The simulation tag has no wiki summary.
3
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2answers
62 views
Can the axis of rotation of a celestial body point in any arbitrary direction?
I am developing a small computer program that involves moderately simple simulation of elliptical Kepler orbits for fictional, generated star systems. I'm doing this without much prior knowledge of ...
0
votes
0answers
20 views
Outflow for fluid simulation based on “Stable Fluids”
I've implemented a fluid simulation based on the paper Stable Fluids.
It works quite well, except I would like to have the velocity at the "upper" edge just to outflow and not to re-enter on the ...
3
votes
1answer
42 views
Light scattering vs roughness
I've been searching for an answer to this question in professional circles for a while; now I'd like to ask here, to find out why the answer is not there :)
In my optical modelling (computer ...
0
votes
1answer
55 views
Bouncing ball simulation computer science
In my Computer science class I was given a problem where I have to simulate a bouncing ball using "real physics". I have been trying to find a equation that will simulate the height of the bounce ...
1
vote
1answer
44 views
Function for heating of a planet by its star
I'm looking for an algorithmic model which will gives rough estimate of the average temperature of a planet's atmosphere (good enough to say whether there will be liquid water anywhere, or if metals ...
3
votes
1answer
64 views
What are the limitations of Smoothed-Particle Hydrodynamics?
I've been excited by some of the possibilities of Smoothed-Particle Hydrodynamics (SPH). I have seen some very exciting demonstrations of their use in 3D graphics, but I am wondering how well the ...
0
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0answers
23 views
Verlet Leap-fog Method of approximating orbits [migrated]
I found the following simulation of an orbit given the semi-major axis of the ellipse, eccentricity, initial velocity, the mass of the object being orbited, and initial position of the orbiting ...
3
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0answers
40 views
Modeling the formation of a stellar system and matter accretion
I am trying to figure out what do I need to know to properly simulate the creation of a solar system from a particle cloud with random distribution of hydrogen atoms.
Being more of a programming ...
1
vote
1answer
103 views
Fitting a circuit scheme to a simpler model
I have to simulate the electric field within a gas filled discharge gap generated by a radio frequency voltage generator. The circuit, provided to me by the experimenters somewhat far away, is given ...
1
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3answers
62 views
Magnetic B Field of Point Charge Not at Constant Velocity
I'm working on an N-body simulator for charged particles. I know that moving charged particles generate a magnetic field, and another moving charged particle could be effected by this magnetic field.
...
0
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0answers
34 views
Molecular dynamics simulation: fluctuating dipole model implementation
I'm conducting a molecular dynamics simulation for silica. Some time ago I turned to the fluctuating dipole model, and after much effort I'm still having problems implementing it.
In short, all ...
0
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0answers
20 views
How to make a fan like behavior [migrated]
I am making a game in Unity. I have an object e.g. cube. I want to release air from it like fan so that when other cubes come closer, it throws them away. What velocity,force etc I will need to do ...
-3
votes
1answer
64 views
How do we simulate Nuclear explosion? [closed]
I am interested in PC simulation, i use physics equations to simulate rain, fire, wind, cloud and lightning. it is a kind of VR (virtual reality).
what equation is able to simulate a virtual nuclear ...
-1
votes
1answer
74 views
Earth and Moon computer simulation [closed]
So I want to simulate the solar system but want to start simple with one orbiting body.
However, I never did anything like this before and was wondering if anyone here could give me some hints.
...
1
vote
1answer
111 views
Initial position and velocity of rocket to escape earth's gravity
I'm trying to numerically simulate a spacecraft trajectory between earth and mars. I already wrote the solar system model where the sun is at the origin of the x,y,z plane Earth and Mars are orbiting ...
0
votes
0answers
25 views
If we find a way to simulate a universe, are we likely to be living in a simulation? [closed]
If we eventually find a way to use quantum computers to simulate the creation of a consistent universe, does that prove that we are extremely likely to be living in a simulation?
16
votes
2answers
752 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 ...
1
vote
1answer
62 views
Deriving the change in the Helmholtz free energy in the context of the free energy perturbation method
I am reading Free Energy Calculations: Theory and Applications in Chemistry and Biology by Chipot and Pohorille. At the beginning of the text (page 19, for example), the authors define the Helmholtz ...
0
votes
2answers
100 views
I want the Saturn's position in terms of Declination and Right Ascension?
I want the Saturn's position in terms of Declination and Right Ascension for a couple of month in the interval of 1 hour in a text file to do a simulation. Which site can provide me these data?
Or, ...
2
votes
1answer
69 views
Simulations of Planetary Motions
I wrote a spreadsheet that simulates the trajectory of 3 planets in 2D space. The method is simple: for each moment in space, calculate the force felt and velocity of each planet, then for the next ...
3
votes
0answers
60 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 ...
2
votes
1answer
86 views
Local minima in Ising model in a Monte Carlo simulation
Is there any way to check whether in a Monte Carlo simulation using Ising model is stuck in any (false) local minima of energy or not, particularly in 3D system ?
2
votes
2answers
87 views
Erogodicity in a Monte Carlo simulation
Q1: What is the ergodicity and ergodicity breaking in a Monte Carlo simulation of a statistical physics problem?
Q2: How does one ensure that the ergodicity is maintained ?
