The simulation tag has no wiki summary.
16
votes
2answers
713 views
Why can't Humans run any faster?
If you wanted to at least semi-realistically model the key components of Human running, what are the factors that determine the top running speed of an individual? The primary things to consider would ...
13
votes
2answers
29 views
Sampling typical clusters between distant points in subcritical percolation
I have on several occasions wondered how one might proceed in order to sample large subcritical Bernoulli bond-percolation clusters, say on the square lattice.
More precisely, let's consider the ...
12
votes
2answers
201 views
What open-source n-body codes are available and what are their features?
I'm interested in doing simulations with large numbers of particles and need a good n-body code. Are there any out there in the public domain that are open-source and what are their strengths and ...
11
votes
2answers
433 views
How to model/simulate pressures and flows in a network of pipes
I'm having a hard time finding information on how to model/simulate this. I attached a couple files, both of which show an example tank & pump network. It's just nonsense that I made up for this ...
10
votes
14answers
9k views
Best (most realistic) physics game? [closed]
Inspired by a similar post, I wanted to know what video games, past or present, most accurately employ the laws of physics.
I believe this is an appropriate question for this site, since the users ...
10
votes
1answer
603 views
How realistic is the game “A slower speed of light”?
The game "A slower speed of light" from MIT claims to simulate effects of special relativity:
Visual effects of special relativity gradually become apparent to the
player, increasing the ...
9
votes
7answers
1k views
How many bits are needed to simulate the universe?
This is not the same as: How many bytes can the observable universe store?
The Bekenstein bound tells us how many bits of data can be stored in a space. Using this value, we can determine the ...
9
votes
1answer
183 views
Solution to the Schrodinger equation for periodically time dependent Hamiltonians
I have a Hamiltonian which is time dependent but possesses periodic symmetry: $H(t+t_0)=H(t)$. Is there any clever techniques to exploit this? Edit: In particular, I would like a practical method to ...
9
votes
1answer
74 views
How can one build a multi-scale physics model of fluid flow phenomena?
I am working on a problem in Computational Fluid Dynamics, modeling multi-phase fluid flow through porous media. Though there are continuum equations to describe macroscopic flow (darcy's law, ...
9
votes
3answers
378 views
When is the “minus sign problem” in quantum simulations an obstacle?
The "minus sign problem" in quantum simulation refers to the fact that the probability amplitudes are not positive-definite, and it is my understanding that this leads to numerical instability when ...
8
votes
10answers
76 views
Are there websites or programmes that permit a simulation of the night sky in the past and the future on an ordinary computer?
Are there websites or programs that permit a simulation of the night sky in the past and the future on an ordinary computer?
(For the past, I would be content with objects visible to the naked eye.)
...
8
votes
2answers
495 views
How are Monte Carlo simulations used in experimental high energy physics?
How are Monte Carlo simulations used in experimental high energy physics? Particularly in studying detectors limitations (efficiencies?) and data analysis.
I will appreciate giving a simple example ...
7
votes
2answers
116 views
Simulation of QED
Can anyone point me to a paper dealing with simulation of QED or the Standard Model in general? I will particularly appreciate a review paper.
7
votes
2answers
1k views
Where can I find simulation software for electricity and magnets?
Is there easily-available* software to simulate coils, solenoids, and other magnetic and electromagnetic devices?
I'd like to play around with some design ideas, such as Halbach arrays, but physics ...
7
votes
1answer
157 views
How do subgrid-scale parametrisations in climate models work?
Global Circulation Models typically have grids of 100-300km on a side. There are obviously lots of atmospheric processes that happen at smaller scales than this. Convection, cloud formation, the ...
7
votes
1answer
207 views
Simulating the evolution of a wavepacket through a crystal lattice
I am interested simulating the evolution of an electronic wave packet through a crystal lattice which does not exhibit perfect translational symmetry. Specifically, in the Hamiltonian below, the ...
7
votes
1answer
141 views
Parton showering in Pythia 6 Monte Carlo generator
I have Pythia Monte Carlo (MC) samples where I can't understand the parton showering model. If I print out full decay chains from the events, each event contains multiple string objects with pdgId 92. ...
