Simulation Definition and 899 Threads

Hi, guys, I am developing a simulation in Ansys Maxwell. I set up my simulation in the "transient mode", and I would like to evaluate the eddy currents that arise in a metal Vessel. The currents rise to a flat top in 20 ms and then after 20 ms in the flat top, it decreases to zero in 20 ms. I...

I wanted to simulate the Ising model and it was okay until I wanted to get the fluctuations <M^2>. In fact, first, I wanted to obtain the magnetization M : $$ M = \sum_i \sigma ^ z_i $$ and it worked, I got indeed the magnetization M by writing these lines : sigmaxop = [] sites = []...

Hey! This started very harmless... A friend and I were throwing stones in a lake. Mine didn't get very far, he was teasing me "What was the ideal angle again?". Of course, I know it should be 45°. I replied in jest: "That's because I'm considering air resistance!" Then we had a discussion what...

Hi, I hope I am in the right section of the forum. I was trying to understand the following algorithm: https://benchmarksgame-team.pages.debian.net/benchmarksgame/program/nbody-python3-1.html and particulary this part: def advance(dt, n, bodies=SYSTEM, pairs=PAIRS): for i in range(n)...

Hi folks. Hope everyone is having a good day. My name is Niko and I'm a software engineer and I'm pretty bored. Well you know, nowadays majority of software engineers don't create search engines for Google. And even ML if you think about it is pretty boring and consist mostly of preparing data...

Summary: Physics Graphics Simulation I am interested in modeling physics using graphics simulations. I took a python course with CS majors and one of the assignments was to simulate a planet orbiting a star. That being said, I was wondering if anyone knew of any good resources that I could...

I'm trying to understand how CST measures the RCS of an object. If not specified by me, it gives me (with a very brief simulation even for complex objects) graphs, both 3D and 2D, entitled 'Bistatic RCS'. With this wording I think that there is an antenna in a different direction than the one...

Hello! I am a student of the radio engineering faculty and now I am engaged in master's work. The purpose of my work is to find application for Ti3C2 in antenna technology. I found a lot of information from article http://advances.sciencemag.org/content/4/9/eaau0920 But I can't understand how...

What does quantum physics say about the simulation hypothesis?

How will the repulsion of electrons occur in the simulation hypothesis? The electrons will also create electrostatic fields around yourself ?

I created this in java just a while ago.

i have some green circle apearing on my simulation components as in the picture... please help me to solve that problem

I modeled a throttle body in Simulink. How do I model the position of the gas pedal so that if the position of the gas pedal changes the input voltage to the throttle body actuator will change and open the throttle? why should i give on the left side to get position of the gas pedal from the...

Hi, i have one big problem with this simple formula, i tried many ways and combinations, but nothing worked how i wanted it. Let's assume we have a distance, let's say it's 100000 units of any type, could be virtual since i am trying to program a 3d physics engine. The object pass that...

I have found on the internet an article from Gizmodo magazine, in which a LIGO team member answer some readers’ questions, regarding gravitational waves, and found a specific question and answer in that article, to be very interesting. The question relates to weather gravitational waves are...

Is there a way to generate an accurate visual computer simulation of gravitational lensing?

I was looking for simulation softwares that are free. I looked at some on the net, but they aren't satisfying my basic requirements. A simulation software should at least have the following for my use: Arduino support Support for buck converter Solid state relay Transformer Variable AC supply...

hi all I am going to do a project in ansys maxwel, actually i need to add a magnet and i know i have to do it with add material. my magnet is NdFeB . i give the material from net, actually i can not valid them because they are different in value. I need to calculate Mu(permeability ) and I nedd...

Hi, Can someone suggest me an open source code for simulation of (a,n) reactions? I want to build a geometry(sphere) with an a-decay radioisotope covered by Beryllium and count the neutron production. Thanks a lot

Hello, i need help to design a simple charger of output 5V / 1A . Just to represent the charging in simulink. Anyone for help ?

Hi, I want to make a simple nuclear reactor core simulation to calculate the thermal power production. Is there any open source code with interface (or not) that you recommend to use? The core have cylindrical shape with Uranium( up to 90% enriched) molybdenum fuel,Beryllium reflector and one...

Hi, I'm wondering if there any exists a Monte Carlo free code that can simulate dissociative ionization, per example a beam of protons on water, and then track the fragments (from water) and their energy. Thanks in advance!

I want to learn the density matrix renormalization group (DMRG) method in traditional formalism (not MPS). While there are many good introductory level articles available for bosonic (and spin) systems, I have not encountered any introductory level article which deals with fermionic systems i.e...

I want to exactly diagonalize the following Hamiltonian for ##10## number of sites and ##5## number of spinless fermions $$H = -t\sum_i^{L-1} \big[c_i^\dagger c_{i+1} - c_i c_{i+1}^\dagger\big] + V\sum_i^{L-1} n_i n_{i+1}$$ here ##L## is total number of sites, creation (##c^\dagger##) and...

Hello all: Can you use current of shelf multicore PC as a high performance computer Can it handle the job ? Dose the outcome data tables and simulation results , is correct and with low error margins With out gpu like cuda or opencl Best Hagop

I have been simulating a 2D particle/droplet motion inside a larger emulsion using Comsol where the flow field inside the emulsion is calculated from a moving mesh laminar flow simulation. my problem is: I always get an undefined variable error " Variable: comp1.w" however this variable is the...

I'm reading up a series of papers on hydrodynamical simulations for galaxies and cosmology. They keep mentioning things like "Lagrangian" or "pseudo-lagrangian" or "Eulerian". I tried looking it up on the internet, but the answers are either too broad and could mean a huge number of things in...