-3
votes
2answers
95 views
Argument against computer consciousness [closed]
Imagine that we have a computer program that produces the conscious awareness of the present moment.
Let us assume that every time the program is run a counter is incremented.
Let us also assume ...
1
vote
1answer
57 views
Simulating an orbit, primary is not at focus
I've been toying around with some -very- simple orbital simulators, mostly using preexisting physics libraries (I took a layman's stab at doing it with vectors too). The thing that is confusing me is ...
0
votes
0answers
163 views
Simple thermodynamics simulation software [closed]
Just looking for some simulator that I can model a simple boiler with a heat source, overpressure valve and steam tap so I can play around with some parameters and learn the fundamentals of heat ...
0
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0answers
45 views
Should a 1D Guassian wave oscillate?
I wrote a few lines that numerically solve Maxwell's equations.
The result is a moving wave that looks like a single pulse.
This looks strange to me because I expect waves to move in oscillator ...
1
vote
1answer
42 views
What creates the differences between the two channels of a stereophonic signal?
Given two identical microphones arranged in an ideal XY pattern, recording a single sound source at equal distance from both capsules, the two signals obtained are equal in amplitude, perfectly in ...
1
vote
1answer
81 views
How to get the new direction of 2 disks colliding?
I'm developing a 2D game including collisions between many disks. I would like to know how I can get the angle corresponding to the new direction of each disk.
For every disk I have this information ...
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 ...
2
votes
2answers
65 views
How should I simulate the electric potential field from a wavefunction?
I was interested in making what I thought would be a simple simulation of an electron encountering a positron by numerically solving the Schrodinger equation over several time steps, but I've run ...
4
votes
2answers
228 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 ...
0
votes
2answers
145 views
Planet's Moon attrated by sun [closed]
I'm currently writing a code to generate solar system and $N$ number of planets / moons.
I use real data to test (earth / sun / moon data).
I succeeded in placing the earth and make it orbit around ...
0
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0answers
100 views
Requesting decent analysis on FEMM simulation data
I have been running simulations in FEMM for different magnetic configurations as an attempt to understand better how do they work and why it is impossible to come up with the holy grail of energy: a ...
0
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1answer
178 views
How to simulate temperature change of oven?
I am trying to write a software, which will model the oven temperature change when turning on/off. The data I can get is graph, by taking temperature reading each second from T0 time up to some ...
1
vote
1answer
90 views
neutron transport approximations for nuclear rocket modelling
I'm pretty ignorant regarding neutron and nuclear transport modelling, but i'm interested in trying to pursue it for a particular pet project. It regards modelling of nuclear reactions like those ...
5
votes
1answer
160 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 ...
7
votes
1answer
209 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 ...
0
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1answer
262 views
Are We Living in a Simulated Universe? [closed]
If the universe is just a Matrix- like simulation, how could we ever know? Physicist Silas Beane of the University of Bonn, Germany, thinks he has the answer!. His paper “Constraints on the Universe ...
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0answers
23 views
Rolling (without slipping) ball on a moving surface 2 [duplicate]
Possible Duplicate:
Rolling (without slipping) ball on a moving surface
Apparently I didn't log in properly when I asked a question this morning: Rolling (without slipping) ball on a moving ...
2
votes
1answer
303 views
Rolling (without slipping) ball on a moving surface
I've been looking at examples of a ball rolling without slipping down an inclined surface. What happens if the incline angle changes as the ball is rolling?
More precisely I've been trying to find ...
5
votes
1answer
92 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 ...
0
votes
1answer
143 views
Software to simulate dynamics of objects in a given gravitation field [closed]
I want to simulate and test set of 2D designs that basically have pulley/gear/chain-linked systems under Gravity (For e.g. to check how a pulley would rotate given particular weights, of course I'm ...
3
votes
0answers
52 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 ...
2
votes
1answer
87 views
Mutual Interaction of $N$-Particles in a Cartesian Plane
I am making a simulation of $N$-Particles in a cartesian plane and need help with understanding the basics.
At anytime, in my particle system, I will have $N$ number of particles. I am treating the ...
1
vote
1answer
95 views
boundary limit conditions in 3D water surface simulation
As is discused on this post, taking some assumptions, the water surface can be simulated by a discrete aproximation of a grid of heights using this formula
Where:
HT is the new height grid
HT-1 ...
0
votes
1answer
73 views
Verify correctness of vintage BASIC drag race phyics simulation? [closed]
I wished to make a more user-friendly version of the vintage BASIC "Drag" program, as seen here, probably in the form of a light-hearted web game:
...
2
votes
1answer
331 views
What is the best tool for simulating Vacuum and Fluids together?
I require a software to simulate Fluid simulation with the capability of supporting vacuum simulation. My requirements are that all numbers must reflect their real counterparts almost exactly. For ...
1
vote
1answer
173 views
Help: 3D visualization of magnetic field around moving point charge
The diagrams I'm able to find online only show the concentric field lines in the particle's plane, perpendicular to the motion, which of course generalizes to the cylindrical shape around a conductor. ...
0
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0answers
111 views
Can critical slowing down be used to distinguish between first and second order phase transitions?
We are simulating a percolation dynamic system where we obtain first or second order phase transitions depending on certain parameters. For certain values it is clear that we are in the first-order ...
