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Questions tagged [pde]

Use this tag for questions about partial differential equations. For questions about the Eclipse Plugin Development Environment, use eclipse-pde instead.

Partial Differential Equations are differential equations that contain unknown multivariable functions and their partial derivatives. See [http://en.wikipedia.org/wiki/Partial_differential_equation][1]

The Eclipse Plug-in Development Environment (PDE) provides tools to create, develop, test, debug, build and deploy Eclipse plug-ins, fragments, features, update sites and RCP products. PDE also provides comprehensive OSGi tooling. See [http://www.eclipse.org/pde/][2]

Questions about the Eclipse Plug-in Development Environment are better tagged as 'eclipse-pde'.

See

Partial_differential_equation

Eclipse Plug-in Development Environment

477 questions
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Solving complex PDEs in Python with FiPY

I'm attempting to solve a complex PDE with FiPy. It would appear that FiPY does not support complex arguments and the general advice seems to be to split the PDE, solve separately and then recombine. Is this still the case? Secondly, I can't see any…
Ashiataka
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Implementing crank nicolson method in matlab

I am trying to implement the crank nicolson method in matlab and have managed to get an implementation working without boundary conditions (ie u(0,t)=u(N,t)=0). The problem I am having is with adding boundary conditions. It seems that the boundary…
eBehbahani
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Mathematica: Solving a PDE that contains Conjugate of a function or Abs of a function

I'm trying numerically solve a PDE using NDSolve. I keep getting the following error: "NDSolve::ndnum: "Encountered non-numerical value for a derivative at t == 0.." It seems that I only get this error due to the presence of Abs[D[f[x,y,t],x]] or…
Uri Merhav
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How to configure FuncAnimation (dynamic plotting from matplotlib.animation) to numpy arrays?

I have some issues with the FuncAnimation fonction of MatPlotLib. I can't configure it to my code... I hope someone could help me !! This is a diffusion equation, I need to plot it for each step of the time. At each step, the result of the…
Yollanda Beetroot
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Package does not exist in this plugin

I tried importing a plugin as a source project in my workspace. Now I am getting a package does not exist in this plugin error in the Manifest.mf file. But the packages do exist in the source folder of the same plugin. What could be the issue? I…
SurRam
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How can I add the functionality of User Input to my eclipse plugin?

I am developing a plugin in eclipse which can generate a text file (based on user input) and can trigger a perl script. I can easily make a simple plugin (like Hello World) and I can add new menus and commands to it. I understand how those things…
user4252523
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3D Heat Equation in MATLAB

I am trying to model in MATLAB the temperature distribution inside a rectangular prism with boundary and initial conditions and heat equation I was trying to visualize 2D slices in the 3D shape. However, the simulation takes too long and when I try…
Orkiel
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Modeling hanging chain using numerical methods in python

I am trying to model a hanging chain using numerical methods (this pde ) by following the example here for a wave on a string. I am having trouble getting a good approximation from my differencing schemes and I am not sure why. In particular, the…
Hublot Tired
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5-th order differential equation with BVP5c

I am trying to solve this differential equation : In order to do so : there is a mathematical part consisting on determining the boundary conditions of this problem that are defined as : More precisely, the first BC is formulated differently since…
Wiss
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Error while using scipy.integrate.trapz on Gekko

I am trying to solve a PDE with gekko library which involves calculating volume flow rate by integrating velocity with the space at a certain time. Qgap==scipy.integrate.trapz(2*np.pi*xpos*np.array(u1)) where u1 is discretized at each xpos 1000…
Simon Luzara
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Problem on Solving a 1D Navier Stokes with Compressible Mass Conservation (Hydraulic Damper)

I would like to solve a 1D Navier equation on a cylindrical imposed tubes(cartesian cordinates). The flow is along y direction, with right chamber having pressure p1 and left chamber pressure p2 both initially at 8e5 Pa. The Cylindrical wall is…
Simon Luzara
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Problem on solving Partial Differential Equations with Gekko Python

I get a converging solution while trying to solve a Partial Differential Equation attached below. In my code, I want to calculate a volume flow rate over time by integrating 2pir*v(r)*dr . I have used scipy.integrate.trapz to solve this inside the…
Simon Luzara
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Fast algorithm for boundary value problem

I am looking for the fastest way to solve the following problem: Given some volume of lattice points in a 3D grid, some points b_i (the boundary) satisfy f(b_i)=0, while another point a_0 satisfies f(a_0)= 1. All other points (non-boundary) are…
Marvin
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Problem plotting 2d numerical solution of wave equation

I am trying to make an animation of the 2d wave equation in MATLAB (R2020a). So far I believe that the finite difference method is implemented correctly. However; when I try to plot these values using the "surf" command in matlab it does not…
M.Bakkers
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Julia physics informed neural network

Let's consider this equation: with : 0 < b < 1. I am new to julia programming, I am considering to solve this ODE equation using NeuralPDE.jl. Any idea how to write that physics informed neural network ode in julia framework ?
Minou92
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