6
votes
3answers
592 views
Does it exist a free good molecule / atom simulation software?
I'm looking for a software or software package (for example C/C++) that can simulate a lot (say thousands at least) of molecules in action (ie. in movement or attached to say static walls).
I have ...
6
votes
2answers
287 views
Use of Monte-Carlo simulation in High-energy Physics
I've been doing some research into the analysis used in particle physics when determining the significance of a finding (e.g. the recent Higgs candidate was announced as a boson in the 125-126 ...
6
votes
1answer
139 views
Why doesn't my particle simulation end in a flat disc?
I've made a 3d particle simulator where particles are attracted to each other by the inverse of the square radius. The purpose of my experiment is to see if this alone would create a flat disk (like ...
6
votes
1answer
259 views
How to simulate a crashing wave?
I'd like to create a very rough animation of a wave crashing on a beach. I'm guessing it would have to be a particle simulator, where you code in the forces between the particles and then integrate ...
6
votes
1answer
159 views
partial trace with sparse matrices
Let $\rho_{ABCD}$ be a sparse matrix of 4 systems each in a $d$-dimensional Hilbert space.
For $d<7$ in a reasonable time (few seconds) I able to perform the partial trace $\rho_{AD}$ using the ...
5
votes
4answers
1k views
Trampoline physics - what is the right time to crouch and to jump to maximize your height?
Please bear in mind that I'm neither a physics guy nor particularly a math guy. So I will probably need a bit more hand-holding than just a complex equation.
For a game, I'm trying to calculate a ...
5
votes
1answer
168 views
Resonance modes of a cubic box of water which we shake
I don't know hydrodynamics, but I wonder how one would compute resonance modes of a cubic box of water which we shake. I believe the waves would directly depend on the height of water and the width ...
5
votes
2answers
219 views
In condensed matter simulations, how is particle number density computed in practice?
I have been reading a recent paper. In it, the authors performed molecular dynamics (MD) simulations of parallel-plate supercapacitors, in which liquid resides between the parallel-plate electrodes. ...
5
votes
2answers
512 views
Trying to model pinball physics for game AI
I'm working on an AI for a pinball-related video game. The ultimate goal for the system is that the AI will be able to fire a flipper at the appropriate time to aim a pinball at a particular point on ...
5
votes
3answers
210 views
Simulate a physical impact of objects made of finite, small elements
I want to simulate an impact between two bodies according to gravity, and eventually considering other forces to stick matter together. I'd like to use python to do this, but I am open to ...
5
votes
3answers
268 views
How to include random force in the simulation (Classical Molecular Dynamics)
I need to implement a random force in my code according to the fluctuation dissipation theorem. I have a Gaussian distribution function ready width average 0 and distribution 1 and I know I need to ...
5
votes
1answer
142 views
Why do air bubbles stick to the side of plastic tubing?
I'm watching water with air bubbles flow through transparent plastic tubing. The inner diameter is a few mm. Bubbles typically are the same diameter as the tubing, with length about the same or up ...
5
votes
1answer
83 views
Convert latitude of lowest altitude to argument of perigee?
I am designing an orbit around Mercury. I know the values I want for the semi-major axis, eccentricity, inclination, and RAAN. I want the altitude of closest approach (periapse) to occur at ...
4
votes
1answer
446 views
Stellar evolution simulation engine or software
Is there any general purpose stellar evolution simulation engine or software? Something to throw in properties of the star and to watch how (and why) they change along the timeline - with or without ...
4
votes
3answers
822 views
Why is the canonical ($NVT$) ensemble often used for (classical) molecular dynamics (MD) simulations?
Molecular dynamics (MD) simulation is a common approach to the (classical) many-body problem. It relies on integration of Newton's equations of motion to simulate the trajectories of many (e.g., ...
4
votes
2answers
200 views
How to calculate linar velocity of planet orbit?
I try to simulate a solar system with planets (with random mass) placed randomly around a sun with a mass $X \times \text{solar mass}$.
