if you know let me know, thanks.

Hello everyone, Physion is a 2D Physics simulation program. It is quite difficult to explain its features and how exactly it works so please watch the videos below to get the main idea. https://www.youtube.com/watch?v=P32UHa-3BfU https://www.youtube.com/watch?v=GgbH7_Gc8fE Physion...

Hi to every one I want to simulate Rf lab plasma and DC glow discharge plasma But let me make clear one thing Consider me as a starter to both plasma physics and simulation So is there anyone who can help me in this respect to guide me from zero Regards

Firstly, let me excuse myself for not knowing the most appropriate location to post this question. This is a question pertaining to Graph Theory, but the heart of the application is intended to be driven by the math and/or simulation of classical physics. At work I am currently attempting to...

If we measure a quantity with 2 different tools(once by direct measurements and the other time through simulation), is it true if we compare these 2 results together by using paired t test? Does it makes sense ? For example we want to measure the aborbed dose of a patient, so once we measure...

Do you happen to know about any resources on the gravitational N-body problem and general relativity? Ideally some open-source implementations or pseudo code. I'm doing a N-body simulator for my bachelor's thesis and my advisor was wondering if I could add some algorithms that take general...

Am I trying to use the LTC4440 as a high side mosfet driver, but when I run the demo simulation in LTSPice, this is what I get from the output from TG. There seems to be no boost to the gate control, so how can this drive any MOSFET, much less a FET with a drain voltage of 70 as specified on the...

Hello everyone! I'm a brazilian electrical engineer student and enthusiastic on development of circuit simulators, with a approach on the DC-analysis and Transient analysis. now I'm using one book released this year by "wiley and sons", it is a very good one, called "Circuit simulation - Farid...

This is a very cool liquid simulation: http://grantkot.com/MPM/Liquid.html.

I'm having problems with an n-body simulator. I tried to use the gravitational equation for vectors, however that didn't exactly work, so I split up the forces into their respective X and Y components and used two separate gravitational equations. The problem is the entire body is exploding...

Homework Statement Hi for fun, and to understand physics better I have scripted a program that replicate gravity exerted from one force (ex the Earth rotating around the sun) and it works well. But now I want to have mutliple bodies that affect gravity and using the same equations it isn't...

I'm a little outside my area of expertise here - I've used ADS to exhaustion, but now I need to simulate a MESFET I designed. Anyone have any recommendations for software? Our computer labs have quite a bit, but if there's a nice free/lite version that would be ideal. Thanks in advance.

Hello everyone! I'm looking for a software in which i could simulate physical experiments from the field of classical physics. Before you start recommending matlab, i would like the software to be, well, a bit "higher" :) What i mean by that is that is should simulate the model in 3d...

Hi all, I am a student designing a camera fixture for my senior design project. We are halfway through our project right now and we are trying to do some validation stuff for our fixture. One of the requirements for our fixture is for it to withstand 6 g's of shock during...

Hi, I am working on simulating the change in temperature over time for the ground, given different material types. For instance, I'm considering an asphalt patch of ground say 10 square meters in area. For now, I'm willing to ignore atmospheric effects like rain, wind, and varying sun...

Hi. We have a problem, we need to simulate the engine and transmission of a car in our project. Now we take rpm of the wheels and on the basis of it we calculate engine's rpm RPM = RpmFromWheels * Gear * MainGear and then we calculate and apply force from engine to the wheels. EngineForce =...

Hi all... Im trying to model a simple lattice-gas ( ising model ) system , using MC metropolis algorithm. I am having trouble with the code. I am trying to do it in matlab. My lattice gas does not show the characteristics it should. I used my old Ising Model code, which I modified to do...

hello everybody. . i am a college student. . and this year we are to write a program to simulate a physical phenomenon. . i chose Newton's cradle. . so please if anyone has any precious info about this topic, or if anyone wants to suggest another topic for me to work on. . write it here. ...

Hi guys I've been googling for awhile but sadly i can't find the answer i need (idk maybe because my googling skills suck :D) I am Software developer and I'm trying to build 3D artillary simulator I need some help on this one if u don't mind (I hope this is the right forum to post this)...

