# Questions tagged [simulations]

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### Elastic constants, transformation/basis change $P21/a\to P21/n$

I just calculated the stiffness tensor for a given material (a monoclinic molecular crystal) using molecular simulation. When trying to compare my results to published experimental results I found ...
74 views

### How to integrate over a timestep in a mass-spring model? [closed]

I'm writing a simulation of a block of matter using a "mass-spring" model, where the matter is modelled as a 3D lattice of point masses, where each point is connected by springs to the (up ...
27 views

### How is the Overlap Distribution Sampled for Spin Glasses Computationally

To study the phase transition of spin glasses, a commonly used order parameter is the Binder's parameter, defined as the 4th order cumulant of the overlap distribution $P_J(q)$, where $q$ is defined ...
22 views

### Simulated points in a closed 2D shape all moving to the edges. Is this how electrons accumulate on the surface of a wire?

I was working on a program that generates random tiles in a given shape. To do this I generated random points inside the shape and would use them to color the tiles. However, after noticing clumping ...
63 views

### Calculating orbital path of a planet around a fixed body in a deterministic way given starting conditions

I am making a simulation of the solar system in the unity game engine. A planet is orbiting a stationary star for now using Newton's law of gravitation where $F = Gm_1m_2/r^2$ for the orbit (force is ...
25 views

### Star formation rate in different galaxies

I was looking for some scale to compare my result of star formation rate and see if it is moderate or high or low. But I couldn't find any scale. Is there any paper related to such scale where Star ...
24 views

### Scattering MC toy model

I would like to make a scattering toy simulation as a computational physics project. I'm having issues visualizing which parameter of the scattering function I need to compare with the randomly ...
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### Orbit of Celestial Bodies

To give some insight, I'm creating a simulation, with gravity, planets, forces... And I would like to increase performance, by not doing unnecessary calculations. I could know what calculations, to ...
81 views

### Computing the $x$-$y$ position of a vehicle for constant acceleration

I want to very simplistically plot the $x$-$y$ position of a vehicle in 2D that can accelerate/brake and drive a constant speed while turning etc. The basic equations for determining the position for ...
37 views

### Angular acceleration component of linear acceleration

Assume I have a mass M attached to a spring which is attached to a fixed point in space, X. The mass has an arbitrary linear acceleration a applied to it, which means the spring can both be extending/...
76 views

### Resonant tunneling for wavepackets, simulation - what exactly is happening here?

I have been learning various ways to solve TDSE and naturally, wavepacket motion seemed like a good test case to check the algorithms. Then, of course, I wanted to see one of the most interesting ...
96 views

### Is there any point in doing Monte Carlo on classical 2D Ising spin systems? [closed]

The partition function of a classical Ising spin system with arbitrary bonds on any planar graph can be evaluated in polynomial time, through the FKT algorithm. And if I understand correctly, this ...
148 views

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### How Would Projectile Motion Be Described in Non-Euclidean Space?

If I and a friend found ourselves in a world described by spherical geometry (as simulated in this linked video https://youtu.be/yY9GAyJtuJ0 ) how would the kinematics equations need to be augmented ...