The simulation is going well when I use real data ...
4
votes
1answer
355 views
Plotting a SHO in matlab
I have no prior experience of using matlab. My teacher want me to solve this question. I have been trying for a couple of hours now with no luck, please help!
The mass of 100 g hanging in a spring ...
4
votes
1answer
154 views
Kerr geodesics differential equations in equatorial plane
With friend, we are writing an interactive educational simulation of particle falling into a black hole.
Currently we use Schwarzschild geodesics. However, we want to generalize it to the case of ...
4
votes
3answers
36 views
How can one predict the length of the Synodic month? Why is it irregular?
I'd like to write a program that uses the exact (down to the second) amount of time from one new moon (or full moon) to the next.
Yet, I am told that this period is irregular.
Yet, it seems to be ...
4
votes
1answer
92 views
Direction of planetary tilt
I am building a 3d solar system simulation using WebGL and have come across the problem of establishing the direction of tilt of the various planets. No I know the tilt of the planets in degrees what ...
4
votes
2answers
28 views
Lumped circuit model of Earth and Sun as a thermal system
I want to design a thermal model of the Sun heating up the Earth. The circuit below is my own design (I don't know if there is a better way to model it. If there is, please tell me.). I want to ...
4
votes
1answer
135 views
Event-by-Event Simulation of Quantum Phenomena
I just recently stumbled over
http://rugth30.phys.rug.nl/dlm/
and
http://www.sbfisica.org.br/bjp/files/v38_26.pdf
As the title suggests these are presentations of mathematical models capable of ...
4
votes
0answers
45 views
Animating the Bosonic String
I am interested in studying the classical solutions to the Bosonic string in flat 3+1 dim. spacetime by having them rendered a moving picture on a computer. This is partly for fun, and partly to ...
4
votes
0answers
155 views
Cellular automata rules for quantum mechanics
My limited understanding of quantum theory is that a quantum system is completely described by its wave function, which deterministically evolves according to Schrödinger's equation until wave ...
3
votes
4answers
298 views
3
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7answers
2k views
Is there a general physics simulator for learning purposes?
Is there a complete physics simulator that I can use to do general simulations for learning purposes? For example:
Create a sandbox.
Fill with a gas.
Load a 3d solid model like this (but 3d).
Fill ...
3
votes
1answer
133 views
Simulating a black hole binary system
As part of a project for my degree I am writing code to simulate N-body gravitational interactions, however I have to then use this code to investigate something. Struggling to think of ideas I ...
3
votes
1answer
532 views
How can I model buckyballs sticking together? (Tiny spherical magnets)
Buckyballs are a desktoy that consist of 216 tiny spherical magnets. You can makes all kinds of interesting shapes and structures out of them (do a Google search).
I want to model them in a physics ...
3
votes
1answer
360 views
Primer on Liquid/Ink Splatter Physics
I'm looking for primer material on the modelling the physics of liquids. In particular I want to make a small simulation (I'm a programmer by profession) of throwing ink at a board, much like this.
...
3
votes
2answers
139 views
Simulating a proton
How much computing power would it take to simulate a single proton from the bottom up, without taking any shortcuts whatsoever?
My current understanding is that:
A proton is basically a seething ...
3
votes
1answer
368 views
Simple 2D Vehicle collision physics
I'm trying to create a simplified GTA 2 clone to learn. I'm onto vehicle collisions physics. The basic idea I would say is, To apply force F determined by vehicle A's position and velocity onto point ...
3
votes
0answers
57 views
Final-state baryons in $p \bar p$ collisions in Pythia
I'm trying to simulate inclusive $\chi_c$ production in $p \bar p$ collisions at very low energies (~ 5.5 GeV) using Pythia8 event generator. Leaving aside problems bounded with applicability of ...
3
votes
0answers
51 views
Searching for a collaborator for a physics simulation of multi-party elections [closed]
I have completed a series of physics simulations on Matlab to find the equilibrium positions of parties in 2-D or 3-D voting space and compared them to the optimal positions that would provide the ...