Hey guys I am using some simulation tools and wondering what is an electrical net? google didnt help:D

Hi Everybody, This is my first post here, and I hope I'm in the right place for my question... I have a small problem , I need a simulation software that can calculate the magnetic (and optionally the electric) field in a closed space that is surrounded by an array of inductors. Right now...

Mechanical Simulation Programs?? Hello i would like to know what is the best program for mechanical simulation, and the easiest one to learn and get used to (price doesn't really matter for now) the systems i want to test contain gears, springs, cranes and some pulleys all are simple...

You are in training to be an astronaut. In one of your training simulations, your goal is to land a lunar excursion module (LEM) on the surface of the Moon. This LEM has two rocket engines attached to the center of the craft. The engines typically point at angles of 22.0° in opposite directions...

I am trying to find out RPM and torque of a turbine. I have it modeled in CATIA. I have ansys and Fluent. But I don't know if I can get these values from that software. Does anyone know how I can do a virtual simulation to determine Torque and RPM?

Hello physicists! I'm a comp sci student and I am trying to graphically model a simplified version of the solar system as part of a programming exercise. In order to apply the gravitational forces to the planets, I need to compute the Jacobian matrix as it relates to two particles (planetary...

Hi guys. I just want to know how Modeling (Mathematical modeling), simulation and Engineering Design are related. Your views are welcome. Any references and links would be appreciated. I just want to know more about the Design Process and how different processes and techniques are used for...

I've been reading book called 'The Big Questions: Physics' by Michael Brooks during my trip to Warsaw. It's an enjoyable collection of essays despite the fact that they were perhaps slightly too basic at times for a physics student like me. What grabbed my attention though was the simulated...

i have try this rate equation code in MATLAB. but its not working. can anyone help me please! mm=0; for I = 0.1e-3:0.1e-3:4.5e-3; m=mm+1; q=1.6e-19; alpha=2; Tn=3e-9; Tp=1e-12; G0=0.6; N0 = 1e24; Gamma=.2; epsilon=1e1; Va=3.7e-14; tini=0; tfin=4e-9; dt=1e-12; N(1)=0; S(1)=0...

Hello, I have a question regarding how I'm simulating motion using the common time integrating approach to simulating rigid bodies. I have net forces and solve for position from those: acceleration = force / mass velocity = initial velocity + acceleration * time position = initial position...

Hi everybody. how r u. i'm using linear technology's LTSpice IV to simulate my dc/dc switching power supplies. for that I'm using the chips from the same company. the problem is that when i simulate the circuit using LTSpice IV the simulation speed that it shows is only 25microsecond/s which...

Homework Statement I want to simulate OFDM using 16-bit QAM in Simulink. The main problem that I'm facing is regarding generation of digital signals and splitting a digital signal into two or more data streams, as we require in OFDM. Homework Equations The Attempt at a Solution...

How effective is simulation in fusion research? Many years ago i designed simulators for fission reactors and they were extremely accurate, sometimes approaching 1% accuracy in terms of core behaviour. It seems to me that it should be possible to determine whether ITER can exceed breakeven, for...

Vhdl help! Please help...This is driving me crazy. I am just trying to setup a simple comparing component. The code compiles fine, but the simulation is WAAAAAYY off. could somebody please check this? Thanks --Temprature high or low -- library ieee; use ieee.std_logic_1164.all; entity...

Hi everyone! I'm running and modifying some code from the Alejandro Garcia book, "Numerical Methods for Physics". I generalized it to three dimensions, but noticed a problem when calculating the average temperature. Then I went back to the original, untouched program, and found that the problem...

hello i'm new to using orcad capture 9.2 so I'm having problems with the simulation. i'm trying to simulate this regulator circuit using transient analysis. then when i clicked run, the green circle appeared. I'm wondering maybe you need to tweak something first on the parameters of the...

Hallo, i'm trying to implement a comsol simulation of a impedance spectroscopy experiment. But unfortunatly I'm an absolut beginner in Comsol and i have many problems with this work. First of all i want to say that I'm using the AC/DC module, more precisely the transient analysis. At the...