Simulation Definition and 816 Threads

Hello ,everybody I plan to develop a nuclear fuel cycle simulation software . Is there any body interesting it. I think this is a very complex project. :)

What's wrong with my circuit simulation? No gain is observed at the amplifier output. The intent is for the output gain of the 741 operational amplifier to be equal to R2/R1.

Can anybody please provide me any information on the LES, RANS and DNS? What is the basic vice of each and what are the differences? Why use one over the other? And additionally, are there any online lectures/videos that would help me understand the turbulence modelling methods better? Please...

Hi folks I would like to know maybe someone has some insight if you make a circuit in multisim (I have the 12 edition) and u go through everything then you run the simulation and it shows that all is ok and working like you thought it should what are the chances that multisim could be lying? I...

I am trying to perform a CFD simulation of a 70 degree sweep Delta Wing at different angles of attack (aoa = 20, 25, 30, 35 degrees). The inlet flow is at 25m/s. I have made a spherical Far-field boundary with the sphere radius of 5 times the root chord length of the delta wing. Because of the...

Hi all! I started learning about Monte Carlo Simulation. However, one thing that I don't quite get is that why for generating any random variable, we have to first generate a Uniform RV? What is the reason behind that? Thanks!

I'm looking for some event generator and detector simulation software. While I was searching, I found a lot of event generator software like PYTHIA, HERWIG, etc. But I was having difficulties in finding a software that will create a detector simulation. If you could tell me which event generator...

I have built the following circuit: http://i1226.photobucket.com/albums/ee410/jean28x/pspicemodel.jpg However, when I try to simulate it, I get an error that says "Simulation aborted because there are errors during netlisting. Please refer to the sessions log." What am I doing wrong? I'm new...

Hope you enjoy the following, http://www.youtube.com/watch?v=_Ssc1GsqHds&feature=player_embedded From, http://planetsave.com/2012/10/20/galaxies-trend-towards-more-ordered-disk-like-forms-over-time-upending-old-assumptions/

Hello. I wrote a simple gas simulation in python, with pygame. In the simulation the atoms collide elastic collisions with each other and with the walls. Although the simulation does run and the collisions look realistic, when I try to calculate physical parameters like p,T,V,n and compare them...

Hello I wrote a simple simulation of an 2D ideal gas, with elastic collisions. I wonder how should I simulate the pressure that is implemented on the particles in the box, by a piston with certain weight. it's easy to adjust the area of the box and the temperature of the particles which is...

Hello. I am currently a student at UCF in Orlando, FL. Simulation and modelling are big things around here. I have the opportunity to get my master's degree paid for by the lab I work in. I'm not terribly excited to stay here for another two years, but I really don't want to get a master's if I...

Hello, I'm trying to simulate disc galaxy dynamics with a nbody code. The main problem is to get good initial values (positions and velocities of each star) in order to reproduce the experimental dynamics. For the positions, I began by generating a gaussian distribution of stars on 0x...

Hi I built with Python a simulation of an ideal gas in 2D, treating the molecules as hard spheres with elastic collisions. I am trying to test the experimental values of P,T etc. in the simulation versus the theoretical values. however, I have two problems: 1) when comparing the pressure...

Suppose there are 3 balls colliding at the same time. I find that the order in which I resolve collisions makes a difference in the final result, which ofcourse makes no sense. To explain and keep things simple, consider 3 balls in 1D, all same mass, elastic collision. The numbers at the top...

Hello kind people of PF, I'm working on a project and attempting to simulate a ground source heat pump system in simulink. I have no experience what so ever with MATLAB or simulink, which isn't helping. Does anybody here have any experience of modelling such systems in this environment...

Hi Guys, I have an query. I would like to know the best tool for Simulation, Geomtry and Mesh creation. I want to simulate a duct with a turbine in it as a Part of my research project. I am beginner for the simualtion field so please suggest accordingly the appropriate software. Also please...

Hello all, this is my first topic here at PF, though I have been using this site as a homework aid for quite a while. Just to clarify, this problem is NOT a homework problem. I have been attempting to create a MOD for the 3D lego-like indy game called minecraft. Minecraft features a...

Are there any labs or private companies that can run particle beam simulations for a fee? If there are, any suggestions how to find them? thanks..

Hi all, Planning to do an Blast simulation on a vehicle. Should I go for FSI or Use the load as pressure. Please throw some light on the same. Thank you, TheSymbol

I am making a big assumption but if we live in a simulation... ...Would the real world affect are world the virtual world because of the double slit experiment? Would an outside observer of the simulation or a object outside the simulation or even the computer that the simulation built on have...

I've attached a graph of the pair potential between Mg and O. The peak attractive force experienced between the atoms is 1.6 eV, or 10^-19 Joules. From F=ma, with an O mass of 2.66*10^-26 kg the acceleration experienced by the atom is about 9650000 m/s^2, or 9.65 nm/fs (nanometers per...

hi i need a software that allow me to test capillarity action in different shaped capillarity tubes please advise me

I intend to use circuit simulation (namely ngspice because it runs on linux) to aid me through electric circuit studies. However, I recently encountered a problem in a circuit I was simulating: the plots were not logical - a capacitor was taking no time to reach its maximum voltage. At...

Hi all. I would like to do a finite element simulation of a coil in a time-varying magnetic field, to see how much current is induced in the coil, and also to see how the coil itself affects its surroundings. Now my question is, how do I model a coil with several thousand turns in a practical...

I recently downloaded LTSpice IV to use for testing circuits. Before I start to really learn the software I'd like to know if it's what I should be using or if there's something better. Basically I'm just testing simple circuits, but I do need the software to have a virtual oscilloscope.