Homework Statement I wrote a brute force O(N^2) N-body code in python and I am not happy with its performance despite the fact that I have cythonised the calculation heavy parts as well as implemented MPI. I am currently out of ideas for how to optimise it further, can I get some advice...

I am looking for a comprehensive nonlinear transformer model, which should be available free, readily available for simulation in LTSpice and able to take account of various factors of nonlinear transformer including hysteresis characteristic, skin and proximity effect, leakage inductance...

Homework Statement I have a project to make the Solar system on Python, which I have done, but they also require from us to calculate the total energy of the system. We don't have to make the orbits of the planets elliptical, they should be circular and I believe I made them like that. Since...

Does anyone have an idea how to insert a BH loop like the one I have attached in Ansys Maxwell and not get an error like in the other picture which is also attached? I have seen it multiple times in different texts but can't define one myself without getting this annoying error. Also the...

Homework Statement I am required to obtain the following 1) Energy targets and pinch temperatures 2) Composite Curves 3) Grand Composite Curve with and without utilities? 4) What utilities are you going to use to fulfill the energy targets? Why have you selected these utilities? 5) Design a...

Hello, I am contacting you because I would like to know if there is a way to simulate quantum loop theory. Indeed, the S-Knots are much more complex objects than graphs because between the points there is a curve that can be knotted. S-Knots are graph embeddings in 3D and I do not see how such...

I am trying to simulate an electric motor in ansys maxwell software, but I can't define the whole loop in four quadrants for the material used in the rotor however it is essential to do this since the motor is of hysteresis type and works on the principle of working point moving all around the...

Let's say I want to simulate a 30-year investment return scenario by running n simulations (e.g. n = 1000) using a normal distribution with mean x% and standard deviation y%. My first approach was to generate exactly n sets of 30 samples from N~(x,y) but I realized that for any given set of 30...

Just as the title describes. I've been under the impression that the Simulation Hypothesis is pure metaphysics if it cannot be falsified. I'm wondering what other members think about it, whether anything empirical can be fathomed as to (dis)-credit it or affirm it.

Hello, I am looking for resources that show you how to design an simulate and engine from scratch. I want to design a complete engine using CAD. Afterwards I would like to analyze the engine using FEA and CFD (Heat transfer, fluid flow etc.) simulations. This is all for learning purposes. I...

Hello, I'm trying to simulate a 3 phase hysteresis motor with 4 poles, 36 slots, 220 input voltage peak for each phase, 50Hz, specified dimensions and 0.6 N.m output torque in maxwell transient. The magnetic material used is LNG52 which is also known as alnico600, alnico5DG(ACA52) and alcomax...

Hi - having come up blank when searching, I figured I'd ask here: do you know of any (free, preferably open source) planetary accretion models/simulators available for download? I'm primarily looking for solar system formation / evolution rather than planetary geochemistry (although I'd have an...

Hi guys, something has been bugging me for a while now and I thought I’d just ask it here in the hope someone can explain it to me. Ever since Elon Musk brought it up, I’ve been thinking about the simulation theory (I know it’s not his original idea, it’s just the event that brought it to my...

Homework Statement I'm simulating a warehouse (in Unity) where forklifts and other vehicles transport stuff from point A to point B. The routes are modeled as a graph with vertices and edges. Every transport is saved as a task in a backend system with the relevant data such as starting time...

Hi, I felt like I have to learn more than one coding language, and wanted to strengthen my coding skills in general. I am good with Relap5 but I want to learn OpenFoam. is what I did logical and going to be worth the pain ? also I only have the Relap5 version of a windows ,is it possible to run...

Hi guys. I'm using the Monte Carlo method to simulate a spin lattice. If I have a square lattice, L x L, I can plot the phase transition temperature by the inverse of the lattice length (1/L) to find the phase transition temperature in the thermodynamic limit (extrapolating the curve for 1/L =...

Hi, I'm simulating in MCNP6 the reaction of proton beam on targets but in the simulation the 96% of the proton are lost for energy cutoff. I don't understand why happen that. I use a tally4 to obtain the reaction in the target, but I suppose the results are wrong because the lost of protons (if...

Please forgive the awkward title. "Supermassive black hole" uses up a lot of the title character limit. Has anyone made a simulation of what would happen if a neutron star impacted a simplified (Schwarzschild) supermassive black hole? I've seen simulations of a neutron star colliding with a...

Greetings, for a Monte Carlo simulation of N hard spheres, I want to set up the initial configuration as a fcc lattice. I am thinking about how to do it most efficiently. Here is the lattice structure: The 3 lattice vectors, each one pointing to a different type of the 12 nearest neighbors...

which soft wares are used in gas sensor simulation?

Dear all, I would like to simulate X-ray tube and check the dose rate in the room. My problem is when I simulate 80kV electrons bombard to the tungsten target, there is just a few photons coming out from the tube window. And the dose rate at 1m from the tube is nearly zero which is impossible...

Hi all, I'm trying to simulate the Fresnel diffraction by using this expersion : $$ A(x')=\frac{1}{j\lambda z}e^{jk(z+\frac{x'^2}{2z})}F(A^{trans}(x)e^{jk\frac{x^2}{2z}})_{u=\frac{x'}{\lambda z}} $$ So when I use this formula my problem is that I don't know how to take the good frequency, here...

Hi All How can i simulate Graphene in Comsol? I am using semiconductor module . I s it correct to use Drude model? Drude model is in RF module but my simulation should be run in semiconductor module. How about Kubo formula?(for optics application or no?)