Find answers to your questions about Computational Science or help others by answering their Computational Science questions.
I want to simulate the propagation of a sinusoidal plane wave in a rectangular domain using Finite Elements Method. First, the wave should propagate through a fluid medium, then it...
Asked on 01/11/2021
1 answerWhat I'm trying to do is simply a variation of a heavyside function, for 3 before the discontinuity and 4 after. But when I plot it, at the discontinuity it's...
Asked on 01/11/2021 by maths_mz
1 answerDoes anyone know of any strategies for creating a preconditioner $P^{-1}_sigma approx (A+sigma I)^{-1}$ given a preconditioner $P^{-1} approx A^{-1}$, preferably such that the precomputation doesn't depend on...
Asked on 01/11/2021 by deasmhumnha
0 answerThere are $N$ particles with positions $x_i(t)$ and velocities $v_i(t)$ and mass 1. There is a potential function $U_{i,j}(x_i, x_j)$ between each pair of particles,...
Asked on 01/09/2021
1 answerThe Problem The TR-BDF2 explained in this paper [1], is quite a popular numerical scheme used to integrate $dot{y} = f(t,y)$, consistent of the following two stages: begin{align}...
Asked on 01/05/2021 by kostas1335
1 answerPlease help with the following Python code for a nonlinear coupled oscillator, I am getting an error, I don't understand the problem.from scipy.optimize import minimizefrom scipy.integrate import odeintfrom qutip...
Asked on 01/05/2021 by user68207
0 answerI am trying to solve for the potential in the electric current module in Comsol. I have a wire with 2 current boundary conditions where the in equals the out....
Asked on 01/04/2021
0 answerHow would you approach a standard convex quadratic problem with convex constraints but one non-convex term ? Say $|x|^{0.4}$. $$min_x frac{1}{2} x^{T}Qx + g^Tx + c^T mathrm{sign}(x)...
Asked on 01/02/2021 by Kreol
0 answerNew to Computational Science, I hope I'm on the right exchange network for this question. I have a time series data set that contains the sum of a source data...
Asked on 01/01/2021 by jeromeResearch
0 answerI'm currently looking at the PDEbegin{align*} u_t + left[x(1-y) - (1-x)right]u_x - (1-y) u_y + (z-xy) u_z = (z-xy) u_{xy} - (1-x)u&end{align*}withbegin{align*}...
Asked on 01/01/2021 by Mike D
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