Is it possible to simulate a bushing joint between to parts that would also conduct heat from one part to another?

Hello, first of all I apologize if there is already a topic with this solution but this is my first time here, and I'm a little lost :frown: I'm developing a work which consists in the determination of residual stresses due to TIG welding. I have developed the model and ran a successful...

This is the snap shot i took from Pspice simulation I have a doubt here ***why is voltage at non inverting terminal is 13.77V even though i connected 5V dc source to it and why the voltages at inverting and non inverting terminals are not almost same ( which we consider while solving opamp...

Those "moving near speed of light simulation" videos Lowly undergrad here. Have you people seen these relativity simulation videos? http://youtu.be/bYdohPiFF6Y for example. My question is, what causes this spherical distortion effect? I know about length contraction and time dilation, but...

Hi, I am making a program with the simulation software Breve. It codes in Python or in Steve (their own language). In my simulation, spherical particle with random radius are being spawned at random position into a little zone. My problem is that those particle cannot be superposed. I don't know...

I'm trying to create a simulation of shallow water flow and I keep getting huge values of variables. Does anyone here have experience with this type of computer simulations?

Hi all! I'm trying to solve the following problem. The number of successes in a sequence of N yes/no experiments (i.e., N Bernoulli trials), each of which yields success with probability p, is given by the well-known binomial distribution. This is true if the success probability p is...

hi everyone , i solved a textbook question which says : http://img268.imageshack.us/img268/8994/img1379sa.jpg http://img685.imageshack.us/img685/3228/img1380z.jpg and found analytically : ia = -470 uA, ib = 770 uA , ic = 22 uA, ig= 322 uA, is = 64.5 uA Ra= 1kohms, Rb=2kohms, Rc...

Hi all, I am simulating torsion tests (after being successful with tension and compression tests). For tension and compression, I got a good comparsion with experimental and behaviour in tension is same as in compression (of course leaving the necking part). For torsion tests, I have...

Runge-Kutta for gravitational N-Body simulation - "prediction" of acceleration Hey! I'm Raph, as you can see this is my first post, so, thus I'll start saying that it's nice to be here ;). I've got the following question: I'm simulating a system of N gravitationally interacting objects...

I intend to learn numerical simulations of collapsing stars. Could you suggest me some useful resources? i am familiar with matlab.

Theoretical, Experimental, Simulation, and... end of story? I know that this question cannot be answered with any absolute authority, but I'd still like to hear some speculation. Can there be a next frontier in the tools of science? Previously, we had experiments and theory. Later...

Is there a complete physics simulator that I can use to do lots of things while I learn physics? For example, I just learned about barymeters. It would be very interesting to simulate one. It could be done setting up a small atmosphere filled with a gas, the glass model and the liquid. Some time...

Hello, I'm currently conducting a very serious high school research project titled: Maximizing Energy Efficiency of a Linear Electromagnetic Accelerator I have recently been bestowed with a temporary license for a very advanced 3-dimensional electromagnetism simulator that should allow me...

I just was wondering if anyone here has pursued a degree in scientific computing / high performance computing / computational simulation and modeling, type of degree. For example Georgia Tech's Computational Science and Engineering degree or Computational and Mathematical Engineering degree, or...

Hi, I am working on a prelab for my electronics laboratory course. It's really simple (or at least should be. Basically he wants us to simulate the I-V characteristics of a D1N4002 diode. There is no resistor in the circuit we are to simulate (basically we're shorting it if you consider the...

Hey guys! I am working on a simulation of a brain blood flow model. Instead of programming something on my own, I wanted to check first whether there are any electric circuit programs that could do the job. I am using the flow-circuit/electric circuit analogy...

Hey all. I feel as if I've dug myself into a dead end and I'd appreciate some career advice. I'm a senior computer engineering student with a 3.8 GPA at a decent engineering school. I chose the major to further understand the mysteries of computers. I enjoyed learning what I did, because now I...

I have a question about silvaco athena && atlas simulation, MOS structure, when I gate length is 0.6um, get Vth is 1.8V, but I only change gate length to 0.55um, get Vth is 1.6V, it's a error data I know, but I do not know why, what wrong with the program, how can I change it. would you please...

Homework Statement Simulate the circuit from 10Hz to 10MHz. Produce the Bode Plot for the amplifier output (across RL). From the Bode plot, determine the following: i) Maximum gain, A(max) ii) The cut-off frequency, fc. iii) The frequency at the unity gain. 2. The attempt at a...

Homework Statement This is for a lab, which I'm working on at home. There are two parts: using Mathematica to simulate a magnetic pendulum with 3 magnets by plotting the path of the bob and then extend my code to determine where the bob endpoint for all starting positions and draw the fractal...

I´m wondering how to find out something about distribution functions after I´ve calculated the scewness. I have 15 numbers, mean is 3.206, highest is 7.028 and lowest is 0.9209. Variance is 2.958195. I calculate the skewness and got 0.945. I´m wondering which of the following distributions is...

Hello, i am Fluent beginner..im doing thesis about aerodynamics on solar race car.. have to study about its drag and lift coeeficient.. i need help about how to 3D mesh the car and the wind tunnel.. now i have draw the car model as one part and the big square as wind tunnel as another...

Please understand my low command of English. I'm developing Direct Simulation Monte Carlo and I'm now validating. To validate my DSMC code, I'm checking the viscosity in Couette Flow. Simulation Condition is, Kn = 0.0056(Near Continuum) and Gas is Nitrogen, Temperature is 273K. Nitrogen...