Questions tagged [physics]

Questions related to the application of Mathematica to problems in physics.

493 questions
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How to set interface conditions for optical waveguide in NDEigensystem?

I have been working on waveguide mode analysis using FEM in Mathematica for a week, but I haven't succeeded until now. The optical fiber-like waveguide is featured with different refractive index in ...
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How best to simulate n-body systems in a functional way?

I want to simulate a N-body system in the most functional way possible. The system I'm modeling are metallic colloidal particles in a solution of peroxide water, as here http://arxiv.org/pdf/1502....
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Modelling a cylinder

I am fairly new to Mathematica. I am trying to model an ideal cylinder of uniform density of radius R (any arbitrary value) which has a cylinder of radius R/2 missing from it. The resulting solid is ...
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Fitting a Curie-Weiss law function with a diverging point to a data

I would like to fit a function to some experimental data such that the extracted value of Curie temperature (Tc) describes the temperature at which the response flattens out to a constant value. ...
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How to plot and simulate reaction networks in Mathematica?

I am trying to simulate reaction networks like it's done in the Simulation methods in this paper. They used Xcellerator, so I after installing on Mathmatica 11.2 and trying to run their Belousov-...
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Improving NetChain for Physical Data

I am trying to improve my NetChain to better predict physical data from the industrial standard for water/steam published by the IAPWS. Basically, this industrial ...
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Turing patterns

I am new in learning Turing patterns. Is there any sample code available to generate such patterns in ecology model (Lotka–Volterra model)? The above figure is taken from this paper, and is based on ...
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Magnetic field for certain distance

I have a question in theoretical physics. I have a magnetic field created by conductor loop bz = (\[Micro] i )*8/(5 Sqrt R); with distance D = 2b and would ...
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Iterative solution for particle in magnetic field

I have some questions relating movement of a particle calculating with mathematica. A particle (mass: m, charge: q) moves on x-axis from left with speed $v_0$ to a magnetic field $\vec{B} = (0,0,B)$. ...
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Color scheme problem

I have a problem in the color scheme in a 2D spectra. After a lot of calculations, i can generate a picture like this in the last part using this instructions ...
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Can't get TensoriaCalc to work

So I'm trying to use TensoriaCalc, and it won't work. I put it this ...
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Dynamic Euler–Bernoulli beam equation

I am trying to solve for the vibration of a Euler–Bernoulli beam. The equation is $\frac{\partial ^2u(t,x)}{\partial t^2}+\frac{\partial ^4u(t,x)}{\partial x^4}=0$ For the boundary conditions I ...
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How to create an inverse pole figure color map?

To interpret electron backscatter diffraction (EBSD) results, inverse pole figures are used. A three dimensional space of directions (,  and  for those who know about crystallography) ...
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How to change the default normalization for NDEigensystem?

I'm currently using NDEigensystem to solve a PDE that describes a particle travelling on a hyperbolic (negatively curved) surface. However, the eigenfunctions that are returned by NDEigensystem are ...
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How to construct — based on physics-type notation — a magical simplex $\mathcal{W}$ of bipartite qutrits?

I have a short Mathematica program: ...
243 views

Butter side up?

I've written a piece of code that determines if a piece toast with butter lands on the butter-side or not, depending on its initial velocity and the table height. If you are interested in the physics ...
147 views

Electric Field Plot

I want to show an electric field of several arrangements of point charges in xy-plane. I wrote a routine that plots an electric field of a charge: ...
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Animating wave motion in water

Further to this question I found on MSE, I tried to replicate from here this is as far as I got: ...
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Opacity or related issue with DensityPlot3D

I'm trying to make use of the function DensityPlot3D with the following specific example ...
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Manipulate plot of a system of PDEs with NDSolve

Modeling 1D diffusion of an enzyme, e, through a sphere with substrate, s, I arrive at the below equations: I then pass these equations to NDSolve, Evaluate at a range of r and t and Plot and ...
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Using ParametricNDSolve with n subscripted functions

I want to calculate trajectories of an n-pendulum. For the number n=1 it's just a pendulum, for n=2 a double pendulum , for n=3 a triple and so on. The Solver has to solve n equations for the angle. ...
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How can I know the true range of the values returned by AudioLocalMeasurements?

I need to normalize the values of different AudioLocalMeasurements results but I can't seem to find any info regarding the range of values in which each measurement ...
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Compute the curvature of a bent stack of paper

My goal is to link the curvature of a bent stack of paper in a wind tunnel to its bending modulus $B$, knowing all the other physical properties. To this end, I would like to reproduce the numerical ...
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Circular Orbit Velocity in Vector Components

I'm trying to find out how to calculate the initial velocity needed to keep a spacecraft in a circular orbit around the Earth given its initial position and an initial angle theta in a Cartesian ...
76 views