The simulation tag has no wiki summary.
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0answers
174 views
Equations that govern SPICE models and how to perform the same simulations in MATLAB [closed]
SPICE is a great tool, but I want to be able to write my own code in MATLAB such that I can get faster results.
To start with, I have a simple but specific requirement. Once I understand and can ...
0
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1answer
333 views
Time traveling and Time dilation within a multiplayer videogame [closed]
First thing first, I'm looking to implement this within a multiplayer videogame as a "special" skill or powerup, but, I'm willing to build it upon a physics based explanation/theory.
The question may ...
2
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0answers
82 views
Gibbs Ensemble initial densities
I'm trying to calculate coexistence curves and get a rough estimate for the critical point of simple fluids using the well-known Gibbs Ensemble Monte Carlo (GEMC) (c.f. Panagiotopoulos, Molecular ...
2
votes
1answer
49 views
Creating/Downloading a large Galaxy Dataset
I was wondering where I can get a more or less complete set of a galaxy to test an n-body simulation (preferably two colliding galaxies with approx 300k to 1M elements).
Is it possible to extract ...
4
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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 ...
1
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1answer
213 views
simulations at constant pressure-volume and constant volume-temperature
I have read some papers where the authors perform simulations at constant pressure
and constant volumen or sometimes constant volume constant temperature. My question
is when is it better to use one ...
13
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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 ...
2
votes
2answers
211 views
Why is it important that Hamilton's equations have the four symplectic properties and what do they mean?
The symplectic properties are:
time invariance
conservation of energy
the element of phase space volume is invariant to coordinate transformations
the volume the phase space element is invariant ...
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 ...
0
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2answers
429 views
Plotting a wave function that represents a particle
The problem is this:
A particle is represented by the wave function $\psi = e^{-(x-x_{0})^2/2\alpha}\sin kx$. Plot the wave function $\psi$ and the probability distribution $|\psi(x)|^2$.
This ...
2
votes
3answers
366 views
Finite difference formulation of the heat equation with thermal conductivity in 1D
This may seem trivial, but I'm having some trouble deriving the finite difference form of the heat equation with a thermal conductivity function $a(x)$ depending on $x$:
$$\frac{\partial u(x, ...
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 ...
3
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1answer
122 views
Smoothed particle hydrodynamics in cosmological N-body simulations
What is the role of smoothed particle hydrodynamics (SPH) in cosmological N-body simulations like the Millenium Run (performed with Gadget-2)?
5
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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 ...
2
votes
1answer
345 views
$N$-body simulation in General Relativity
How would one perform an $N$-body simulation in General Relativity (GR) for something like galaxy formation or galactic dynamics?
Suppose one wants to simulate the rotation curve $v(r)$ for galaxies ...
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 ...
4
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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 ...
2
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0answers
48 views
Degenerated Anderson Model Simulation
I'm trying to simulate the degenerative Anderson model. So depending on an energy difference first orbital and afterwards spin magnetism occurs. First i try to solve an easier ansatz with a limitation ...
5
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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 ...
0
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0answers
60 views
How to display particles [closed]
Not exactly physics question but physicist must have encountered this problem before.
In my code I generate a table of six tab separated columns (x,y,z,type,charge,id). I want to create a 3d ...
8
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10answers
75 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.)
...
12
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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 ...
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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 ...
9
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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 ...
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 ...
1
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0answers
507 views
Damping and stiffness constants of water
I'm working on a simulation of water drops falling into a pool. I'm specifically interested in the waves generated by the impact of the drops. In order to calculate the vertical motion of the waves, I ...
11
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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 ...
4
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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 ...
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 ...
2
votes
1answer
444 views
Software for simulating supersonic aerodynamics [closed]
Could you please suggest the software, where I can load my 3D model and see how it behave on various conditions (speed - preferably including supersonic, temperature, pressure)?
Both free & ...
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
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 ...
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.
...
10
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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 ...
1
vote
1answer
2k views
Calculation of the G-force
I have a formula which is $\text{G-force} = \frac{v\omega}{9.8}$, where $v$ is speed and $\omega$ is the angular velocity. I've seen on the internet that G-force is actually $\text{acceleration}/9.8$. ...
5
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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 ...
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7answers
2k views
Does Quantum Physics really suggests this universe as a computer simulation? [closed]
I was reading about interesting article here which suggests that our universe is a big computer simulation and the proof of it is a Quantum Physics.
I know quantum physics tries to provide some ...
7
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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 ...
3
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4answers
298 views
